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Mixing (process engineering)

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974:, where most of the resistance to mass transfer occurs. Axial-flow impellers are preferred for solid suspension because solid suspension needs momentum rather than shear, although radial-flow impellers can be used in a tank with baffles, which converts some of the rotational motion into vertical motion. When the solid is denser than the liquid (and therefore collects at the bottom of the tank), the impeller is rotated so that the fluid is pushed downwards; when the solid is less dense than the liquid (and therefore floats on top), the impeller is rotated so that the fluid is pushed upwards (though this is relatively rare). The equipment preferred for solid suspension produces large volumetric flows but not necessarily high shear; high flow-number turbine impellers, such as hydrofoils, are typically used. Multiple turbines mounted on the same shaft can reduce power draw. 999:
to use but are less accurate and don't cover any possible designs. The most popular correlation is the ‘just suspended speed’ correlation published by Zwietering (1958). It's an easy to use correlation but it is not meant for homogeneous suspension. It only provides a crude estimate of the stirring speed for ‘bad’ quality suspensions (partial suspensions) where no particle remains at the bottom for more than 1 or 2 seconds. Another equivalent correlation is the correlation from Mersmann (1998). For ‘good’ quality suspensions, some examples of useful correlations can be found in the publications of Barresi (1987), Magelli (1991), Cekinski (2010) or Macqueron (2017).
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experience gained with these different machines, engineering knowledge has been developed to construct reliable equipment and to predict scale-up and mixing behavior. Nowadays the same mixing technologies are used for many more applications: to improve product quality, to coat particles, to fuse materials, to wet, to disperse in liquid, to agglomerate, to alter functional material properties, etc. This wide range of applications of mixing equipment requires a high level of knowledge, long time experience and extended test facilities to come to the optimal selection of equipment and processes.
2141: 1125: 2277: 2269: 1061:, or diffuses slowly into the liquid. Mixing in a tank is also useful when a (relatively) slow chemical reaction is occurring in the liquid phase, and so the concentration difference in the thin layer near the bubble is close to that of the bulk. This reduces the driving force for mass transfer. If there is a (relatively) fast chemical reaction in the liquid phase, it is sometimes advantageous to disperse but not recirculate the gas bubbles, ensuring that they are in 2261: 2293: 2245: 2285: 718: 1913: 2253: 978: 2237: 2482:-shaped blades encased in segments of cylindrical housings. These intersect so as to leave a ridge between the blades. The blades may be cored for circulation of heating or cooling. Its invention resulted in major labor and capital savings in the tire industry, doing away with the initial step of roller-milling rubber. It is also used for reinforcing fillers in a resin system. 842:. Often minor liquid additions are made to the dry blend to modify the product formulation. Blending times using dry ingredients are often short (15–30 minutes) but are somewhat dependent upon the varying percentages of each component, and the difference in the bulk densities of each. Ribbon, paddle, tumble and vertical blenders are available. Many products including 2015:
mixture come out the discharge of the machine. Many industries have converted to continuous mixing for many reasons. Some of those are ease of cleaning, lower energy consumption, smaller footprint, versatility, control, and many others. Continuous mixers, such as the twin-screw Continuous Processor, also have the ability to handle very high viscosities.
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In addition to performing typical batch mixing operations, some mixing can be done continuously. Using a machine like the Continuous Processor, one or more dry ingredients and one or more liquid ingredients can be accurately and consistently metered into the machine and see a continuous, homogeneous
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Gas–solid mixing may be conducted to transport powders or small particulate solids from one place to another, or to mix gaseous reactants with solid catalyst particles. In either case, the turbulent eddies of the gas must provide enough force to suspend the solid particles, which otherwise sink under
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is used for this purpose, with the packing acting as a motionless mixer and the air pump providing the driving force. When a tank and impeller are used, the objective is typically to ensure that the gas bubbles remain in contact with the liquid for as long as possible. This is especially important if
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built on theoretical developments, experimental measurements and/or computational fluid dynamics data. Computational fluid dynamics calculations are quite accurate and can accommodate virtually any tank and agitator designs, but they require expertise and long computation time. Correlations are easy
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are useful for dispersing gases into liquids, but are not very helpful for dispersing settled solids into liquid. Newer turbines have largely supplanted the Rushton turbine for gas–liquid mixing, such as the Smith turbine and Bakker turbine. The power number is an empirical measure of the amount of
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of the solid volume fraction field in the mixing tank). A perfect suspension would have a RSD of 0% but in practice, a RSD inferior or equal to 20% can be sufficient for the suspension to be considered homogeneous, although this is case-dependent. The RSD can be obtained by experimental measurements
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Blending powders is one of the oldest unit-operations in the solids handling industries. For many decades powder blending has been used just to homogenize bulk materials. Many different machines have been designed to handle materials with various bulk solids properties. On the basis of the practical
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Mixing of liquids occurs frequently in process engineering. The nature of liquids to blend determines the equipment used. Single-phase blending tends to involve low-shear, high-flow mixers to cause liquid engulfment, while multi-phase mixing generally requires the use of high-shear, low-flow mixers
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area between the two fluids is maximized. Beyond just interfacing the two liquids people also made twisting channels to force the two fluids to mix. These included multilayered devices where the fluids would corkscrew, looped devices where the fluids would flow around obstructions and wavy devices
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is the viscosity of the fluid. Note that the mixer power is strongly dependent upon the rotational speed and impeller diameter, and linearly dependent upon either the density or viscosity of the fluid, depending on which flow regime is present. In the transitional regime, flow near the impeller is
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have been traditionally used to disperse gases into liquids, but newer options, such as the Smith turbine and Bakker turbine are becoming more prevalent. One of the issues is that as the gas flow increases, more and more of the gas accumulates in the low pressure zones behind the impeller blades,
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When materials are cohesive, which is the case with e.g. fine particles and also with wet material, convective mixing is no longer sufficient to obtain a randomly ordered mixture. The relative strong inter-particle forces form lumps, which are not broken up by the mild transportation forces in the
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In powder two different dimensions in the mixing process can be determined: convective mixing and intensive mixing. In the case of convective mixing material in the mixer is transported from one location to another. This type of mixing leads to a less ordered state inside the mixer, the components
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Solid-solid mixing can be performed either in batch mixers, which is the simpler form of mixing, or in certain cases in continuous dry-mix, more complex but which provide interesting advantages in terms of segregation, capacity and validation. One example of a solid–solid mixing process is mulling
