A computer simulation study of multiphase squeezing flows
نویسندگان
چکیده
The rheology of dense colloidal suspensions is sensitive to modifications in the surface properties of the particles. We are using lattice Boltzmann simulations to investigate the effects of polymer coatings on the squeezing flow between parallel plates. In this study, we used random arrays of stationary and mobile particles as the simplest models of the polymer coat. We have calculated the flow field in the gap and the force between the plates, and have compared the simulation results with analytic solutions based on the Stokes and Brinkman equations. Our models span the limiting characteristics of a polymer coated layer; namely a viscous suspension and a porous medium. We find good agreement between simulations and analytic solutions, even when the coat thickness is only a few Brinkman screening lengths. © 2002 American Institute of Physics. @DOI: 10.1063/1.1461372#
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