Hybrid grid-particle method for fluid mixing simulation
Hybrid grid-particle method for fluid mixing simulation
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DOI：
10.1007/s40571-015-0046-7
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发表时间：
2015-05
影响因子：
3.3
通讯作者：
T. Matsunaga;K. Shibata;K. Murotani;S. Koshizuka
中科院分区：
文献类型：
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作者：
T. Matsunaga;K. Shibata;K. Murotani;S. Koshizuka
本文提出了一种用于流体混合问题数值模拟的混合网格-颗粒法。该方法采用网格法求解不可压缩的Navier-Stokes方程，采用粒子法求解化学物质浓度的平流扩散方程。在此框架下，利用每种方法的特性，可以有效地解决微系统液-液混合典型的中雷诺数（10）和高pacclet数（10）的流体混合问题；流场在长时间步长下也能稳定求解，浓度场在最小数值扩散下也能精确求解。通过三个测试案例对所提出的混合方法进行了验证，结果表明混合方法对模拟高psamclet数下的流体混合问题具有较高的精度。
In this paper, we propose a hybrid grid-particle method for the numerical simulation of fluid mixing problem. The method solves the incompressible Navier–Stokes equations using a grid method and the advection–diffusion equation of chemical species concentration using a particle method. With this framework, the fluid mixing problem at moderate Reynolds number (10) and high Péclet number (10), which is typical for liquid–liquid mixing in microsystem, can efficiently be solved utilizing the characteristics of each approach; the flow field is stably solved even with long time step, and the concentration field is accurately solved with minimal numerical diffusion. The proposed hybrid method is examined through three test cases, and the results show that the hybrid method provides substantial accuracy for simulating the fluid mixing problem at high Péclet number.