期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 201, 期 2, 页码 466-486出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2004.06.002
关键词
fluctuating hydrodynamics; mesoscopic scale; Brownian motion; micro/nanoscale computational fluid dynamics; direct numerical simulation; distributed Lagrange multiplier method; control volume method
In this paper, we present a direct numerical simulation scheme for the Brownian motion of particles. In this approach, the thermal fluctuations are included in the fluid equations via random stress terms. Solving the fluctuating hydrodynamic equations coupled with the particle equations of motion result in the Brownian motion of the particles. There is no need to add a random force term in the particle equations. The particles acquire random motion through the hydrodynamic force acting on its surface from the surrounding fluctuating fluid. The random stress in the fluid equations are easy to calculate unlike the random terms in the conventional Brownian dynamics type approaches. We present a three-dimensional implementation along with validation. (C) 2004 Elsevier Inc. All rights reserved.
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