Turbulence statistics in a fully developed rotating pipe flow
Turbulence statistics in a fully developed rotating pipe flow
复制标题
充分发展的旋转管流中的湍流统计
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Lauriat
中科院分区：
文献类型：
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作者：
A. Feiz;M. Ould;G. Lauriat
本文介绍了轴向旋转管道中充分发展的湍流的直接数值模拟 (DNS)。该研究旨在研究雷诺数和旋转数对湍流特性的影响。将平均速度分布和统计数据与文献中可用的数值和实验数据进行比较，并获得相当好的一致性。特别是，结果表明，由于离心力引起的稳定性效应，随着转速的增加，轴向速度分布逐渐接近层流形状。因此，摩擦系数降低。为了更好地理解这种复杂流动的行为并研究更高雷诺数的影响，我们还进行了大涡模拟（LES）。
This paper presents Direct Numerical Simulations (DNS) of fully developed turbulent flows in axially rotating pipes. The study is aimed at investigation of the effects of the Reynolds number and of the rotation number on turbulent flow characteristics. The mean velocity profiles and the statistics are compared to numerical and experimental data available in the literature, and reasonably good agreement is obtained. In particular, the results show that the axial velocity profile gradually approaches a laminar shape when increasing the rotation rate, due to the stability effect caused by the centrifugal force. Consequently, the friction factor decreases. To have a better understanding of the behavior of this kind of complex flows and to investigate the effects of higher Reynolds numbers, we have also carried out Large Eddy Simulations (LES).