Implementation and Validation of Explicit Immersed Boundary Method and Lattice Boltzmann Flux Solver in OpenFOAM

被引:0
作者
Liu, Yangyang [1 ]
Zhang, Ziying [2 ]
Zhang, Hua [1 ]
Liu, Yaguang [1 ]
机构
[1] Natl Univ Singapore, Dept Mech Engn, 10 Kent Ridge Crescent, Singapore 119260, Singapore
[2] Chongqing Univ Technol, Coll Mech Engn, Chongqing 400054, Peoples R China
来源
DYNAMICS | 2024年 / 4卷 / 01期
关键词
immersed boundary method; OpenFOAM; moving boundary; lattice Boltzmann flux solver; FINITE-DIFFERENCE; NUMERICAL-CALCULATION; PHYSICAL ANALYSIS; FLOW; SIMULATION; WAKE;
D O I
10.3390/dynamics4010002
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this work, the explicit boundary-condition-enforced immersed boundary method (EIBM) and the lattice Boltzmann flux solver (LBFS) are integrated into OpenFOAM to efficiently solve incompressible flows with complex geometries and moving boundaries. The EIBM applies the explicit technique to greatly improve the computational efficiency of the original boundary-condition-enforced immersed boundary method. In addition, the improved EIBM inherits the accurate interpretation of the no-slip boundary condition and the simple implementation from the original one. The LBFS uses the finite volume method to discretize the recovered macroscopic governing equations from the lattice Boltzmann equation. It enjoys the explicit relationship between the pressure and density, which avoids solving the pressure Poisson equation and thus saves much computational cost. Another attractive feature of the LBFS lies in its simultaneous evaluation of the inviscid and viscous fluxes. OpenFOAM, as an open-source CFD platform, has drawn increasing attention from the CFD community and has been proven to be a powerful tool for various problems. Thus, implementing the EIBM and LBFS into such a popular platform can advance the practical application of these two methods and may provide an effective alternative for complicated incompressible flow problems. The performance of the integrated solver in OpenFOAM is comprehensively assessed by comparing it with the widely used numerical solver in OpenFOAM, namely, the Pressure-Implicit with Splitting of Operators (PISO) algorithm with the IBM. A series of representative test cases with stationary and moving boundaries are simulated. Numerical results confirm that the present method does not have any streamline penetration and achieves the second-order accuracy in space. Therefore, the present method implemented in the open-source platform OpenFOAM may have good potential and can serve as a powerful tool for practical engineering problems.
引用
收藏
页码:14 / 39
页数:26
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