中文版 | English
Title

Quantitative analysis on implicit large eddy simulation

Author
Corresponding AuthorChen,Shiyi
Publication Years
2022-10-01
DOI
Source Title
ISSN
1070-6631
EISSN
1089-7666
Volume34Issue:10
Abstract
Current research conducts the quantitative comparisons between implicit large eddy simulation (iLES) and explicit eddy-viscosity large eddy simulation (eLES). iLES and eLES in a compressible Taylor-Green vortex problem are implemented with a fourth-order finite-volume gas kinetic scheme. Compared with the key statistical quantities of direct numerical simulation, iLES outweighs eLES on the exactly same unresolved grids. With DNS solution, a priori analysis of compressible filtered subgrid-scale (SGS) turbulent kinetic energy ρ ¯ K sgs f is performed. Forward and backward filtered SGS turbulent kinetic energy transfer coexists. The ensemble turbulent kinetic energy Ek is on the order of o (10 4) to o (10 2) of ensemble filtered SGS turbulent kinetic energy K sgs f. The ensemble dominant physical dissipation rate ϵ 1 is approximately 20 times larger than the ensemble filtered SGS dissipation rate - τ i j f S i j f. Then, for iLES and eLES, the total dissipation rate is decomposed into the resolved physical dissipation rate ϵ phy, modeling SGS dissipation rate ϵ sgs mod, and numerical SGS dissipation rate ϵ sgs num. Quantitative comparisons on the modeling SGS dissipation rate and numerical SGS dissipation rate in iLES and eLES are evaluated. The numerical dissipation in iLES can be treated as the built-in SGS dissipation, which accounts for the reasonable performance of iLES. While the explicit modeling SGS dissipation in eLES pollutes the resolved turbulent structures in such low-Reynolds number turbulence. The next generation of large eddy simulation on unresolved grids must take into account both the built-in numerical SGS dissipation and its competition explicit modeling SGS dissipation.
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
Department of Science and Technology of Guangdong Province[2020B1212030001]
WOS Research Area
Mechanics ; Physics
WOS Subject
Mechanics ; Physics, Fluids & Plasmas
WOS Accession No
WOS:000932864200017
Publisher
ESI Research Field
PHYSICS
Scopus EID
2-s2.0-85139839809
Data Source
Scopus
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/406582
DepartmentAcademy for Advanced Interdisciplinary Studies
Affiliation
1.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Guangdong-Hong Kong-Macao Jt. Lab. for Data-Driven Fluid Mechanics and Engineering Applications,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Department of Mechanical and Aerospace Engineering,Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong
First Author AffilicationAcademy for Advanced Interdisciplinary Studies;  Southern University of Science and Technology
Corresponding Author AffilicationAcademy for Advanced Interdisciplinary Studies;  Southern University of Science and Technology
First Author's First AffilicationAcademy for Advanced Interdisciplinary Studies
Recommended Citation
GB/T 7714
Cao,Guiyu,Zhao,Wenjin,Chen,Shiyi. Quantitative analysis on implicit large eddy simulation[J]. PHYSICS OF FLUIDS,2022,34(10).
APA
Cao,Guiyu,Zhao,Wenjin,&Chen,Shiyi.(2022).Quantitative analysis on implicit large eddy simulation.PHYSICS OF FLUIDS,34(10).
MLA
Cao,Guiyu,et al."Quantitative analysis on implicit large eddy simulation".PHYSICS OF FLUIDS 34.10(2022).
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