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There are two main types of close-clearance mixers: anchors and helical ribbons. Anchor mixers induce solid-body rotation and do not promote vertical mixing, but helical ribbons do. Close clearance mixers are used in the laminar regime, because the viscosity of the fluid overwhelms the inertial
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from powders), and liquid–liquid blending. Another peculiarity of laboratory mixing is that the mixer rests on the bottom of the vessel instead of being suspended near the center. Furthermore, the vessels used for laboratory mixing are typically more widely varied than those used for industrial
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on the outside but dry on the inside. These types of materials are not easily mixed into liquid with the types of mixers preferred for solid suspension because the agglomerate particles must be subjected to intense shear to be broken up. In some ways, deagglomeration of solids is similar to the
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in each other occurs frequently in engineering (and in everyday life). An everyday example would be the addition of milk or cream to tea or coffee. Since both liquids are water-based, they dissolve easily in one another. The momentum of the liquid being added is sometimes enough to cause enough
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Suspension of solids into a liquid is done to improve the rate of mass transfer between the solid and the liquid. Examples include dissolving a solid reactant into a solvent, or suspending catalyst particles in liquid to improve the flow of reactants and products to and from the particles. The
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Liquid–solid mixing is typically done to suspend coarse free-flowing solids, or to break up lumps of fine agglomerated solids. An example of the former is the mixing granulated sugar into water; an example of the latter is the mixing of flour or powdered milk into water. In the first case, the
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in the fluid being mixed. This is acceptable on a small scale, since the vessels are small and mixing therefore occurs rapidly (short blend time). A variety of stir bar configurations exist, but because of the small size and (typically) low viscosity of the fluid, it is possible to use one
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liquid with the bubble plume. This draws liquid upwards inside the plume, and causes liquid to fall outside the plume. If the viscosity of the liquid is too high to allow for this (or if the solid particles are too heavy), an impeller may be needed to keep the solid particles suspended.
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Many of the equations used for determining the output of mixers are empirically derived, or contain empirically derived constants. Since mixers operate in the turbulent regime, many of the equations are approximations that are considered acceptable for most engineering purposes.
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The type of operation and equipment used during mixing depends on the state of materials being mixed (liquid, semi-solid, or solid) and the miscibility of the materials being processed. In this context, the act of mixing may be synonymous with stirring-, or kneading-processes.
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is the dominant mechanism whereby two different fluids come together. Diffusion is a relatively slow process. Hence a number of researchers had to devise ways to get the two fluids to mix. This involved Y junctions, T junctions, three-way intersections and designs where the
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or by calculations. Measurements can be performed at full scale but this is generally unpractical, so it is common to perform measurements at small scale and use a "scale-up" criterion to extrapolate the RSD from small to full scale. Calculations can be performed using a
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that must be mixed are distributed over the other components. With progressing time the mixture becomes more randomly ordered. After a certain mixing time the ultimate random state is reached. Usually this type of mixing is applied for free-flowing and coarse materials.
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torque needed to drive different impellers in the same fluid at constant power per unit volume; impellers with higher power numbers require more torque but operate at lower speed than impellers with lower power numbers, which operate at lower torque but higher speeds.
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Ribbon blenders are very common in process industries for performing dry-mixing operations. The mixing is performed thanks to 2 helix (ribbon) welded on the shafts. Both helix move the product in opposite directions thus achieving the mixing (see picture of ribbon
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forces of the flow and prevents the fluid leaving the impeller from entraining the fluid next to it. Helical ribbon mixers are typically rotated to push material at the wall downwards, which helps circulate the fluid and refresh the surface at the wall.
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At an industrial scale, efficient mixing can be difficult to achieve. A great deal of engineering effort goes into designing and improving mixing processes. Mixing at industrial scale is done in batches (dynamic mixing), inline or with help of
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particles can be lifted into suspension (and separated from one another) by bulk motion of the fluid; in the second, the mixer itself (or the high shear field near it) must destabilize the lumps and cause them to disintegrate.
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Multiphase mixing occurs when solids, liquids and gases are combined in one step. This may occur as part of a catalytic chemical process, in which liquid and gaseous reagents must be combined with a solid catalyst (such as
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Rotational Speed, "N" is usually measured in revolutions per minute (RPM) or revolutions per second (RPS). This variable refers to the rotational speed of the impeller as this number can differ along points of the drive
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Mixing is performed to allow heat and/or mass transfer to occur between one or more streams, components or phases. Modern industrial processing almost always involves some form of mixing. Some classes of
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Macqueron, C. (2018). "Solid-Liquid Mixing in Stirred Vessels: Numerical Simulation, Experimental Validation and Suspension Quality Prediction Using Multivariate Regression and Machine Learning".
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When scaled down to the microscale, fluid mixing behaves radically different. This is typically at sizes from a couple (2 or 3) millimeters down to the nanometer range. At this size range normal
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convective mixer. To decrease the lump size additional forces are necessary; i.e. more energy intensive mixing is required. These additional forces can either be impact forces or shear forces.
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and therefore require comparatively little torque to spin at high speed. High shear dispersers are used for forming emulsions (or suspensions) of immiscible liquids and solid deagglomeration.
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or by simple hand-shaking. Sometimes mixing in laboratory vessels is more thorough and occurs faster than is possible industrially. Magnetic stir bars are radial-flow mixers that induce
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are used to reduce speed and increase torque. Some applications require the use of multi-shaft mixers, in which a combination of mixer types are used to completely blend the product.
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Nagy B; et al. (2017). "In-line Raman spectroscopic monitoring and feedback control of a continuous twin-screw pharmaceutical powder blending and tableting process".
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Possible threats during macro mixing is the de-mixing of the components, since differences in size, shape or density of the different particles can lead to segregation.
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When a mixing impeller rotates in the fluid, it generates a combination of flow and shear. The impeller generated flow can be calculated with the following equation:
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which reduces the power drawn by the mixer (and therefore its effectiveness). Newer designs, such as the GDX impeller, have nearly eliminated this problem.
