The temperature in dissipative particle dynamics

Wouter K. den Otter, J.H.R. Clarke

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

The two most popular algorithms for dissipative particle dynamics (DPD) are critically discussed. In earlier papers, the Groot–Warren algorithm with λ = 1/2 was recommended over the original Hoogerbrugge–Koelman scheme on the basis of a marked difference in their equilibrium temperatures. We show, however, that both schemes produce identical trajectories. Expressions for the temperatures of an ideal gas and a liquid as functions of the simulation parameters are presented. Our findings indicate that the current DPD algorithms do not possess a unique temperature because of the way in which the dissipative and random forces are included. The commonly used large time steps are beyond the stability limits of the conservative force field integrator.


Original languageEnglish
Pages (from-to)1179-1193
Number of pages15
JournalInternational journal of modern physics C
Volume11
DOIs
Publication statusPublished - 2000
Externally publishedYes

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