Applied Mathematics and Mechanics (English Edition) ›› 2017, Vol. 38 ›› Issue (12): 1679-1696.doi: https://doi.org/10.1007/s10483-017-2290-7

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Combined immersed boundary method and multiple-relaxation-time lattice Boltzmann flux solver for numerical simulations of incompressible flows

Xiaodi WU, Fu CHEN, Huaping LIU   

  1. Department of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2017-01-05 修回日期:2017-05-31 出版日期:2017-12-01 发布日期:2017-12-01
  • 通讯作者: Xiaodi WU E-mail:wuxiaodi528@163.com

Combined immersed boundary method and multiple-relaxation-time lattice Boltzmann flux solver for numerical simulations of incompressible flows

Xiaodi WU, Fu CHEN, Huaping LIU   

  1. Department of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2017-01-05 Revised:2017-05-31 Online:2017-12-01 Published:2017-12-01
  • Contact: Xiaodi WU E-mail:wuxiaodi528@163.com

摘要: A method combining the immersed boundary technique and a multirelaxation-time (MRT) lattice Boltzmann flux solver (LBFS) is presented for numerical simulation of incompressible flows over circular and elliptic cylinders and NACA 0012 Airfoil. The method uses a simple Cartesian mesh to simulate flows past immersed complicated bodies. With the Chapman-Enskog expansion analysis, a transform is performed between the Navier-Stokes and lattice Boltzmann equations (LBEs). The LBFS is used to discretize the macroscopic differential equations with a finite volume method and evaluate the interface fluxes through local reconstruction of the lattice Boltzmann solution. The immersed boundary technique is used to correct the intermediate velocity around the solid boundary to satisfy the no-slip boundary condition. Agreement of simulation results with the data found in the literature shows reliability of the proposed method in simulating laminar flows on a Cartesian mesh.

关键词: multiple relaxation time, lattice Boltzmann equation (LBE), solid-liquid coupling, multiple nonlinear coupling, moving boundary, liquid storage tank, uplift, time-split-steps, ALE method, incompressible flow, immersed boundary method

Abstract: A method combining the immersed boundary technique and a multirelaxation-time (MRT) lattice Boltzmann flux solver (LBFS) is presented for numerical simulation of incompressible flows over circular and elliptic cylinders and NACA 0012 Airfoil. The method uses a simple Cartesian mesh to simulate flows past immersed complicated bodies. With the Chapman-Enskog expansion analysis, a transform is performed between the Navier-Stokes and lattice Boltzmann equations (LBEs). The LBFS is used to discretize the macroscopic differential equations with a finite volume method and evaluate the interface fluxes through local reconstruction of the lattice Boltzmann solution. The immersed boundary technique is used to correct the intermediate velocity around the solid boundary to satisfy the no-slip boundary condition. Agreement of simulation results with the data found in the literature shows reliability of the proposed method in simulating laminar flows on a Cartesian mesh.

Key words: solid-liquid coupling, multiple nonlinear coupling, moving boundary, liquid storage tank, uplift, time-split-steps, ALE method, lattice Boltzmann equation (LBE), multiple relaxation time, immersed boundary method, incompressible flow

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