Volume 79, Number 3, August 2007
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||18 July 2007|
Transport coefficients of dissipative particle dynamics with finite time step
Institut für Festkörperforschung, Forschungszentrum Jülich - 52425 Jülich, Germany
Corresponding author: firstname.lastname@example.org
Accepted: 19 June 2007
The viscosity and self-diffusion constant of a mesoscale hydrodynamic method, dissipative particle dynamics (DPD), are investigated. The viscosity of DPD with finite time step, including the Lowe-Anderson thermostat, is derived analytically for the ideal-gas equation of state and phenomenologically for systems with soft repulsive potentials. The results agree well with numerical data. A velocity-scaling version of the profile-unbiased thermostat is shown to be useful to obtain faster diffusion than for the DPD thermostat.
PACS: 66.20.+d – Viscosity of liquids; diffusive momentum transport / 02.70.-c – Computational techniques; simulations / 47.11.-j – Computational methods in fluid dynamics
© Europhysics Letters Association, 2007
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