| Issue |
EPL
Volume 79, Number 3, August 2007
|
|
|---|---|---|
| Article Number | 36002 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/79/36002 | |
| 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: hi.noguchi@fz-juelich.de
Received:
22
May
2007
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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