Journal Articles Journal of Computational Physics Year : 2017

Stable schemes for dissipative particle dynamics with conserved energy

Abstract

This article presents a new numerical scheme for the discretization of dissipative particle dynamics with conserved energy. The key idea is to reduce elementary pairwise stochastic dynamics (either fluctuation/dissipation or thermal conduction) to effective one-dimensional dynamics, and to approximate the solution of these dynamics with one step of a Metropolis-Hastings algorithm. This ensures by construction that no negative internal energies are encountered during the simulation, and hence allows to increase the admissible timesteps to integrate the dynamics, even for systems with small heat capacities. Stability is only limited by the Hamiltonian part of the dynamics, which suggests resorting to multiple timestep strategies where the stochastic part is integrated less frequently than the Hamiltonian one.

Dates and versions

hal-01416108 , version 1 (14-12-2016)

Identifiers

Cite

Gabriel Stoltz. Stable schemes for dissipative particle dynamics with conserved energy. Journal of Computational Physics, 2017, 340, pp.451-469. ⟨10.1016/j.jcp.2017.03.059⟩. ⟨hal-01416108⟩
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