This paper demonstrates the maintenance of self-sustaining turbulence in a restricted nonlinear (RNL) model of plane Couette flow. The RNL system is derived directly from the Navier-Stokes equations and permits higher resolution studies of the dynamical system associated with the stochastic structural stability theory (S3T) model, which is a second order approximation of the statistical state dynamics of the flow. The RNL model shares the dynamical restrictions of the S3T model but can be easily implemented by reducing a DNS code so that it retains only the RNL dynamics. Comparisons of turbulence arising from DNS and RNL simulations demonstrate that the RNL system supports self-sustaining turbulence with a mean flow as well as structural and dynamical features that are consistent with DNS. These results demonstrate that the simplified RNL system captures fundamental aspects of fully developed turbulence in wall-bounded shear flows and motivate use of the RNL/S3T framework for further study of wall-turbulence.
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October 2014
Research Article|
October 31 2014
Self-sustaining turbulence in a restricted nonlinear model of plane Couette flow
Vaughan L. Thomas;
Vaughan L. Thomas
1Department of Mechanical Engineering,
Johns Hopkins University
, Baltimore, Maryland, 21218, USA
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Binh K. Lieu;
Binh K. Lieu
2Department of Electrical and Computer Engineering,
University of Minnesota
, Minneapolis, Minnesota, 55455, USA
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Mihailo R. Jovanović;
Mihailo R. Jovanović
2Department of Electrical and Computer Engineering,
University of Minnesota
, Minneapolis, Minnesota, 55455, USA
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Brian F. Farrell;
Brian F. Farrell
3School of Engineering and Applied Science,
Harvard University
, Cambridge, Massachusetts, 02138, USA
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Petros J. Ioannou;
Petros J. Ioannou
4Department of Physics,
National and Kapodistrian University of Athens
, Panepistimiopolis, Zografos, Athens, 15784, Greece
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Dennice F. Gayme
Dennice F. Gayme
1Department of Mechanical Engineering,
Johns Hopkins University
, Baltimore, Maryland, 21218, USA
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Physics of Fluids 26, 105112 (2014)
Article history
Received:
February 09 2014
Accepted:
September 24 2014
Citation
Vaughan L. Thomas, Binh K. Lieu, Mihailo R. Jovanović, Brian F. Farrell, Petros J. Ioannou, Dennice F. Gayme; Self-sustaining turbulence in a restricted nonlinear model of plane Couette flow. Physics of Fluids 1 October 2014; 26 (10): 105112. https://doi.org/10.1063/1.4898159
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