Particle-Based Mesoscale Hydrodynamic Techniques

Details Particle-Based Mesoscale Hydrodynamic Techniques Particle-Based Mesoscale Hydrodynamic Techniques

2006-10-31

arxiv.org/abs/cond-mat/0610890v1

Europhys. Lett. 78, 10005 (2007)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 2 figures, 1 table

Scientific paper

10.1209/0295-5075/78/10005

Dissipative particle dynamics (DPD) and multi-particle collision (MPC) dynamics are powerful tools to study mesoscale hydrodynamic phenomena accompanied by thermal fluctuations. To understand the advantages of these types of mesoscale simulation techniques in more detail, we propose new two methods, which are intermediate between DPD and MPC -- DPD with a multibody thermostat (DPD-MT), and MPC-Langevin dynamics (MPC-LD). The key features are applying a Langevin thermostat to the relative velocities of pairs of particles or multi-particle collisions, and whether or not to employ collision cells. The viscosity of MPC-LD is derived analytically, in very good agreement with the results of numerical simulations.

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