Int J Adv Eng Sci Appl Math https://doi.org/10.1007/s12572-018-0219-8 IIT, Madras Heat and momentum transfer of turbulent stripe in transitional-regime plane Couette ﬂow 1,2 3 1 • • Koji Fukudome Takahiro Tsukahara Yoshifumi Ogami Indian Institute of Technology Madras 2018 Abstract Direct numerical simulations using a spectral 1 Introduction method of plane Couette ﬂow were performed to clarify the dissimilarity between heat and momentum transport for a The state of turbulence signiﬁcantly enhances the diffusive turbulent stripe, which is a large-scale intermittent ﬂow transports of momentum, heat, and mass (passive material) structure in a subcritical transitional regime. We compared in ﬂuid ﬂows, relative to those in their laminar counter- between the turbulent-stripe regime and a uniform-turbu- parts. In particular, the heat-transfer enhancement is of lence regime in terms of variations of turbulent statistics. A practical importance for many industrial applications such dissimilarity between the turbulent heat ﬂux and the Rey- as heat exchangers, though the hydrodynamic frictional nolds shear stress was identiﬁed in the case of uniform drag also increases due to the similarly-enhanced transport turbulence, while less deviation appeared in the case of the of momentum as both the turbulent momentum and heat turbulent stripe. The present results imply
International Journal of Advances in Engineering Sciences and Applied Mathematics – Springer Journals
Published: Jun 2, 2018
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