LES of a turbulent swirl flame using a mesh adaptive level-set method with dynamic load balancing
LES of a turbulent swirl flame using a mesh adaptive level-set method with dynamic load balancing
复制标题
使用具有动态负载平衡的网格自适应水平集方法对湍流旋流火焰进行 LES
DOI:
10.1016/j.compfluid.2021.104900
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发表时间:
2021
影响因子:
2.8
通讯作者:
W. Schröder
中科院分区:
文献类型:
--
作者:
S. Herff;A. Niemöller;M. Meinke;W. Schröder
A turbulent lean premixed swirl flame is numerically investigated by solving the Navier–Stokes equations with a finite-volume large-eddy simulation (LES) method. A combined G-equation progress variable approach is applied to model the combustion process using a solution adaptive level-set solver. The finite-volume and the level-set solver are parallelized and coupled on a joint hierarchical Cartesian mesh, where each solver can individually use and adapt a subset of the mesh cells. The level-set solver adapts the mesh locally in a band close to the flame front location to automatically satisfy the high accuracy requirements of the level-set solution. The numerical results for the turbulent swirl flame are in excellent agreement with experimental findings. Since the flame shape varies during the computation, the number of cells associated with the flame shifts between the individual subdomains which changes the workload distribution on the parallel computing processes. To achieve a high parallel efficiency, a dynamic load balancing method is applied which determines a new partitioning of the grid using estimated cell weights based on measured computing times to redistribute the cells among all subdomains accordingly. The efficiency of the dynamic load balancing scheme to reduce load imbalances is demonstrated for a large-scale simulation of the investigated swirl flame on 170,000 compute cores. That is, the dynamic load balancing scheme reduces the computing time of this simulation by approximately 30%.
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DOI:
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期刊:
影响因子:
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通讯作者:
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