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of both liquids is relatively low. If necessary, a spoon or paddle could be used to complete the mixing process. Blending in a more viscous liquid, such as
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One example of a solid–liquid mixing process in industry is concrete mixing, where cement, sand, small stones or gravel and water are commingled to a
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High shear dispersers create intense shear near the impeller but relatively little flow in the bulk of the vessel. Such devices typically resemble
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increases the rate of mass transfer within the bulk of the fluid, and the convection of material away from the particles decreases the size of the
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or form lumps during transportation and storage. Starchy materials or those that form gels when exposed to solvent can form lumps that are
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where the channel would constrict and flare out. Additionally channels with features on the walls like notches or groves were tried.
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Tank Diameter, "T" The inside diameter of a cylindrical vessel. Most mixing vessels receiving industrial mixers will be cylindrical.
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Flow numbers for impellers have been published in the North American Mixing Forum sponsored Handbook of Industrial Mixing.
2575:"Powder Mixing - Design - problem solving - Ribbon blender, Paddle mixer, Drum blender, Froude Number - PowderProcess.net" 3013: 1987:. At high Peclet numbers (> 1), advection dominates. At low Peclet numbers (< 1), diffusion dominates. 2582: 3358: 1929:
configuration for nearly all mixing tasks. The cylindrical stir bar can be used for suspension of solids, as seen in
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which pass fluid at high pressure through an orifice and subsequently over a blade. This subjects the fluid to high
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Static mixers are used when a mixing tank would be too large, too slow, or too expensive to use in a given process.
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Impeller Diameter, "D" is measured for industrial mixers as the maximum diameter swept around the axis of rotation.
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Magelli, F. (1991). "Solids Concentration Distribution in Slurry Reactors Stirred with Multiple Axial Impeller".
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Mersmann, A. (1998). "Theoretical prediction of the minimum stirrer speed in mechanically agitated suspensions".
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Tamburini, A. (2012). "CFD Predictions of Sufficient Suspension Conditions in Solid-Liquid Agitated Tanks".
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Ullmann, Fritz (2005). Ullmann's Chemical Engineering and Plant Design, Volumes 1–2. John Wiley & Sons.
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With the right equipment, it is possible to mix a solid, liquid or gas into another solid, liquid or gas. A
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that operate at standard speeds of 1800 or 1500 RPM, which is typically much faster than necessary.
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fermenter may require the mixing of microbes, gases and liquid medium for optimal yield; organic
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that are metallic parts for automobile, machine building, construction or other industries.
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The power required to rotate an impeller can be calculated using the following equations:
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is usually not a problem. An everyday example of this type of mixing is the production of
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and plastics. The original design dates back to 1916. The mixer consists of two rotating
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blades and are rotated at high speed. Because of their shape, they have a relatively low
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of the water in a swimming pool to homogenize the water temperature, and the stirring of
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organic phase; production of pharmaceutical tablets requires blending of solid powders.
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One way to know if mixing is happening due to advection or diffusion is by finding the
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are manufactured in these designs. Dry blenders range in capacity from half-cubic-foot
851: 707: 602: 236: 192: 187: 2759: 3406: 3354: 3304: 3153:"Determination of the flow field inside a Sonolator liquid whistle using PIV and CFD" 2983: 2908: 2805: 2732: 2697: 2658: 2648: 2636: 2474:. Internal batch mixers such as the Banbury mixer are used for mixing or compounding 2276: 1596:{\displaystyle {\theta _{95}}={\frac {5.40}{P_{o}^{1 \over 3}N}}({\frac {T}{D}})^{2}} 910: 895: 711: 219: 170: 2991: 2861: 2837: 2820: 2140: 985:
The degree of homogeneity of a solid-liquid suspension can be described by the RSD (
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Impeller Pumping Capacity, "Q" The resulting fluid motion from impeller rotation.
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can also be used to build models way more accurate than "classical" correlations.
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Zwietering, T.N. (1958). "Suspending of solid particles in liquid by agitators".
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Investigation of Fluid Dynamics and Emulsification in Sonolator Liquid Whistles
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is the (dimensionless) power number, which is a function of impeller geometry;
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http://app.knovel.com/hotlink/toc/id:kpUCEPDV02/ullmanns-chemical-engineering
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The time required to blend a fluid to within 5% of the final concentration,
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per unit volume to achieve the same homogeneity in the same amount of time.
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of the flow. Turbulent or transitional mixing is frequently conducted with
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Different types of impellers are used for different tasks; for instance,
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which are typically used to blend multiple dry components until they are
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Process of mechanically stirring a heterogeneous mixture to homogenize it
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Peclet number = (flow velocity × mixing path) / diffusion coefficient
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does not happen unless it is forced by a hydraulic pressure gradient.
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Edward L. Paul; Victor Atiemo-Obeng; Suzanne M. Kresta, eds. (2003).
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A selection of turbine geometries and power numbers are shown below.
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International Journal of Nonlinear Sciences and Numerical Simulation
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Ryan, David; Baker, Michael; Kowalski, Adam; Simmons, Mark (2018).
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http://www.dairynetwork.com/product.mvc/Continuous-Processor-0002
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Barresi, A. (1987). "Solid dispersion in an agitated vessel".
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models to 500-cubic-foot production units. A wide variety of
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Axial flow impeller (left) and radial flow impeller (right).
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For liquid mixing, the nomenclature is rather standardized:
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Power, "P" Is the energy input into a system usually by an
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Machine for incorporating liquids and finely ground solids
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is the rotational speed, typically rotations per second;
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blending of immiscible liquids, except for the fact that
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turbulent and so the turbulent power equation is used.
3036:"High Viscosity Mixers: Dual and Triple Shaft Mixers" 1862: 1811: 1733: 1611: 1522: 1514:, can be calculated with the following correlations: 1491: 1467: 1440: 1420: 1400: 1380: 1353: 1295: 1237: 1182: 41: 3402:
Visualizations of fluid dynamics in mixing processes
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Wiki on equipment for mixing bulk solids and powders
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Handbook of Industrial Mixing: Science and Practice
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or pressure, vari speed drives, etc. are available.
