Single-particle hydrodynamics in DPD: A new formulation
Single-particle hydrodynamics in DPD: A new formulation
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DOI：
10.1209/0295-5075/84/10012
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发表时间：
2008-10-01
期刊：
影响因子：
1.8
通讯作者：
Karniadakis, G. E.
中科院分区：
文献类型：
--
作者：
Pan, W.;Pivkin, I. V.;Karniadakis, G. E.
我们提出了耗散粒子动力学（DPD）的新公式，该公式可以正确地解释由单个粒子代表的钝体周围流动的流体动力学。特别地，我们在耗散力中引入了剪切阻力系数和相应的项，它与角动量一起包含了粒子间的非中心剪切力并保持了角动量。我们考虑了几个原型流来验证所提出的公式的性能，并与理论和基于连续体的模拟结果进行了比较。我们的方法类似于Espanol （Phys）的流体粒子法（FPM）。Rev. E, 57(1998) 2930)，它具有标准DPD方法的计算和实现简单性。中国人民解放军版权所有，2008
We present a new formulation of dissipative particle dynamics (DPD) that leads to correct hydrodynamics in flows around bluff bodies represented by a single particle. In particular, we introduce a shear drag coefficient and a corresponding term in the dissipative force, which along with the angular momentum incorporate non-central shear forces between particles and preserve angular momentum. We consider several prototype flows to verify the performance of the proposed formulation with comparisons against theoretical and continuum-based simulation results. Our method is similar to the Fluid Particle Method (FPM) of Espanol (Phys. Rev. E, 57 (1998) 2930) and it has the computational and implementation simplicity of the standard DPD approach. Copyright (C) EPLA, 2008