Dynamical geometry for multiscale dissipative particle dynamics

Details Dynamical geometry for multiscale dissipative particle dynamics Dynamical geometry for multiscale dissipative particle dynamics

2003-01-21

arxiv.org/abs/cond-mat/0301378v1

Physics

Condensed Matter

Soft Condensed Matter

28 pages, 8 figures

Scientific paper

10.1016/S0010-4655(03)00199-1

In this paper, we review the computational aspects of a multiscale dissipative particle dynamics model for complex fluid simulations based on the feature-rich geometry of the Voronoi tessellation. The geometrical features of the model are critical since the mesh is directly connected to the physics by the interpretation of the Voronoi volumes of the tessellation as coarse-grained fluid clusters. The Voronoi tessellation is maintained dynamically in time to model the fluid in the Lagrangian frame of reference, including imposition of periodic boundary conditions. Several algorithms to construct and maintain the periodic Voronoi tessellations are reviewed in two and three spatial dimensions and their parallel performance discussed. The insertion of polymers and colloidal particles in the fluctuating hydrodynamic solvent is described using surface boundaries.

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