913:and reusable mass, applied for molding and pouring 2958:Nguyen, Nam-Trung; Wu, Zhigang (1 February 2005). 2647:. SFGP - SociĂ©tĂ© Française de GĂ©nie des ProcĂ©dĂ©s. 1897: 1846: 1794: 1717: 1595: 1506: 1473: 1453: 1426: 1406: 1386: 1366: 1337: 1279: 1216: 76: 3407:A textbook chapter on mixing in the food industry 2957: 2392:is a device used to mix round products including 3425: 3419:Information on Solids mixing - powderprocess.net 3150: 1946:may be used in addition to the more cylindrical 660:physical system with the intent to make it more 2296:Double shaft mixer for high-viscosity materials 1044:Liquids and gases are typically mixed to allow 767:or transitional flow regimes, depending on the 3385:Dry Blender Selection Criteria Technical Paper 2964:Journal of Micromechanics and Microengineering 2027:Selected Turbine Geometries and Power Numbers 1993: 1805:The Transitional/Turbulent boundary occurs at 1920:At a laboratory scale, mixing is achieved by 672:batter to eliminate lumps (deagglomeration). 625: 3126:"A Practical Guide to High Speed Dispersion" 1856:The Laminar/Transitional boundary occurs at 1128:Schematic drawing of a fluidized bed reactor 710:. A classical example of segregation is the 77:{\displaystyle J=-D{\frac {d\varphi }{dx}}} 2710: 1953: 905:, fine coal dust and water are mixed to a 632: 618: 3220: 3176: 2851: 2836: 2825:Brazilian Journal of Chemical Engineering 2675: 2634: 2517: 2515: 2156: 1165: 2894: 2818: 2745: 2291: 2283: 2275: 2267: 2259: 2251: 2243: 2235: 2165: 2139: 1911: 1847:{\displaystyle P_{o}^{1 \over 3}Re=6404} 1123: 1065:and can transfer mass more efficiently. 1006: 976: 884: 782: 744: 721:Schematics of an agitated vessel with a 716: 2791: 2772: 2470:. The "Banbury" trademark is owned by 2280:Industrial High shear Mixer/Granulator. 1898:{\displaystyle P_{o}^{1 \over 3}Re=186} 1048:to occur. For instance, in the case of 1015:pigments, and materials that have been 981:Solid volume fraction in a mixing tank 753: 3426: 3286: 2921:from the original on 21 November 2012. 2585:from the original on 28 September 2017 2512: 1280:{\displaystyle P=P_{o}\rho N^{3}D^{5}} 1036:from liquid milk and solid ice cream. 940: 3268:from the original on 16 February 2018 3242:(EngD.). University of Birmingham, UK 2641:RĂ©cents ProgrĂšs en GĂ©nie des ProcĂ©dĂ©s 1338:{\displaystyle P=K_{p}\mu N^{2}D^{3}} 1132: 957:, used in the construction industry. 826: 733:is highly abstract, and is a part of 3346: 3235: 2630: 2628: 2626: 2442:The blades each rotate on their own 2228:, deagglomeration and disinfection. 1907: 1106: 1039: 924: 759:to create droplets of one liquid in 3128:. Hockmeyer.com. 18 December 2012. 3106:from the original on 14 August 2017 3080:from the original on 14 August 2017 3016:from the original on 2 January 2018 3006:"Microfluidic Mixing - Redbud Labs" 2611:from the original on 14 August 2017 2427:This mixer is ideal for mixing and 1461:is the laminar power constant; and 1075: 1057:the gas is expensive, such as pure 960: 13: 3378: 2201: 14: 3460: 3390: 3347:Leab, Daniel J. (26 April 1985). 3132:from the original on 10 June 2017 2939:from the original on 11 June 2017 2882:from the original on 11 June 2017 2623: 2541:from the original on 26 June 2017 2003:. Moving mixers are powered with 1434:is the diameter of the impeller; 815: 3353:. University of Illinois Press. 3076:. Bakker.org. 16 December 1998. 3042:from the original on 3 July 2017 2933:"Power Number (Np) for turbines" 2431:viscous pastes (up to 6 million 2187: 656:that involves manipulation of a 3340: 3315: 3280: 3254: 3229: 3185: 3144: 3118: 3092: 3066: 3054: 3028: 2998: 2951: 2925: 2868: 2845: 2838:10.1590/S0104-66322010000200005 2812: 2785: 2766: 2272:Industrial Double Cone Blender. 691:requires concentrated (liquid) 2739: 2704: 2669: 2597: 2567: 2553: 2527: 2212:Liquid whistles are a kind of 1706: 1692: 1689: 1676: 1584: 1570: 1507:{\displaystyle {\theta _{95}}} 1: 3301:10.1016/j.ijpharm.2017.07.041 3102:. Bakker.org. 10 April 1998. 2862:10.13140/RG.2.2.11074.84164/1 2760:10.1016/S0255-2701(98)00057-9 2607:. Bakker.org. 10 April 1998. 2537:. Bakker.org. 10 April 1998. 2505: 2313:Twin-Screw Continuous Blender 1394:is the density of the fluid; 3201:Chemical Engineering Science 3157:Chemical Engineering Science 2806:10.1016/0255-2701(91)87003-L 2775:Chemical Engineering Science 2733:10.1016/0009-2509(58)85031-9 2713:Chemical Engineering Science 2635:Macqueron, Corentin (2017). 