A hybrid particle-mesh method for viscous, incompressible, multiphase flows
A hybrid particle-mesh method for viscous, incompressible, multiphase flows
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DOI：
10.1016/j.jcp.2004.07.002
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发表时间：
2005-01-01
影响因子：
4.1
通讯作者：
Oka, Y
中科院分区：
文献类型：
--
作者：
Liu, J;Koshizuka, S;Oka, Y
描述了一种混合方法来模拟非定常多相流，其中尖锐的界面将不同密度和粘度的不可压缩流体分开。一个阶段是由移动的粒子和其他阶段被定义在静止的网格。流场在固定网格上采用保守有限体积近似离散，界面由运动通过固定网格的颗粒分布自动捕捉。表面张力和壁粘附的影响进行了评估的连续表面力模型。不同的相被视为一种具有可变材料特性的流体。流体性质如密度和粘度的平流是通过跟随粒子的运动来完成的。该方法简化了界面相互作用的计算，使得能够精确地建模二维和三维多相流，并且不对具有表面张力的流体界面的动态演化施加任何建模限制。数值模拟结果表明了该方法的有效性。(C)2004爱思唯尔公司All rights reserved.
A hybrid method to simulate unsteady multiphase flows in which a sharp interface separates incompressible fluids of different density and viscosity is described. One phase is represented by moving particles and the other phase is defined on stationary mesh. The flow field is discretized by a conservative finite volume approximation on the stationary mesh, and the interface is automatically captured by the distribution of particles moving through the stationary mesh. The effects of surface tension and wall adhesion are evaluated by the continuum surface force model. The different phases are treated as one fluid with variable material properties. Advection of fluid properties such as density and viscosity is done by following the motion of the particles. The method simplifies the calculation of interface interaction, enables accurate modeling of two- and three-dimensional multiphase flows and does not impose any modeling restrictions on the dynamic evolutions of fluid interfaces having surface tension. Several two-dimensional numerical simulations are given to illustrate the efficiency of the hybrid method. (C) 2004 Elsevier Inc. All rights reserved.