- 03-230 C.J. Cotter, S. Reich
- An extended dissipative particle dynamics model
(201K, Postscript)
May 21, 03
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Abstract. The method of dissipative particle dynamics (DPD) was introduced by
Hoogerbrugge & Koelman to study
meso-scale material processes. The theoretical investigation of the
DPD method was initiated by Espanol who used a
Fokker-Planck formulation of the DPD method and applied the
Mori-Zwanzig projection operator calculus to obtain the equations of
hydrodynamics for DPD. A current limitation of DPD is that it
requires a clear separation of scales between the resolved and
unresolved processes. In this note, we suggest a simple extension of
DPD that allows for inclusion of unresolved processes with
exponentially decaying variance for any value of the decay rate. The
main point of the extension is that it is as easy to implement
as DPD in a numerical algorithm.
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