2535:"Various Mixing Experiments" 1217:{\displaystyle Q=Fl*N*D^{3}} 992:computational fluid dynamics 664:. Familiar examples include 7: 3074:"Asymmetric Blade Impeller" 2488: 2374:Hot/Cold mixing combination 2220:stresses and may result in 2018: 1994:Industrial mixing equipment 1011:Very fine powders, such as 987:Relative Standard Deviation 787:Mixing of liquids that are 10: 3465: 2984:10.1088/0960-1317/15/2/R01 2466:mixer, named for inventor 2264:Industrial Ribbon Blender. 2205: 2191: 2169: 1079: 819: 800:to mix the two, since the 706:The opposite of mixing is 3370:– via Google Books. 3222:10.1016/j.ces.2018.06.004 3178:10.1016/j.ces.2017.01.035 3100:"Helical Ribbon Impeller" 2339:Double & Triple Shaft 2134: 3350:The Labor History Reader 2690:10.1515/ijnsns-2012-0027 2248:Industrial Paddle Mixer. 2231: 136:Clausius–Duhem (entropy) 86:Fick's laws of diffusion 3412:3 February 2019 at the 3327:www.accessmylibrary.com 3060:"Continuous Processor" 2345:High Shear Rotor Stator 2240:Industrial Paddle Mixer 1954:Mixing in microfluidics 808:, requires more mixing 294:Navier–Stokes equations 232:Material failure theory 2960:"Micromixers—a review" 2297: 2289: 2281: 2273: 2265: 2257: 2249: 2241: 2157:Close-clearance mixers 2145: 2042:Blade angle (degrees) 1938:mixing; for instance, 1917: 1899: 1848: 1796: 1725:(Transitional region) 1719: 1597: 1508: 1475: 1455: 1428: 1408: 1388: 1368: 1339: 1281: 1218: 1166:Constitutive equations 1129: 982: 890: 726: 78: 2819:Cekinski, E. (2010). 2579:www.powderprocess.net 2295: 2287: 2279: 2271: 2263: 2256:Industrial V Blender. 2255: 2247: 2239: 2166:High shear dispersers 2143: 2075:Pitched blade turbine 1979:. It is the ratio of 1915: 1900: 1849: 1797: 1720: 1598: 1509: 1476: 1456: 1454:{\displaystyle K_{p}} 1429: 1409: 1389: 1387:{\displaystyle \rho } 1369: 1367:{\displaystyle P_{o}} 1340: 1282: 1219: 1127: 1007:Solid deagglomeration 994:software or by using 980: 888: 783:Single-phase blending 745:Mixing classification 731:mathematics of mixing 720: 289:Bernoulli's principle 282:Archimedes' principle 79: 3439:Industrial machinery 3323:"AML - support.gale" 3236:Ryan, David (2015). 2876:"Turbine principles" 2332:High Viscosity Mixer 2316:Continuous Processor 1860: 1809: 1731: 1609: 1520: 1489: 1474:{\displaystyle \mu } 1465: 1438: 1418: 1398: 1378: 1351: 1293: 1235: 1180: 754:Liquid–liquid mixing 381:Cohesion (chemistry) 203:Infinitesimal strain 39: 3213:2018ChEnS.189..369R 3169:2017ChEnS.163..123R 2976:2005JMiMi..15R...1N 2725:1958ChEnS...8..244Z 2325:Double Cone Blender 2029: 1926:solid body rotation 1882: 1831: 1785: 1603:(Turbulent regime) 1563: 1287:(Turbulent regime) 941:Liquid–solid mixing 737:, itself a part of 699:to be mixed with a 646:process engineering 299:Poiseuille equation 30:Continuum mechanics 24:Part of a series on 2794:Chem. Eng. Process 2748:Chem. Eng. Process 2472:Farrel Corporation 2468:Fernley H. Banbury 2319:Cone Screw Blender 2298: 2290: 2282: 2274: 2266: 2258: 2250: 2242: 2146: 2026: 1918: 1916:A magnetic stirrer 1895: 1863: 1844: 1812: 1792: 1768: 1715: 1593: 1544: 1504: 1471: 1451: 1424: 1404: 1384: 1364: 1335: 1277: 1214: 1133:Basic nomenclature 1130: 983: 898:sand, where sand, 891: 827:Solid–solid mixing 727: 505:Magnetorheological 500:Electrorheological 237:Fracture mechanics 74: 3449:Rotating machines 3444:Plastics industry 3038:. Hockmeyer.com. 2914:978-0-471-26919-9 2654:978-2-910239-85-5 2605:"Stirred Vessels" 2353:Dispersion Mixers 2138: 2137: 2045:Number of blades 1940:Erlenmeyer flasks 1922:magnetic stirrers 1908:Laboratory mixing 1880: 1829: 1802:(Laminar regime) 1790: 1703: 1687: 1674: 1651: 1581: 1568: 1561: 1427:{\displaystyle D} 1407:{\displaystyle N} 1345:(Laminar regime) 1107:Multiphase mixing 1093:drag coefficients 1040:Liquid–gas mixing 925:Mixing mechanisms 712:brazil nut effect 680:are also mixers. 678:chemical reactors 642: 641: 517: 516: 451: 450: 220:Contact mechanics 143: 142: 72: 3456: 3372: 3371: 3369: 3367: 3344: 3338: 3337: 3335: 3333: 3319: 3313: 3312: 3284: 3278: 3277: 3275: 3273: 3258: 3252: 3251: 3249: 3247: 3233: 3227: 3226: 3224: 3198: 3189: 3183: 3182: 3180: 3148: 3142: 3141: 3139: 3137: 3122: 3116: 3115: 3113: 3111: 3096: 3090: 3089: 3087: 3085: 3070: 3064: 3058: 3052: 3051: 3049: 3047: 3032: 3026: 3025: 3023: 3021: 3002: 2996: 2995: 2955: 2949: 2948: 2946: 2944: 2929: 2923: 2922: 2898: 2892: 2891: 2889: 2887: 2872: 2866: 2865: 2849: 2843: 2842: 2840: 2816: 2810: 2809: 2789: 2783: 2782: 2770: 2764: 2763: 2743: 2737: 2736: 2719:(3–4): 244–253. 