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Showing 1 to 15 of 15 for “"stokes law"”.
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On contractile force developed by the Spasmoneme, a biological spring of a peritrich ciliate Vorticella convallaria
… contraction force in normal contraction, and Stokes' law was used with the contraction force equated to the drag force on the spherically shrunken zooid. However, contraction-induced water ow does not satisfy approximations for Stokes' law because the Stokes number and Reynolds number greater …
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Fabrication, Characterization and Modeling of Functionally Graded Materials
… and thus changes the drag force of particles. A Stokes' law based model is developed to simulate the sedimentation process, demonstrate the effect of manufacturing parameters on sedimentation, and predict the graded microstructure of deposition in the depth direction. In order to improve the …
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Precipitation, Aggregation, and Settling of Asphaltenes from n-Alkane Diluted Bitumens
… content. The settling rates were modeled with Stokes’ law modified to include the fractal dimension of the aggregates and using the Sauter mean diameter for all aggregates. The model matched settling rates to within 20% of the maximum settling rate.
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Analysis of hydrodynamic drag forces acting on suspended fine particle in porous media
… suspended fine particles and the moving fluid at Stokes limit. Historically, due to the complicated geometries of porous media, researchers have had to resort to simplifying assumptions to conceptualize the underlying physics. However, the advent of high performance computing, in recent decades, …
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Coagulation between fractal aggregates and small particles and fractal properties of marine particles
… settling velocities and those calculated using Stokes' law, a semi-empirical correlation was derived to describe the permeabilities of settling fractal aggregates. A filtration model was used in conjunction with this fractal permeability correlation to predict capture rates and capture …
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Size Measurement of Fine Sediments By Electrical Resistance
… that the sediments would behave according to Stokes’ Law regarding the velocities of their settling, and the pipette method of analysis was used to measure the particle size with which to compare the results of measuring change of resistance. </p><p> The equipment used in measuring the change …
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The effect of flotation reagents on the coagulation and dewatering of flotation tailings
… water entrainment, which is consistent with Stokes' law. These results demonstrate that flotation reagents can be strategically applied to improve dewatering efficiency and effectively tackle water recirculation challenges. The study stresses the optimisation of reagent combinations to …
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A hydrodynamic study of nickel suspension in stirred tanks
… than those that do not. It was shown that the Stokes law applies up to a diameter of 150 ~m for the nickel particles. A CFD simulation strategy for studying mixing of high density solids is proposed and it is shown that a CFD simulation method can be used to develop empirical models that …
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Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates
… would be predicted from a simple formulation of Stokes’ Law. At each location, I derived a best-fit fractal correlation between the flux size distribution and the total carbon flux. The use of this relationship and the computed average sinking velocities enabled the estimation of particle flux …
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Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates
… would be predicted from a simple formulation of Stokes' Law. At each location, I derived a best-fit fractal correlation between the flux size distribution and the total carbon flux. The use of this relationship and the computed average sinking velocities enabled the estimation of particle flux …
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Computer simulation of ordering and dynamics in liquid crystals in the bulk and close to the surface
… viscosity of the medium can be evaluated using Stokes' law. With this method we successfully reproduced experimental viscosities and viscosity anisotropy for the solvent 5CB. The last line deals with the study of order induction on nematic molecules by an hydrogenated silicon surface. Gaining …
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Non-Equilibrium Thermodynamics of porous media filled by a fluid flow and of rigid bodies with an internal tensorial field influencing the thermal phenomena.
… phenomena is given. The Darcy-Brinkman-Stokes law is obtained, which represents a rate equation for the local mass flux of the fluid, with a relaxation time in which this flux evolves towards its local-equilibrium value. In Appendix B the objective representations of scalar, vectorial, …
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Investigating sediment size distributions and size-specific Sm-Nd isotopes as paleoceanographic proxy in the North Atlantic Ocean: reconstructing past deep-sea current speeds since Last Glacial Maximum
… the most Icelandic contribution is calculated by Stokes’ Law, and the lateral deep-sea current speed is calculated when the vertical settling depth and the lateral advection distance of the particle traveled before settling are constrained. Primary modelling errors originating from …
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An emperical study of diffusion: The role of particle size, particle shape, gravity, and edge effects
The theories of Brownian motion and diffusion are often treated as separate idea, though Brownian motion is believed to cause diffusion. Both theories were initially studied separately in this project via two experiments; the theories were then studied in conjunction. The Brownian motion experiment …
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Refinement of a Fertiliser-producing Urinal
… of 28% and stabilized urine had a volume of 22%. Stokes' Law was used to calculate the theoretical settling velocity, which was then compared to the experimental velocity. The Stokes' Law results showed a significantly high settling velocity of 1.22 cm/s on average. According to the urinal testing …