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arXiv 0804.2218cond-mat.soft
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非格子介观流体动力学模拟技术中的输运系数

Transport coefficients of off-lattice mesoscale-hydrodynamics simulation techniques

Hiroshi Noguchi, Gerhard Gompper

摘要:

研究了基于粒子的介观流体动力学方法,多粒子碰撞动力学(MPC)和耗散粒子动力学(DPD)的粘性和自扩散常数,包括有和没有角动量守恒。推导了具有理想气体状态方程和有限时间步长动力学的流体的分析结果,并与模拟数据进行了比较。特别地,对于MPC方法的所有变体,以一般形式导出粘度。在一般情况下,理论和模拟之间得到很好的协议。

英文摘要:

The viscosity and self-diffusion constant of particle-based mesoscale hydrodynamic methods, multi-particle collision dynamics (MPC) and dissipative particle dynamics (DPD), are investigated, both with and without angular-momentum conservation. Analytical results are derived for fluids with an ideal-gas equation of state and a finite-time-step dynamics, and compared with simulation data. In particular, the viscosity is derived in a general form for all variants of the MPC method. In general, very good agreement between theory and simulations is obtained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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