2708: 2702: 2701: 2673: 2667: 2666: 2632: 2621: 2620: 2618: 2616: 2601: 2595: 2594: 2592: 2590: 2571: 2565: 2564: 2557: 2551: 2550: 2548: 2546: 2531: 2525: 2519: 2385:Planetary mixer 2371:Horizontal Mixer 2336:Counter-rotating 2328:Double Planetary 2182:drag coefficient 2172:high-shear mixer 2150:Rushton turbines 2115:Marine Propeller 2030: 2025: 1904: 1902: 1901: 1896: 1881: 1873: 1871: 1853: 1851: 1850: 1845: 1830: 1822: 1820: 1801: 1799: 1798: 1793: 1791: 1786: 1784: 1776: 1767: 1766: 1750: 1745: 1744: 1743: 1724: 1722: 1721: 1716: 1714: 1713: 1704: 1696: 1688: 1680: 1675: 1673: 1672: 1671: 1662: 1661: 1652: 1644: 1642: 1641: 1628: 1623: 1622: 1621: 1602: 1600: 1599: 1594: 1592: 1591: 1582: 1574: 1569: 1567: 1562: 1554: 1552: 1539: 1534: 1533: 1532: 1513: 1511: 1510: 1505: 1503: 1502: 1501: 1480: 1478: 1477: 1472: 1460: 1458: 1457: 1452: 1450: 1449: 1433: 1431: 1430: 1425: 1413: 1411: 1410: 1405: 1393: 1391: 1390: 1385: 1373: 1371: 1370: 1365: 1363: 1362: 1344: 1342: 1341: 1336: 1334: 1333: 1324: 1323: 1311: 1310: 1286: 1284: 1283: 1278: 1276: 1275: 1266: 1265: 1253: 1252: 1223: 1221: 1220: 1215: 1213: 1212: 1076:Gas–solid mixing 1069:Rushton turbines 1013:titanium dioxide 1001:Machine learning 961:Solid suspension 917:metal to obtain 836:industrial mixer 634: 627: 620: 466: 465: 431:Gay-Lussac's law 421:Combined gas law 371:Capillary action 256: 255: 99: 98: 83: 81: 80: 75: 73: 71: 63: 55: 21: 20: 3464: 3463: 3459: 3458: 3457: 3455: 3454: 3453: 3434:Unit operations 3424: 3423: 3414:Wayback Machine 3393: 3381: 3379:Further reading 3376: 3375: 3365: 3363: 3361: 3345: 3341: 3331: 3329: 3321: 3320: 3316: 3285: 3281: 3271: 3269: 3260: 3259: 3255: 3245: 3243: 3234: 3230: 3196: 3190: 3186: 3149: 3145: 3135: 3133: 3124: 3123: 3119: 3109: 3107: 3098: 3097: 3093: 3083: 3081: 3072: 3071: 3067: 3059: 3055: 3045: 3043: 3034: 3033: 3029: 3019: 3017: 3004: 3003: 2999: 2956: 2952: 2942: 2940: 2935:. Cercell.com. 2931: 2930: 2926: 2915: 2899: 2895: 2885: 2883: 2878:. Cercell.com. 2874: 2873: 2869: 2850: 2846: 2817: 2813: 2790: 2786: 2771: 2767: 2744: 2740: 2709: 2705: 2674: 2670: 2655: 2633: 2624: 2614: 2612: 2603: 2602: 2598: 2588: 2586: 2573: 2572: 2568: 2559: 2558: 2554: 2544: 2542: 2533: 2532: 2528: 2520: 2513: 2508: 2491: 2398:pharmaceuticals 2390:planetary mixer 2349:Impinging mixer 2301:Ribbon Blender 2234: 2210: 2204: 2202:Liquid whistles 2196: 2190: 2174: 2168: 2159: 2054:Rushton turbine 2048:Blade geometry 2039:Flow direction 2028: 2021: 2005:electric motors 1996: 1956: 1944:Florence flasks 1910: 1872: 1867: 1861: 1858: 1857: 1821: 1816: 1810: 1807: 1806: 1777: 1772: 1762: 1758: 1751: 1749: 1739: 1735: 1734: 1732: 1729: 1728: 1709: 1705: 1695: 1679: 1667: 1663: 1657: 1653: 1643: 1637: 1633: 1632: 1627: 1617: 1613: 1612: 1610: 1607: 1606: 1587: 1583: 1573: 1553: 1548: 1543: 1538: 1528: 1524: 1523: 1521: 1518: 1517: 1497: 1493: 1492: 1490: 1487: 1486: 1466: 1463: 1462: 1445: 1441: 1439: 1436: 1435: 1419: 1416: 1415: 1399: 1396: 1395: 1379: 1376: 1375: 1358: 1354: 1352: 1349: 1348: 1329: 1325: 1319: 1315: 1306: 1302: 1294: 1291: 1290: 1271: 1267: 1261: 1257: 1248: 1244: 1236: 1233: 1232: 1208: 1204: 1181: 1178: 1177: 1168: 1157:pneumatic motor 1135: 1109: 1084: 1078: 1042: 1009: 963: 953:self-hardening 943: 927: 844:pharmaceuticals 829: 824: 818: 785: 769:Reynolds number 756: 747: 723:Rushton turbine 638: 609: 608: 607: 527: 519: 518: 472:Viscoelasticity 463: 453: 452: 440: 390: 386:Surface tension 350: 253: 251:Fluid mechanics 243: 242: 241: 155: 153:Solid mechanics 145: 144: 96: 88: 64: 56: 54: 40: 37: 36: 17: 12: 11: 5: 3462: 3452: 3451: 3446: 3441: 3436: 3422: 3421: 3416: 3404: 3399: 3392: 3391:External links 3389: 3388: 3387: 3380: 3377: 3374: 3373: 3359: 3339: 3314: 3295:(1–2): 21–29. 3279: 3253: 3228: 3184: 3143: 3117: 3091: 3065: 3053: 3027: 3010:redbudlabs.com 2997: 2950: 2924: 2913: 2893: 2867: 2844: 2831:(2): 265–273. 2811: 2784: 2765: 2754:(6): 503–510. 2738: 2703: 2684:(6): 427–443. 