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首页> 外文期刊>International Journal for Numerical Methods in Fluids >Direct numerical simulation of spanwise rotating turbulent channel flow with heat transfer
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Direct numerical simulation of spanwise rotating turbulent channel flow with heat transfer

机译：带传热的展向旋转湍流通道流动的直接数值模拟

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摘要

Direct numerical simulation of spanwise rotating turbulent channel flow with heat transfer has been performed. The objective of this study is to reveal the effect of system rotation on the characteristics of turbulent flow, heat transfer, and large-scale motions in rotating turbulence. The Reynolds number is 194, the Prandtl number is 0.71, and the rotation number varies from 0 to 7.5, based on the global friction velocity, the channel half-height, and the angular speed of the spanwise rotating channel. To elucidate the effect of rotation on turbulent flow and heat transfer behaviours, some typical statistical quantities, including the mean velocity, temperature and their fluctuations, turbulent heat fluxes, and the structures of the velocity and temperature fluctuations, are analysed. The budget terms in the transport equation of turbulent heat flux are examined to deal with the effect of Coriolis force on turbulent heat transfer. Since rotational-induced Taylor-Gortler-like large-scale counter-rotating streamwise vortices (i.e. the roll cells) occur, the decomposition of the instantaneous temperature variance and turbulent heat flux is used to reveal the role of the rotational-induced structures on the thermal statistics.
机译：已经进行了沿展向旋转的湍流通道传热的直接数值模拟。这项研究的目的是揭示系统旋转对旋转湍流中湍流，传热和大规模运动特性的影响。基于整体摩擦速度，通道半高和翼展方向旋转通道的角速度，雷诺数为194，普朗特数为0.71，转数在0到7.5之间变化。为了阐明旋转对湍流和传热行为的影响，分析了一些典型的统计量，包括平均速度，温度及其波动，湍流通量以及速度和温度波动的结构。检查湍流通量传输方程中的预算项，以处理科里奥利力对湍流传热的影响。由于发生了旋转诱导的泰勒-戈特勒式大规模逆向旋流涡流（即辊腔），因此，瞬时温度变化和湍流热通量的分解被用来揭示旋转诱导结构在管道上的作用。热统计。

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