Large eddy simulation of channel flows based on IPDG method and subgrid model estimation

被引：0

作者：

Zhao, Ming ^{[1
]}

Xiao, Jiabing ^{[1
]}

Ding, Qiushi ^{[1
]}

Hao, Shixi ^{[1
]}

Chen, Yanan ^{[1
]}

Liu, Wei ^{[2
]}

Liu, Zhengxian ^{[1
]}

机构：

[1] School of Mechanical Engineering, Tianjin University, Tianjin

[2] School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu

来源：

Hangkong Dongli Xuebao/Journal of Aerospace Power | 2025年 / 40卷 / 05期

关键词：

channel flow; interior penalty discontinuous Galerkin（IPDG）; large eddy simulation; subgrid model; subsonic flows;

D O I：

10.13224/j.cnki.jasp.20230693

中图分类号：

学科分类号：

摘要：

Based on the method framework of the high-accuracy interior penalty discontinuous Galerkin (IPDG) finite element，combined with large eddy simulation (LES)，a numerical simulation study was conducted on channel flows. Four different subgrid scale models (Smagorinsky model，Smagorinsky model with Van Driest damping function， wall-adapting local eddy-viscosity （WALE） model， and dynamic model) were employed，and the simulated Mach numbers were 0.2 and 0.7，corresponding to incompressible flow and weak compressible flow， respectively. The results indicated that， within the improved IPDG-LES framework，the Smagorinsky model exhibited lower accuracy due to its excessive dissipation characteristics within the boundary layer. The Smagorinsky model with a dumping function can improve the accuracy but still exhibited excessive viscosity near the wall. The results of WALE model and dynamic models generally outperformed the aforementioned Smagorinsky models and were closer to the reference data，with the dynamic model performing the best overall. Additionally，different models led to similar performances at Mach numbers of 0.2 and 0.7，indicating good adaptability of current IPDG-LES method to weak compressible flows. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

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