On the self-constraint mechanism of the cross-stream secondary flow in a streamwise-rotating channel

Zixuan Yang; Bingqing Deng; B. C. Wang; L. Shen

doi:10.1063/5.0023695

On the self-constraint mechanism of the cross-stream secondary flow in a streamwise-rotating channel

Zixuan Yang, Bingqing Deng, B. C. Wang, L. Shen

St. Anthony Falls Laboratory

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7 Scopus citations

Abstract

The mechanism underlying the magnitude-reverse phenomenon of the mean spanwise velocity with respect to an increasing rotation number in a streamwise-rotating channel flow is investigated through a budget balance analysis of Reynolds shear stress u2′u3′. It is found that u2′u3′»imposes a negative feedback to itself through the production term, which prevents its magnitude from increasing monotonically with an increasing rotation number. This behavior of u2′u3′»further leads to the magnitude reverse in the spanwise wall shear stress and mean spanwise velocity in the near-wall region.

Original language	English (US)
Article number	105115
Journal	Physics of Fluids
Volume	32
Issue number	10
DOIs	https://doi.org/10.1063/5.0023695
State	Published - Oct 1 2020

Bibliographical note

Funding Information:
Z.Y. would like to thank the support of the NSFC Basic Science Center Program for “Multiscale Problems in Nonlinear Mechanics” (Grant No. 11988102) and the Lixing research funding of Institute of Mechanics, Chinese Academy of Sciences. The DNS database was established under the support of the Natural Sciences and Engineering Research Council (NSERC) of Canada to B.-C.W.

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© 2020 Author(s).

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title = "On the self-constraint mechanism of the cross-stream secondary flow in a streamwise-rotating channel",

abstract = "The mechanism underlying the magnitude-reverse phenomenon of the mean spanwise velocity with respect to an increasing rotation number in a streamwise-rotating channel flow is investigated through a budget balance analysis of Reynolds shear stress u2′u3′. It is found that u2′u3′»imposes a negative feedback to itself through the production term, which prevents its magnitude from increasing monotonically with an increasing rotation number. This behavior of u2′u3′»further leads to the magnitude reverse in the spanwise wall shear stress and mean spanwise velocity in the near-wall region. ",

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On the self-constraint mechanism of the cross-stream secondary flow in a streamwise-rotating channel

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