Prandtl number effect on turbulence statistics through high spatial resolution DNS of turbulent heat transfer in a channel flow

被引：0
作者：
Department of Mechanical Engineering, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba, 278 8510, Japan [1 ]
机构：
[1] Department of Mechanical Engineering, Tokyo University of Science, Noda-shi, Chiba, 278 8510
来源：
Nihon Kikai Gakkai Ronbunshu, B | 2006年 / 12卷 / 2856-2861期
关键词：
Channel flow; DNS; Prandtl number effect; Turbulent heat transfer;
D O I：
10.1299/kikaib.72.2856
中图分类号：
学科分类号：
摘要：
Direct numerical simulation of turbulent heat transfer in a channel flow through high spatial resolution has been carried out for Reτ = 180, which is based on the friction velocity and the channel half width. The configuration is a fully developed turbulent channel flow with uniform heat flux heating from both walls. Molecular Prandtl numbers are set to be 0.71, 1.0, 2.0 and 10.0. The Prandtl number effect on the turbulence quantities such as turbulent Prandtl number, skewness and flatness factors of temperature derivatives are examined. Moreover, the resulting one dimensional pre-multiplied energy spectra of temperature fluctuations at large wavenumbers are investigated to confirm the accuracy of the calculation.
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页码：2856 / 2861
页数：5
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