what is the stokes law in menaral processing

  • Beaker Decantation Method: Classify Particles by Settling

    Beaker Decantation Method: Classify Particles by Settling View Larger Image This method for Beaker decantation is a technique used to separate a mineral sample into two size fractions according to the differences in settling velocities of the particles.

  • What Is Stokes' Law of Viscosity? | Reference.com

    Quick Answer. Stokes' law of viscosity considers forces acting upon a spherical particle suspended in liquid to derive a mathematical formula for viscosity, using the velocity at which the particle will settle at the bottom, explains Encyclopaedia Britannica.

  • Homogenizers | Dairy Processing Handbook

    Homogenizers may be equipped with one homogenizing device or two connected in series, hence the names single-stage homogenization and two-stage homogenization. ... According to Stokes' Law, the rising velocity of a particle is given by: ... The homogenizer in a processing line. In general, the homogenizer is placed upstream, i.e. before the ...

  • fluid dynamics - Original derivation of Stokes' Law for ...

    Stokes derived his law in 1851. He was a member of the Royal Society, and the paper, if he published them there, are freely available here . I cannot say, for sure, that he published in the Royal Society publications, but it seems likely.

  • What is the Reynolds Number? — SimScale Documentation

    Stokes flow, named after Stokes' approach to viscous fluid flow, is the mathematical model in which the Reynolds number is so low that it is presumed to be zero. Various scientists had conducted studies to examine properties of fluid movement after Stokes.

  • ASTM D7928 - 17 Standard Test Method for Particle-Size ...

    Stokes' Law is assumed to be valid for spherical particles even though fine silt- and clay-sized particles are more likely to be plate-shaped and have greater mineral densities than larger particles.

  • Centrifugal separators and milk standardization | Dairy ...

    The following formula 3) is obtained if the centrifugal acceleration, a, expressed as rω2, is substituted for the gravitational acceleration, g, in the aforementioned Stokes' law equation 1. Equation 3) can be used to calculate the sedimentation velocity, v, of each particle in the centrifuge.

  • Soil Texture and Structure Flashcards | Quizlet

    The manner in which soil particles are aggregated, and the nature of the pores and channels. It results in peds of different shapes.

  • Do API separators work rev 11 - oilandwaterseparator.com

    and chemical processing facilities where waters containing relatively large amounts of ... The settling of solid particles in a separation device, is governed by Stokes' Law. In an API separator, this is the working principle as well, but the droplets rise instead of fall.


    reservoirs and processing equipment. Sedimentation studies of water-oil emulsions enable the analysis of the ... named Stokes' law (Stokes, 1851): ... mineral oil. The dynamic viscosity and density at 25 °C of the organic phase were 2.64 mPa.s and 0.83 g/cm³, respectively. The aqueous phase was distilled water. The crude oil is classified ...

  • Elutriation - Wikipedia

    Elutriation is a process for separating particles based on their size, shape and density, using a stream of gas or liquid flowing in a direction usually opposite to the direction of sedimentation. This method is mainly used for particles smaller than 1 μm.

  • Unit Operations in Food Processing - R. L. Earle

    so that the flow is streamline and it should obey Stokes' Law. Liquid Separation The separation of one component of a liquid-liquid mixture, where the liquids are immiscible but finely dispersed, as in an emulsion, is a common operation in the food industry.

  • fluid dynamics - Application of Stoke's Law - Physics ...

    Stokes' law is for laminar flow, i.e. very low Reynold's numbers/very low velocity. For something the size of a car this may be correct at velocities of small fractions of a mm/s. For typical car velocities you need a drag formula with a quadratic dependence of drag force and velocity.

  • What is an Industrial Centrifuge? - Kyte Centrifuge LLC

    The law of physics governing centrifugal separation is known as Stokes Law (see Wikipedia reference "Stokes Law" for more information). Industrial centrifuges are used for separating solids from liquids, liquid-liquid separation, and liquid-liquid-solid separation.

  • Beaker Decantation Method: Classify Particles by Settling

    The procedure is based on Stokes Law which relates the settling velocity of a particle to its size and specific gravity through the equation. By calculating the settling velocity of a particle of the required cut size and specific gravity, the time for the particle to fall a certain distance unhindered through the liquid, can be calculated.

  • Oil demulsification - petrowiki.org

    Stokes' Law also applies only to isolated particles or, in this application, to dilute emulsions. A degree of flexibility in the separator design, with options to modify, is the best strategy when designing emulsion-treatment separators.

  • Stokes' Law Settling Velocity (Deposition)

    Stokes' Law • the drag on a spherical particle in a fluid is described by Stokes' Law for the following conditions: – fluid is a Newtonian incompressible fluid du k /dx k =0 – gravity is negligible g=0 – flow is creeping flow, i.e. Re<<1 du k /dx k =0 – steady-state flow du j

  • Sedimentation | geology | Britannica.com

    Stokes' equation is valid, however, only for very small spheres (under 0.04 millimetre [0.0015 inch] in diameter) and hence various modifications of Stokes' law have been proposed for nonspherical particles and particles of larger size.

  • Principles of Extractive Metallurgy - IIT Madras

    Extractive Metallurgy of Copper, W.G. Davenport, A.K. Biswas, PERGAMON ... Physical seperation/Mineral processing ... larger ones (stokes law) 2. In cyclonic movement (hydrocyclone), centrifugal force have larger influence on larger size particles than smaller ones.

  • The settling velocity of mineral, biomineral, and ...

    The settling velocity of mineral, biomineral, and biological particles and aggregates in water. Authors. ... Accuracy of these results was generally better than for the Stokes' law, the Stokes' law modified with the Schiller-Naumann drag coefficient, and Rubey's equation. ... mineral density, (b) ...

  • Physical Properties of Soil : Soil Texture - Agriinfo.in

    Soil Texture..Soil texture refers to the relative proportion of particles or it is the relative percentage by weight of the three soil separates viz., sand, silt and clay or simply refers to the size of soil particles.

  • Stokes' Law Exercise for "Rocks and Minerals"

    Stokes' Law Exercise for "Rocks and Minerals" In this exercise students determine the velocity of different kinds and sizes of particles through different kinds of fluids.

  • How long does it take a body under free fall to attain ...

    Stokes' law and terminal velocity. When any object rises or falls through a fluid it will experience a viscous drag, whether it is a parachutist or spacecraft falling through air, a stone falling through water or a bubble rising through fizzy lemonade.

  • Stokes's law - Wikipedia

    In 1851, George Gabriel Stokes derived an expression, now known as Stokes's law, for the frictional force – also called drag force – exerted on spherical objects with very small Reynolds numbers in …

  • Stokes' Law: Definition & Application - Study.com

    Stokes' law defines the drag force that exists between a sphere moving through a fluid with constant velocity. Viscosity is the resistance of a fluid to flow, and with increasing viscosity, the ...

  • General formulas for drag coefficient and settling ...

    The accurate determination of drag coefficient and settling velocity in wide Reynolds number (Re) range remains a problem. In this paper, a series of new formulas for drag coefficient of spherical particles based on theoretical laws, such as the Stokes law, the Oseen law, and the Goldstein law, were developed and fitted using 480 groups of ...

  • Thickeners - Solid Liquid Separation

    The separation of solids from a liquid by gravity sedimentation has traces to the early days of civilization. The normal practice at those times was to use jars or pits mainly for the clarification of extracted liquids such as wine or olive oil from contaminating insoluble matter.


    By Stokes law, with no other factors being considered (free settling), particles of the same size in a fluid will achieve a settling velocity dependent on two times their relative densities in ...