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A New Multi-Level Grid Multiple-Relaxation-Time Lattice Boltzmann Method with Spatial Interpolation

Author

Listed:
  • Zhixiang Liu

    (College of Information Technology, Shanghai Ocean University, Shanghai 201306, China
    East China Sea Forecast Center of State Oceanic Administration, Shanghai 200136, China)

  • Shengyong Li

    (College of Information Technology, Shanghai Ocean University, Shanghai 201306, China)

  • Jun Ruan

    (College of Information Technology, Shanghai Ocean University, Shanghai 201306, China)

  • Wenbo Zhang

    (College of Information Technology, Shanghai Ocean University, Shanghai 201306, China)

  • Liping Zhou

    (School of Computer Engineering and Science, Shanghai University, Shanghai 200444, China)

  • Dongmei Huang

    (College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China)

  • Jingxiang Xu

    (College of Engineering Science and Technology, Shanghai Ocean University, Shanghai 201306, China)

Abstract

The traditional multi-level grid multiple-relaxation-time lattice Boltzmann method (MRT-LBM) requires interpolation calculations in time and space. It is a complex and computationally intensive process. By using the buffer technique, this paper proposes a new multi-level grid MRT-LBM which requires only spatial interpolation calculations. The proposed method uses a center point format to store multi-level grid information. The grid type determination in the flow field calculation domain is done using the axis aligned bounding box (AABB) triangle overlap test. According to the calculation characteristics of MRT-LBM, the buffer grid is proposed for the first time at the interface of different levels of grids, which is used to remove the temporal interpolation calculation and simplify the spatial interpolation calculation. The corresponding multi-level grid MRT-LBM algorithm is also presented for two-dimensional and three-dimensional flow field calculation problems. For the two-dimensional problem of flow around a circular cylinder, the simulation results show that a four-level grid MRT-LBM proposed in this paper can accurately obtain the aerodynamic coefficients and Strouhal number at different Reynolds numbers, and it has about 1/9 of the total number of grids as a single-level grid MRT-LBM and is 6.76 times faster. For the three-dimensional flow calculation problem, the numerical experiments of flow past a sphere are simulated to verify the numerical precision of the presented method at Reynolds numbers = 100, 200, 250, 300, and 1000. With the streamlines and velocity contours, it is demonstrated that the multi-level grid MRT-LBM can be calculated accurately even at the interface of different size grids.

Suggested Citation

  • Zhixiang Liu & Shengyong Li & Jun Ruan & Wenbo Zhang & Liping Zhou & Dongmei Huang & Jingxiang Xu, 2023. "A New Multi-Level Grid Multiple-Relaxation-Time Lattice Boltzmann Method with Spatial Interpolation," Mathematics, MDPI, vol. 11(5), pages 1-27, February.
    • Handle: RePEc:gam:jmathe:v:11:y:2023:i:5:p:1089-:d:1076554
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    References listed on IDEAS

    as
    1. Yu, Dazhi & Girimaji, Sharath S., 2006. "Multi-block Lattice Boltzmann method: Extension to 3D and validation in turbulence," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 362(1), pages 118-124.
    2. O. Filippova & D. Hänel, 1998. "Boundary-Fitting and Local Grid Refinement for Lattice-BGK Models," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 9(08), pages 1271-1279.
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