Title: Turbulent heat transfer of viscoelastic fluid flow accompanied by drag reduction with DNS analysis

Authors: Yuta Kagawa, Bo Yu, Yasuo Kawaguchi, Hiroshi Kawamura, Yuya Shiraishi

Addresses: Department of Mech. Eng., Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan. ' Department of Petroleum Storage and Transportation, Beijing University of Petroleum, Changping, Beijing 102200, China. ' Department of Mech. Eng., Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan. ' Department of Mech. Eng., Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan. ' Department of Advanced Energy, Graduate School of Frontier Science, The Univ. of Tokyo, Komurasaki Lab., 5-1-5, Kashiwa-no-ha, Kashiwa-shi, Chiba, 277-8561, Japan

Abstract: It is well known that turbulent drag can be reduced effectively by adding a small amount of water-soluble polymer or surfactant to a liquid flow at high Reynolds number. However, the heat transfer of drag-reducing flow is deteriorated, thought to be approximately in accordance with the drag reduction because of the similarity of momentum and heat transfer. In this study, turbulent heat transfer of drag-reducing in a channel flow with DNS was carried out to investigate the dissimilarity behaviour between heat transfer and friction of a viscoelastic drag-reducing flow by surfactant additives. The effect of rheological parameters was carefully investigated to find the conditions at which the dissimilarity between heat and mass appears.

Keywords: turbulent heat transfer; viscoleastic fluids; fluid flow; drag reduction; momentum; DNS; channel flow; rheology; turbulent drag; turbulence; surfactant additives; friction; direct numerical simulation.

DOI: 10.1504/PCFD.2008.021325

Progress in Computational Fluid Dynamics, An International Journal, 2008 Vol.8 No.7/8, pp.477 - 485

Published online: 19 Nov 2008 *

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