Direct numerical simulation of a fully developed turbulent channel flow with respect to the Reynolds number dependence
Direct numerical simulation of a fully developed turbulent channel flow with respect to the Reynolds number dependence
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DOI：
10.1115/1.1366680
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发表时间：
2001-06-01
影响因子：
2
通讯作者：
Matsuo, Y
中科院分区：
文献类型：
--
作者：
Abe, H;Kawamura, H;Matsuo, Y
对不同雷诺数下的充分发展的槽道湍流进行了直接数值模拟（DNS），以研究雷诺数依赖性。雷诺数设定为Re-tau = 180、395和640，其中Re-tau是基于摩擦速度和通道半宽的雷诺数。计算采用有限差分法。各种湍流统计，如湍流强度，涡度波动，雷诺应力，他们的预算条款，两点相关系数，和能量谱得到和讨论。本文的结果与湍流边界层和平面Poillonille湍流的DNSs以及槽道流的实验结果进行了比较。封闭模型也测试使用目前的结果的雷诺法向应力的耗散率。此外，瞬时流场的可视化，以检查雷诺数依赖的准相干结构，如涡和条纹。
Direct numerical simulation (DNS) of a fully developed turbulent channel flow for various Reynolds numbers has been carried out to investigate the Reynolds number dependence. The Reynolds number is set to be Re-tau = 180, 395, and 640, where Re-tau is the Reynolds number based on the friction velocity and the channel half width. The computation has been executed with the use of the finite difference method. Various turbulence statistics such as turbulence intensities, vorticity fluctuations, Reynolds stresses, their budget terms, two-point correlation coefficients, and energy spectra are obtained and discussed. The present results are compared with the ones of the DNSs for the turbulent boundary layer and the plane turbulent Poiseuille flow and the experiments for the channel flow. The closure models are also tested using the present results for the dissipation rate of the Reynolds normal stresses. In addition, the instantaneous flow field is visualized in order to examine the Reynolds number dependence for the quasi-coherent structures such as the vortices and streaks.