2668: 2653: 2622: 2596: 2566: 2552: 2526: 2510: 2509: 2507: 2504: 2503: 2502: 2497: 2490: 2487: 2486: 2485: 2484: 2483: 2451:Banbury mixer 2449: 2448: 2447: 2440: 2425: 2383: 2378: 2377:Vertical mixer 2375: 2372: 2369: 2368:Intermix mixer 2366: 2363: 2360: 2357: 2354: 2351: 2346: 2343: 2340: 2337: 2334: 2329: 2326: 2323: 2320: 2317: 2314: 2311: 2308: 2307: 2306: 2233: 2230: 2226:emulsification 2208:Liquid Whistle 2206:Main article: 2203: 2200: 2192:Main article: 2189: 2186: 2170:Main article: 2167: 2164: 2158: 2155: 2136: 2135: 2132: 2131: 2128: 2125: 2122: 2119: 2116: 2112: 2111: 2108: 2105: 2102: 2099: 2096: 2092: 2091: 2088: 2085: 2082: 2079: 2076: 2072: 2071: 2068: 2065: 2062: 2059: 2056: 2050: 2049: 2046: 2043: 2040: 2037: 2034: 2020: 2017: 1995: 1992: 1955: 1952: 1909: 1906: 1894: 1891: 1888: 1885: 1879: 1876: 1870: 1866: 1843: 1840: 1837: 1834: 1828: 1825: 1819: 1815: 1789: 1783: 1780: 1775: 1771: 1765: 1761: 1757: 1754: 1748: 1742: 1738: 1712: 1708: 1702: 1699: 1694: 1691: 1686: 1683: 1678: 1670: 1666: 1660: 1656: 1650: 1647: 1640: 1636: 1631: 1626: 1620: 1616: 1590: 1586: 1580: 1577: 1572: 1566: 1560: 1557: 1551: 1547: 1542: 1537: 1531: 1527: 1500: 1496: 1470: 1448: 1444: 1423: 1403: 1383: 1361: 1357: 1332: 1328: 1322: 1318: 1314: 1309: 1305: 1301: 1298: 1274: 1270: 1264: 1260: 1256: 1251: 1247: 1243: 1240: 1211: 1207: 1203: 1200: 1197: 1194: 1191: 1188: 1185: 1167: 1164: 1163: 1162: 1159: 1153:electric motor 1149: 1146: 1142: 1134: 1131: 1108: 1105: 1080:Main article: 1077: 1074: 1041: 1038: 1008: 1005: 972:boundary layer 968:eddy diffusion 962: 959: 942: 939: 926: 923: 834:are a type of 828: 825: 820:Main article: 817: 816:Gas–gas mixing 814: 784: 781: 755: 752: 746: 743: 735:ergodic theory 697:sulfuric acids 654:unit operation 644:In industrial 640: 639: 637: 636: 629: 622: 614: 611: 610: 606: 605: 600: 595: 590: 585: 580: 575: 570: 565: 560: 555: 550: 545: 540: 535: 529: 528: 525: 524: 521: 520: 515: 514: 513: 512: 507: 502: 494: 493: 487: 486: 485: 484: 479: 474: 464: 459: 458: 455: 454: 449: 448: 442: 441: 439: 438: 433: 428: 423: 418: 413: 408: 402: 399: 398: 392: 391: 389: 388: 383: 378: 376:Chromatography 373: 368: 362: 359: 358: 352: 351: 349: 348: 329: 328: 327: 308: 296: 291: 279: 266: 263: 262: 254: 249: 248: 245: 244: 240: 239: 234: 229: 228: 227: 217: 212: 207: 206: 205: 200: 190: 185: 180: 175: 174: 173: 163: 157: 156: 151: 150: 147: 146: 141: 140: 139: 138: 130: 129: 125: 124: 123: 122: 117: 112: 104: 103: 97: 94: 93: 90: 89: 84: 70: 67: 62: 59: 53: 50: 47: 44: 33: 32: 26: 25: 15: 9: 6: 4: 3: 2: 3461: 3450: 3447: 3445: 3442: 3440: 3437: 3435: 3432: 3431: 3429: 3420: 3417: 3415: 3411: 3408: 3405: 3403: 3400: 3398: 3395: 3394: 3386: 3383: 3382: 3362: 3360:9780252011986 3356: 3352: 3351: 3343: 3328: 3324: 3318: 3310: 3306: 3302: 3298: 3294: 3290: 3289:Int. 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Pharm 3283: 3267: 3263: 3257: 3241: 3240: 3232: 3223: 3218: 3214: 3210: 3206: 3202: 3195: 3188: 3179: 3174: 3170: 3166: 3162: 3158: 3154: 3147: 3131: 3127: 3121: 3105: 3101: 3095: 3079: 3075: 3069: 3063: 3057: 3041: 3037: 3031: 3015: 3011: 3007: 3001: 2993: 2989: 2985: 2981: 2977: 2973: 2970:(2): R1–R16. 2969: 2965: 2961: 2954: 2938: 2934: 2928: 2920: 2916: 2910: 2906: 2905: 2897: 2881: 2877: 2871: 2863: 2859: 2855: 2848: 2839: 2834: 2830: 2826: 2822: 2815: 2807: 2803: 2799: 2795: 2788: 2780: 2776: 2769: 2761: 2757: 2753: 2749: 2742: 2734: 2730: 2726: 2722: 2718: 2714: 2707: 2699: 2695: 2691: 2687: 2683: 2679: 2672: 2664: 2660: 2656: 2650: 2646: 2642: 2638: 2631: 2629: 2627: 2610: 2606: 2600: 2584: 2580: 2576: 2570: 2562: 2556: 2540: 2536: 2530: 2524: 2518: 2516: 2511: 2501: 2498: 2496: 2495:Mixing paddle 2493: 2492: 2481: 2477: 2473: 2469: 2465: 2461: 2457: 2456:Banbury mixer 2453: 2452: 2450: 2445: 2441: 2438: 2434: 2430: 2426: 2423: 2419: 2415: 2411: 2407: 2403: 2399: 2395: 2391: 2387: 2386: 2384: 2382: 2379: 2376: 2373: 2370: 2367: 2365:Drum Blenders 2364: 2362:Mobile Mixers 2361: 2358: 2355: 2352: 2350: 2347: 2344: 2341: 2338: 2335: 2333: 2330: 2327: 2324: 2322:Screw Blender 2321: 2318: 2315: 2312: 2309: 2303: 2302: 2300: 2299: 2294: 2286: 2278: 2270: 2262: 2254: 2246: 2238: 2229: 2227: 2223: 2219: 2215: 2209: 2199: 2195: 2188:Static mixers 2185: 2183: 2179: 2173: 2163: 2154: 2151: 2142: 2133: 2129: 2126: 2123: 2120: 2117: 2114: 2113: 2109: 2106: 2103: 2100: 2097: 2094: 2093: 2089: 2086: 2083: 2080: 2077: 2074: 2073: 2069: 2066: 2063: 2060: 2057: 2055: 2052: 2051: 2047: 2044: 2041: 2038: 2036:Power number 2035: 2032: 2031: 2024: 2016: 2012: 2010: 2006: 2002: 2001:static mixers 1991: 1988: 1986: 1982: 1978: 1977:Peclet number 1973: 1970: 1965: 1961: 1951: 1949: 1945: 1941: 1936: 1935:growth medium 1932: 