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International Heat Transfer Conference 11

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

DNS AND MODELING OF TURBULENT HEAT TRANSFER IN CHANNEL FLOW WITH VARIOUS PRANDTL NUMBERS

Hiroshi Kawamura
Department of Mechanical Engineering Faculty of Science and Technology Science University of Tokyo Noda-shi, Chiba 278 Japan

Noboru Kawamoto
Department of Mechanical Engineering Faculty of Science and Technology Science University of Tokyo Noda-shi, Chiba 278 Japan

Hiroyuki Abe
Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology 1-2-1 Namiki, Tsukuba 305-8564, Japan

Yuichi Matsuo
Information Technology Center, Japan Aerospace Exploration Agency Jindaiji-higashi, Chofu, Tokyo 182-8522, Japan

Kiyoshi Yamamoto
National Aerospace Laboratory Choufu-shi, Tokyo 182 Japan

DOI: 10.1615/IHTC11.3670
pages 193-198

Abstract

The direct numerical simulation (DNS) of turbulent heat transfer in a two-dimensional channel flow was carried out for various Prandtl numbers ranging from 0.025 to 5.0. The present study is to propose a turbulent heat flux model based on the linearity principle in consideration of the Prandtl number effect and to compare the model with the DNS data. In addition, the instantaneous profiles of the temperature fluctuations and budget terms in the transport equation of the turbulent heat flux are visualized with the use of the DNS results. The effect of the Prandtl number is discussed.

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