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Response of turbulent enstrophy to sudden implementation of spanwise wall oscillation in channel flow
Ge MW; Jin GD(晋国栋)
Source PublicationAPPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
2017-08-01
Volume38Issue:8Pages:1159-1170
ISSN0253-4827
Abstract

The response of turbulent enstrophy to a sudden implementation of spanwise wall oscillation (SWO) is studied in a turbulent channel flow via direct numerical simulation. In the beginning of the application of SWO, a significant correlation is formed between omega (y) (') and omega (z) (') . A transient growth of turbulent enstrophy occurs, which directly enhances turbulent dissipation and drifts the turbulent flow towards a new lower-drag condition. Afterwards, the terms related to the stretching of vorticity (omega (x) , omega (y) (') , and omega (z) ), the inclination of omega (y) (') by , the turn of omega I" (z) by , and the horizontal shear of omega I" (z) by are suppressed due to the presence of SWO, leading to attenuation of the turbulent enstrophy.

KeywordTurbulent Channel Flow Transport Of Enstrophy Drag Reduction Spanwise Wall Oscillation (Swo)
DOI10.1007/s10483-017-2226-9
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000404749900008
WOS KeywordDirect Numerical-simulation ; Drag-reduction Mechanisms ; Boundary-layer Control ; Surfaces ; Riblets ; Motion
WOS Research AreaMathematics ; Mechanics
WOS SubjectMathematics, Applied ; Mechanics
Funding OrganizationNational Natural Science Foundation of China(11402088 ; State Key Laboratory of Nonlinear Mechanics ; Fundamental Research Funds for the Central Universities(2107MS022) ; 51376062)
CSCD IDCSCD:6063749
DepartmentLNM湍流
Classification二类
Ranking2
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60901
Collection非线性力学国家重点实验室
Corresponding AuthorGe MW
Recommended Citation
GB/T 7714
Ge MW,Jin GD. Response of turbulent enstrophy to sudden implementation of spanwise wall oscillation in channel flow[J]. APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION,2017,38(8):1159-1170.
APA Ge MW,&Jin GD.(2017).Response of turbulent enstrophy to sudden implementation of spanwise wall oscillation in channel flow.APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION,38(8),1159-1170.
MLA Ge MW,et al."Response of turbulent enstrophy to sudden implementation of spanwise wall oscillation in channel flow".APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 38.8(2017):1159-1170.
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