1927: 1923: 1914: 1905: 1892: 1889: 1886: 1883: 1877: 1874: 1868: 1864: 1854: 1841: 1838: 1835: 1832: 1826: 1823: 1817: 1813: 1803: 1787: 1781: 1778: 1773: 1769: 1763: 1759: 1755: 1752: 1746: 1740: 1736: 1726: 1710: 1700: 1697: 1684: 1681: 1668: 1664: 1658: 1654: 1648: 1645: 1638: 1634: 1629: 1624: 1618: 1614: 1604: 1588: 1578: 1575: 1564: 1558: 1555: 1549: 1545: 1540: 1535: 1529: 1525: 1515: 1498: 1494: 1483: 1468: 1446: 1442: 1421: 1401: 1381: 1359: 1355: 1346: 1330: 1326: 1320: 1316: 1312: 1307: 1303: 1299: 1296: 1288: 1272: 1268: 1262: 1258: 1254: 1249: 1245: 1241: 1238: 1230: 1227: 1224: 1209: 1205: 1201: 1198: 1195: 1192: 1189: 1186: 1183: 1175: 1172: 1160: 1158: 1154: 1150: 1147: 1143: 1140: 1139: 1138: 1126: 1122: 1119: 1115: 1114:hydrogenation 1104: 1102: 1098: 1094: 1090: 1087:the force of 1083: 1073: 1070: 1066: 1064: 1060: 1055: 1054:packed column 1051: 1050:air stripping 1047: 1046:mass transfer 1037: 1035: 1031: 1026: 1022: 1018: 1014: 1004: 1002: 997: 993: 988: 979: 975: 973: 969: 958: 956: 952: 947: 938: 934: 931: 922: 920: 919:sand castings 916: 912: 908: 904: 901: 897: 887: 883: 879: 877: 873: 869: 865: 861: 857: 853: 849: 845: 841: 837: 833: 823: 813: 811: 807: 803: 799: 794: 790: 780: 778: 774: 770: 766: 762: 751: 742: 740: 736: 732: 724: 719: 715: 713: 709: 704: 702: 698: 694: 690: 686: 681: 679: 673: 671: 667: 663: 659: 658:heterogeneous 655: 651: 647: 635: 630: 628: 623: 621: 616: 615: 613: 612: 604: 601: 599: 596: 594: 591: 589: 586: 584: 581: 579: 576: 574: 571: 569: 566: 564: 561: 559: 556: 554: 551: 549: 546: 544: 541: 539: 536: 534: 531: 530: 523: 522: 511: 508: 506: 503: 501: 498: 497: 496: 495: 492: 489: 488: 483: 480: 478: 475: 473: 470: 469: 468: 467: 462: 457: 456: 447: 444: 443: 437: 434: 432: 429: 427: 424: 422: 419: 417: 416:Charles's law 414: 412: 409: 407: 404: 403: 401: 400: 397: 394: 393: 387: 384: 382: 379: 377: 374: 372: 369: 367: 364: 363: 361: 360: 357: 354: 353: 347: 344: 340: 337: 333: 330: 325: 324:non-Newtonian 322: 318: 314: 313: 312: 309: 307: 304: 300: 297: 295: 292: 290: 287: 283: 280: 278: 275: 271: 268: 267: 265: 264: 261: 258: 257: 252: 247: 246: 238: 235: 233: 230: 226: 223: 222: 221: 218: 216: 213: 211: 210:Compatibility 208: 204: 201: 199: 198:Finite strain 196: 195: 194: 191: 189: 186: 184: 181: 179: 176: 172: 169: 168: 167: 164: 162: 159: 158: 154: 149: 148: 137: 134: 133: 132: 131: 127: 126: 121: 118: 116: 113: 111: 108: 107: 106: 105: 102:Conservations 101: 100: 92: 91: 87: 68: 65: 60: 57: 51: 48: 45: 42: 35: 34: 31: 28: 27: 23: 22: 19: 3364:. 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Retrieved 2529: 2500:Dry blending 2462:of internal 2455: 2389: 2342:Vacuum Mixer 2288:Drum-Blender 2214:static mixer 2211: 2197: 2194:static mixer 2178:circular saw 2175: 2160: 2147: 2022: 2013: 1997: 1989: 1974: 1957: 1919: 1855: 1804: 1727: 1605: 1516: 1484: 1347: 1289: 1231: 1228: 1225: 1176: 1173: 1169: 1136: 1110: 1085: 1082:Fluidization 1067: 1043: 1010: 996:correlations 984: 964: 948: 944: 935: 932: 928: 892: 880: 832:Dry blenders 831: 830: 822:Gas blending 791:or at least 786: 757: 748: 739:chaos theory 728: 705: 682: 674: 649: 643: 491:Smart fluids 436:Graham's law 342: 338: 335: 320: 306:Pascal's law 302: 285: 273: 128:Inequalities 18: 3272:16 February 3246:1 September 3207:: 369–379. 3163:: 123–136. 2414:electronics 2404:(including 1969:interfacial 1030:coalescence 1021:agglomerate 1017:spray dried 966:associated 951:homogeneous 856:fertilizers 840:homogeneous 725:and baffles 708:segregation 701:hydrophobic 662:homogeneous 510:Ferrofluids 411:Boyle's law 183:Hooke's law 161:Deformation 3428:Categories 2506:References 2433:centipoise 2381:Turbomixer 1118:entraining 1034:milkshakes 876:horsepower 872:laboratory 798:turbulence 563:Gay-Lussac 526:Scientists 426:Fick's law 406:Atmosphere 225:frictional 178:Plasticity 166:Elasticity 2907:. 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Index

Continuum mechanics
Fick's laws of diffusion
Mass
Momentum
Energy
Clausius–Duhem (entropy)
Solid mechanics
Deformation
Elasticity
linear
Plasticity
Hooke's law
Stress
Strain
Finite strain
Infinitesimal strain
Compatibility
Bending
Contact mechanics
frictional
Material failure theory
Fracture mechanics
Fluid mechanics
Fluids
Statics
Dynamics
Archimedes' principle
Bernoulli's principle
Navier–Stokes equations
Poiseuille equation

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