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Abstract: A density functional theory for colloidal dynamics is presented whichincludes hydrodynamic interactions between the colloidal particles. The theoryis applied to the dynamics of colloidal particles in an optical trap whichswitches periodically in time from a stable to unstable confining potential. Inthe absence of hydrodynamic interactions, the resulting density breathing mode,exhibits huge oscillations in the trap center which are almost completelydamped by hydrodynamic interactions. The predicted dynamical density fields arein good agreement with Brownian dynamics computer simulations.



Author: M. Rex, H. Loewen

Source: https://arxiv.org/







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