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首页> 外文期刊>International Journal of Heat and Mass Transfer >Three-dimensional numerical study of turbulent flow and heat transfer in a wavy-walled duct
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Three-dimensional numerical study of turbulent flow and heat transfer in a wavy-walled duct

机译：波纹管内湍流和传热的三维数值研究

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摘要

The present study focuses on the computation of fully developed flow and heat transfer through a stationary wavy-walled duct using large eddy simulation (LES) in finite volume framework. Shear improved Smagorinsky model (SISM) has been used for the computation of eddy viscosity. The wavy-wall is described by the sine function y = 2a sin~2(πx/L). The geometrical ratios H_(min)/H_(max) and L/a are fixed to 0.2 and 8, respectively. The effect of Reynolds numbers (2053-10,000) on the flow field and heat transfer has been presented. Instantaneous, mean and turbulent quantities are reported. It has been observed that the flow is strongly three-dimensional. The friction factor is found to be insensitive to the Reynolds number. Normalized Nusselt number ratio shows significant Reynolds number dependency.
机译：本研究的重点是在有限体积框架内使用大涡模拟（LES）来计算通过固定波浪壁管的充分发展的流动和传热。剪切改进的Smagorinsky模型（SISM）已用于计算涡流粘度。波浪墙由正弦函数y = 2a sin〜2（πx/ L）描述。几何比H_（min）/ H_（max）和L / a分别固定为0.2和8。提出了雷诺数（2053-10,000）对流场和传热的影响。报告了瞬时数量，平均数量和湍流数量。已经观察到，流动是强三维的。发现摩擦系数对雷诺数不敏感。归一化的努塞尔数比显示出显着的雷诺数依赖性。

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