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The Effect of Helicity on Kinetic Energy Cascade in Compressible Helical Turbulence
Yan Z(闫政); Li XL(李新亮); Fu YW(符耀威); Yu ZP(于长平)
Source PublicationADVANCES IN APPLIED MATHEMATICS AND MECHANICS
2019-06-01
Volume11Issue:3Pages:700-710
ISSN2070-0733
Abstract

Helicity plays an important role in the nonlinear dynamic process of compressible helical turbulence. We carry out direct numerical simulations (DNS) of compressible helical turbulence with different mean helicity at the grid resolution of 512(3) and try to explore the physical mechanism of kinetic energy cascade under the effect of helicity. The filtering method of coarse-graining is employed for scale decomposition to get kinetic energy flux. We get some novel conclusions in contrast to pre-existing knowledge in incompressible helical turbulence. Firstly, helicity also hinders the process of compressible kinetic energy cascade and reduces viscous dissipation. Secondly, helicity weakens some exclusive features, such as coupling between compressible and solenoidal mode of fluctuating velocity, energy transformation between kinetic energy and internal energy, and shocklets which appear only in compressible turbulence and serves as the role of constraint.

KeywordHelicity direct numerical simulations kinetic energy cascade
DOI10.4208/aamm.2018.s13
Indexed BySCI
Language英语
WOS IDWOS:000456198100014
WOS KeywordISOTROPIC TURBULENCE ; NONLINEARITY ; DEPRESSION
WOS Research AreaMathematics, Applied ; Mechanics
WOS SubjectMathematics ; Mechanics
Funding OrganizationChinese Academy of Sciences [XDA17030100] ; NSFC [91852203, 11472278] ; National Key Research and Development Program of China [2016YFA0401200] ; Science Challenge Project [TZ2016001]
ClassificationQ4
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78444
Collection高温气体动力学国家重点实验室
Corresponding AuthorYu ZP(于长平)
Affiliation1.{Yan, Zheng、Li, Xinliang、Fu, Yaowei、Yu, Changping} Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China
2.{Yan, Zheng、Li, Xinliang、Fu, Yaowei、Yu, Changping} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yan Z,Li XL,Fu YW,et al. The Effect of Helicity on Kinetic Energy Cascade in Compressible Helical Turbulence[J]. ADVANCES IN APPLIED MATHEMATICS AND MECHANICS,2019,11(3):700-710.
APA Yan Z,Li XL,Fu YW,&Yu ZP.(2019).The Effect of Helicity on Kinetic Energy Cascade in Compressible Helical Turbulence.ADVANCES IN APPLIED MATHEMATICS AND MECHANICS,11(3),700-710.
MLA Yan Z,et al."The Effect of Helicity on Kinetic Energy Cascade in Compressible Helical Turbulence".ADVANCES IN APPLIED MATHEMATICS AND MECHANICS 11.3(2019):700-710.
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