New scaling of turbulence statistics for incompressible thermal channel flow with different total heat flux gradients

Youhei Morinishi; Shinji Tamano; Eisuke Nakamura

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New scaling of turbulence statistics for incompressible thermal channel flow with different total heat flux gradients

机译：具有不同总热通量梯度的不可压缩热通道流量的湍流统计新标度

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摘要

The scaling of turbulence statistics for wall-bounded thermal turbulent flow with different total heat flux gradients was investigated using direct numerical simulation (DNS) of an incompressible turbulent channel flow with passive scalar transport at the friction Reynolds number of 300 and the Prandtl number of 0.72. DNSs for four cases were performed, where the non-dimensional total heat flux gradients were -1, -0.5, 0 and +0.5. It was revealed that temperature variance and turbulent heat flux were well scaled by the local friction temperature. In addition, using the linear stress-heat flux model, it was shown that the appearance of the logarithmic temperature profile was attributed to the distribution of the turbulent Prandtl number.

机译：采用直接数值模拟（DNS），研究了具有被动标量传输的不可压缩湍流通道流在摩擦雷诺数为300和普朗特数为0.72时的直接数值模拟（DNS），研究了具有不同总热通量梯度的壁边界热湍流的湍流统计量的标度。进行了四种情况的DNS，其中无量纲总热通量梯度为-1，-0.5、0和+0.5。结果表明，温度变化和湍流热通量被局部摩擦温度很好地标度。另外，使用线性应力-热通量模型，表明对数温度曲线的出现归因于湍流普朗特数的分布。

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来源
《International Journal of Heat and Mass Transfer》 |2007年第10期|p.1781-1789|共9页
作者
Youhei Morinishi; Shinji Tamano; Eisuke Nakamura;
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作者单位

Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类热力工程理论;热学;
关键词
direct numerical simulation; thermal channel flow; total heat flux gradient; local friction temperature; linear stress-heat flux model;

机译：直接数值模拟热通道流动总热通量梯度局部摩擦温度线性应力热通量模型;

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New scaling of turbulence statistics for incompressible thermal channel flow with different total heat flux gradients

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