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A stability condition for turbulence model: From EMMS model to EMMS-based turbulence model
Alternative TitleParticuology
Zhang, Lin1; Qiu, Xiaoping1,2; Wang, Limin1; Li, Jinghai1
2014-10-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume16Issue:OCTPages:142-154
AbstractThe closure problem of turbulence is still a challenging issue in turbulence modeling. In this work, a stability condition is used to close turbulence. Specifically, we regard single-phase flow as a mixture of turbulent and non-turbulent fluids, separating the structure of turbulence. Subsequently, according to the picture of the turbulent eddy cascade, the energy contained in turbulent flow is decomposed into different parts and then quantified. A turbulence stability condition, similar to the principle of the energy-minimization multi-scale (EMMS) model for gas-solid systems, is formulated to close the dynamic constraint equations of turbulence, allowing the inhomogeneous structural parameters of turbulence to be optimized. We name this model as the "EMMS-based turbulence model", and use it to construct the corresponding turbulent viscosity coefficient. To validate the EMMS-based turbulence model, it is used to simulate two classical benchmark problems, lid-driven cavity flow and turbulent flow with forced convection in an empty room. The numerical results show that the EMMS-based turbulence model improves the accuracy of turbulence modeling due to it considers the principle of compromise in competition between viscosity and inertia. (C) 2014 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.; The closure problem of turbulence is still a challenging issue in turbulence modeling. In this work, a stability condition is used to close turbulence. Specifically, we regard single-phase flow as a mixture of turbulent and non-turbulent fluids, separating the structure of turbulence. Subsequently, according to the picture of the turbulent eddy cascade, the energy contained in turbulent flow is decomposed into different parts and then quantified. A turbulence stability condition, similar to the principle of the energy-minimization multi-scale (EMMS) model for gas-solid systems, is formulated to close the dynamic constraint equations of turbulence, allowing the inhomogeneous structural parameters of turbulence to be optimized. We name this model as the "EMMS-based turbulence model", and use it to construct the corresponding turbulent viscosity coefficient. To validate the EMMS-based turbulence model, it is used to simulate two classical benchmark problems, lid-driven cavity flow and turbulent flow with forced convection in an empty room. The numerical results show that the EMMS-based turbulence model improves the accuracy of turbulence modeling due to it considers the principle of compromise in competition between viscosity and inertia. (C) 2014 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.
KeywordStability Condition Mathematical Modeling Turbulence Emms Hydrodynamics Computational Fluid Dynamics
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2014.02.003
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCFD-SIMULATION ; FLOW ; BREAKUP ; SYSTEMS ; DROP ; DRAG
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
WOS IDWOS:000343352700015
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11693
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, EMMS Grp, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Lin,Qiu, Xiaoping,Wang, Limin,et al. A stability condition for turbulence model: From EMMS model to EMMS-based turbulence model[J]. PARTICUOLOGY,2014,16(OCT):142-154.
APA Zhang, Lin,Qiu, Xiaoping,Wang, Limin,&Li, Jinghai.(2014).A stability condition for turbulence model: From EMMS model to EMMS-based turbulence model.PARTICUOLOGY,16(OCT),142-154.
MLA Zhang, Lin,et al."A stability condition for turbulence model: From EMMS model to EMMS-based turbulence model".PARTICUOLOGY 16.OCT(2014):142-154.
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