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Heat and momentum transfer of turbulent stripe in transitional-regime plane Couette flow

Heat and momentum transfer of turbulent stripe in transitional-regime plane Couette flow Direct numerical simulations using a spectral method of plane Couette flow were performed to clarify the dissimilarity between heat and momentum transport for a turbulent stripe, which is a large-scale intermittent flow structure in a subcritical transitional regime. We compared between the turbulent-stripe regime and a uniform-turbulence regime in terms of variations of turbulent statistics. A dissimilarity between the turbulent heat flux and the Reynolds shear stress was identified in the case of uniform turbulence, while less deviation appeared in the case of the turbulent stripe. The present results imply that more efficient heat transfer relative to the momentum transfer can be expected for the turbulent stripe in comparison to the uniform turbulence. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Advances in Engineering Sciences and Applied Mathematics Springer Journals

Heat and momentum transfer of turbulent stripe in transitional-regime plane Couette flow

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References (32)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Indian Institute of Technology Madras
Subject
Engineering; Engineering, general; Mathematical and Computational Engineering
ISSN
0975-0770
eISSN
0975-5616
DOI
10.1007/s12572-018-0219-8
Publisher site
See Article on Publisher Site

Abstract

Direct numerical simulations using a spectral method of plane Couette flow were performed to clarify the dissimilarity between heat and momentum transport for a turbulent stripe, which is a large-scale intermittent flow structure in a subcritical transitional regime. We compared between the turbulent-stripe regime and a uniform-turbulence regime in terms of variations of turbulent statistics. A dissimilarity between the turbulent heat flux and the Reynolds shear stress was identified in the case of uniform turbulence, while less deviation appeared in the case of the turbulent stripe. The present results imply that more efficient heat transfer relative to the momentum transfer can be expected for the turbulent stripe in comparison to the uniform turbulence.

Journal

International Journal of Advances in Engineering Sciences and Applied MathematicsSpringer Journals

Published: Jun 2, 2018

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