Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow
We analyze the error of large-eddy simulation (LES) in wall pressure fluctuation of a turbulent channel flow. To separate different sources of the error, we conduct both direct numerical simulations (DNS) and LES, and apply an explicit filter on DNS data to obtain filtered DNS (FDNS) data. The error...
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doaj-d59710c1244344198ed6d596b361848f2021-09-09T04:27:39ZengElsevierTheoretical and Applied Mechanics Letters2095-03492021-05-01114100248Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flowRong Li0Bowen Yang1Zixuan Yang2Shizao Wang3Guowei He4State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaState Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding author.State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaState Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaWe analyze the error of large-eddy simulation (LES) in wall pressure fluctuation of a turbulent channel flow. To separate different sources of the error, we conduct both direct numerical simulations (DNS) and LES, and apply an explicit filter on DNS data to obtain filtered DNS (FDNS) data. The error of LES is consequently decomposed into two parts: The first part is the error of FDNS with respect to DNS, which quantifies the influence of the filter operation. The second part is the difference between LES and FDNS induced by the error of LES in velocity field. By comparing the root-mean-square value and the wavenumber-frequency spectrum of the wall pressure fluctuation, it is found that the inaccuracy of the velocity fluctuations is the dominant source that induces the error of LES in the wall pressure fluctuation. The present study provides a basis on future LES studies of the wall pressure fluctuation.http://www.sciencedirect.com/science/article/pii/S2095034921000556Wall pressureLarge-eddy simulationTurbulent channel flow |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rong Li Bowen Yang Zixuan Yang Shizao Wang Guowei He |
spellingShingle |
Rong Li Bowen Yang Zixuan Yang Shizao Wang Guowei He Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow Theoretical and Applied Mechanics Letters Wall pressure Large-eddy simulation Turbulent channel flow |
author_facet |
Rong Li Bowen Yang Zixuan Yang Shizao Wang Guowei He |
author_sort |
Rong Li |
title |
Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow |
title_short |
Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow |
title_full |
Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow |
title_fullStr |
Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow |
title_full_unstemmed |
Error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow |
title_sort |
error of large-eddy simulation in the wall pressure fluctuation of a turbulent channel flow |
publisher |
Elsevier |
series |
Theoretical and Applied Mechanics Letters |
issn |
2095-0349 |
publishDate |
2021-05-01 |
description |
We analyze the error of large-eddy simulation (LES) in wall pressure fluctuation of a turbulent channel flow. To separate different sources of the error, we conduct both direct numerical simulations (DNS) and LES, and apply an explicit filter on DNS data to obtain filtered DNS (FDNS) data. The error of LES is consequently decomposed into two parts: The first part is the error of FDNS with respect to DNS, which quantifies the influence of the filter operation. The second part is the difference between LES and FDNS induced by the error of LES in velocity field. By comparing the root-mean-square value and the wavenumber-frequency spectrum of the wall pressure fluctuation, it is found that the inaccuracy of the velocity fluctuations is the dominant source that induces the error of LES in the wall pressure fluctuation. The present study provides a basis on future LES studies of the wall pressure fluctuation. |
topic |
Wall pressure Large-eddy simulation Turbulent channel flow |
url |
http://www.sciencedirect.com/science/article/pii/S2095034921000556 |
work_keys_str_mv |
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