Seminarium Zakładu Mechaniki i Fizyki Płynów

"A multiple time-stepping scheme for dynamic simulations of dilute sedimenting suspensions"

mgr Gustavo Abade, Instytut Fizyki Teoretycznej UW

środa, 18 stycznia 2006

The purpose of this seminar is to present computer simulations of dilute suspensions undergoing gravity induced sedimentation. It is considered a system of non-Brownian spheres, which may differ in radius and density, sedimenting in a Newtonian fluid at low Reynolds number. Attention is focused on the description of a multiple time-stepping scheme to calculate the time evolution of particle configuration. This scheme is employed in an attempt to reduce the time spent on calculating hydrodynamic interactions, which is $O(N^2)$ in a system of N particles. Results for the hydrodynamic self-diffusion coefficients will be presented for mono and polydispersions.