Parallel Optimization for Coupled Lattice Boltzmann-Finite Volume Method on Heterogeneous Many-Core Supercomputer
Source abstract
Abstract
Nowadays various coupling strategies have been developed to combine the strengths of different numerical methods in computational fluid dynamics (CFD), among which the coupled algorithm of the lattice Boltzmann-finite volume method (LBM-FVM) has gained widespread attention. However, research on parallel optimization of LBM-FVM coupled solvers remains limited, mostly focused on independent solvers. In this work, we proposed a flexible framework and optimization schemes to explore the coordinated balance of accuracy-efficiency-hardware adaptability. First, we designed a processor layout strategy to address load imbalance and communication redundancy in the coupled solver. We then developed several parallelization techniques, including LBM restructuring, data reuse, and SIMD optimization for targeted kernels on the most advanced architecture of the Sunway series in China, namely SW26010P heterogeneous many-core processors, which provide hardware architectural advantages well suited for large-scale parallel computational fluid dynamics. Finally, the accuracy of the LBM-FVM coupling simulations was validated through benchmark simulations of 2D/3D lid-driven cavity flow. The results show that our LBM-FVM coupling solver can accurately capture flow characteristics, with vortex structures consistent with experimental data. Additionally, we achieved a 152× speedup for the LBM solver and a 126× speedup for the coupled simulation compared to the standalone FVM simulation on the New Sunway supercomputer system. Our approach marks a milestone in the field of LBM implementations and provides a promising future for coupled algorithms in CFD.
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Research context
OpenAlex topics: Lattice Boltzmann Simulation Studies · Fluid Dynamics and Vibration Analysis · Fluid Dynamics and Heat Transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
China Ship Scientific Research Center, Wuxi 214082, China
National Supercomputing Center in Wuxi, Wuxi 214000, China
CSSC Orient Wuxi Software Technology Co., Ltd., Wuxi 214000, China
Michael Levitt Research Institute for Life Sciences and Digital Convergence, Zhengzhou University of Technology, Zhengzhou 450044, China
Funding
the development and application project of ship CAE software · National Key Research and Development Program of China · Pilot Research Program of WIIRI · Science and Technology Project of Jiangsu Province · Science and Technology Innovation Project of Laoshan Laboratory
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