Hydrodynamic and brownian fluctuations in sedimenting suspensions.
نویسندگان
چکیده
We use a mesoscopic computer simulation method to study the interplay between hydrodynamic and Brownian fluctuations during steady-state sedimentation of hard sphere particles for Peclet numbers (Pe) ranging from 0.1-15. Even when the hydrodynamic interactions are an order of magnitude weaker than Brownian forces, they still induce backflow effects that dominate the reduction of the average sedimentation velocity with increasing particle packing fraction. Velocity fluctuations, on the other hand, begin to show nonequilibrium hydrodynamic character for Pe>1.
منابع مشابه
Interplay between hydrodynamic and Brownian fluctuations in sedimenting colloidal suspensions.
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ورودعنوان ژورنال:
- Physical review letters
دوره 93 22 شماره
صفحات -
تاریخ انتشار 2004