NDLI: Structural ensemble dynamics based closure model for wall-bounded turbulent flow

Content Provider	Springer Nature Link
Author	She, Zhen Su Hu, Ning Wu, You
Copyright Year	2009
Abstract	Wall-bounded turbulent flow involves the development of multi-scale turbulent eddies, as well as a sharply varying boundary layer. Its theoretical descriptions are yet phenomenological. We present here a new framework called structural ensemble dynamics (SED), which aims at using systematically all relevant statistical properties of turbulent structures for a quantitative description of ensemble means. A new set of closure equations based on the SED approach for a turbulent channel flow is presented. SED order functions are defined, and numerically determined from data of direct numerical simulations (DNS). Computational results show that the new closure model reproduces accurately the solution of the original Navier–Stokes simulation, including the mean velocity profile, the kinetic energy of the streamwise velocity component, and every term in the energy budget equation. It is suggested that the SED-based studies of turbulent structure builds a bridge between the studies of physical mechanisms of turbulence and the development of accurate model equations for engineering predictions.
Starting Page	731
Ending Page	736
Page Count	6
File Format	PDF
ISSN	05677718
Journal	Acta Mechanica Sinica
Volume Number	25
Issue Number	5
e-ISSN	16143116
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-08-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Turbulence Closure equation Channel flow Structural ensemble dynamics Computational Intelligence Engineering Fluid Dynamics Classical Continuum Physics Theoretical and Applied Mechanics
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Computational Mechanics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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