Applied Mathematics and Mechanics (English Edition) ›› 2016, Vol. 37 ›› Issue (11): 1405-1418.doi: https://doi.org/10.1007/s10483-016-2101-8

• 论文 •    下一篇

Simulation of incompressible multiphase flows with complex geometry using etching multiblock method

Haoran LIU, Kai MU, Hang DING   

  1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
  • 收稿日期:2016-01-25 修回日期:2016-03-15 出版日期:2016-11-01 发布日期:2016-11-01
  • 通讯作者: Hang DING E-mail:hding@ustc.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (No.11425210) and the Fundamental Research Funds for the Central Universities (No.WK2090050025)

Simulation of incompressible multiphase flows with complex geometry using etching multiblock method

Haoran LIU, Kai MU, Hang DING   

  1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
  • Received:2016-01-25 Revised:2016-03-15 Online:2016-11-01 Published:2016-11-01
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No.11425210) and the Fundamental Research Funds for the Central Universities (No.WK2090050025)

摘要:

The incompressible two-phase flows are simulated using combination of an etching multiblock method and a diffuse interface (DI) model,particularly in the complex domain that can be decomposed into multiple rectangular subdomains.The etching multiblock method allows natural communications between the connected subdomains and the efficient parallel computation.The DI model can consider two-phase flows with a large density ratio,and simulate the flows with the moving contact line (MCL) when a geometric formulation of the MCL model is included.Therefore,combination of the etching method and the DI model has potential to deal with a variety of two-phase flows in industrial applications.The performance is examined through a series of numerical experiments.The convergence of the etching method is firstly tested by simulating single-phase flows past a square cylinder,and the method for the multiphase flow simulation is validated by investing drops dripping from a pore.The numerical results are compared with either those from other researchers or experimental data.Good agreement is achieved.The method is also used to investigate the impact of a droplet on a grooved substrate and droplet generation in flow focusing devices.

关键词: multiphase flow, moving contact line(MCL), multiblock, complex geometry, etching multiblock method

Abstract:

The incompressible two-phase flows are simulated using combination of an etching multiblock method and a diffuse interface (DI) model,particularly in the complex domain that can be decomposed into multiple rectangular subdomains.The etching multiblock method allows natural communications between the connected subdomains and the efficient parallel computation.The DI model can consider two-phase flows with a large density ratio,and simulate the flows with the moving contact line (MCL) when a geometric formulation of the MCL model is included.Therefore,combination of the etching method and the DI model has potential to deal with a variety of two-phase flows in industrial applications.The performance is examined through a series of numerical experiments.The convergence of the etching method is firstly tested by simulating single-phase flows past a square cylinder,and the method for the multiphase flow simulation is validated by investing drops dripping from a pore.The numerical results are compared with either those from other researchers or experimental data.Good agreement is achieved.The method is also used to investigate the impact of a droplet on a grooved substrate and droplet generation in flow focusing devices.

Key words: multiphase flow, etching multiblock method, moving contact line(MCL), multiblock, complex geometry

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