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Effects of very-large scale structures in a high-Reynolds turbulent channel flow on medium-high Prandtl number heat transfer

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.2350
page 7

Yoshinobu Yamamoto
Department of Nuclear Engineering, Kyoto University, Yoshida Sakyo-ku, Kyoto 606-8501,Japan

Tomoaki Kunugi
Department of Nuclear Engineering, Kyoto University, Kyoto Daigaku-Katsura, Nishikyo-ku, Kyoto, Japan

Yoshiyuki Tsuji
KTH Mechanics, Royal Institute of Technology, 100 44 Stockholm, Sweden; Department of Energy Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8503, Japan

Résumé

In this study, effects of very-large scale structures in a High-Reynolds turbulent channel flow up to Reτ=2000 on Medium-high Prandtl number (Pr=5.0) heat transfer were investigated by means of Direct Numerical Simulation (DNS). Temperature very-large scale structures in log-law producted turbulent energy grater than disspation as well as velocity and they might be caused by near wall coherent stuctures orign.

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