Abstract The aim of this article is to understand numerically the flow and heat transfer characteristics under oscillating flow conditions for periodically corrugated wavy channel. For the same channel, under steady-state flow conditions, experimental and numerical studies were done under steady-state flow conditions by our two previous studies. Three turbulence models are used, namely the k–ω, the Shear Stress Transport (SST), and the transition SST. According to the previous study, the best agreement with experiments was obtained using the SST turbulence model. Therefore, the SST turbulence model is applied in this study on the oscillating flow. The finite volume method is used as the numerical method. Investigations are performed for air flowing through corrugated channel which has sharp wavy peaks with an inclination angle of 30° and 5 mm minimum channel height. Reynolds number is varied within the range 6294–7380, while keeping the Prandtl number constant at 0.70. Four different sinusoidal oscillating flow conditions are used. Variations of the Nusselt number, friction factor, and thermo-hydraulic performance factor with the Reynolds number are studied.

中文翻译：

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振荡波纹通道流动对流换热和摩擦系数的数值分析

摘要 本文旨在从数值上理解周期性波纹波状通道在振荡流动条件下的流动和传热特性。对于同一通道，在稳态流动条件下，我们之前的两项研究在稳态流动条件下进行了实验和数值研究。使用了三种湍流模型，即 k-ω、剪切应力传递 (SST) 和过渡 SST。根据之前的研究，使用 SST 湍流模型获得了与实验的最佳一致性。因此，本文采用 SST 湍流模型对振荡流进行研究。有限体积法用作数值方法。对流经波纹通道的空气进行了调查，该通道具有倾斜角为 30° 且最小通道高度为 5 mm 的尖锐波浪峰。雷诺数在 6294-7380 范围内变化，同时保持普朗特数恒定在 0.70。使用了四种不同的正弦振荡流条件。研究了努塞尔数、摩擦系数和热工水力性能系数随雷诺数的变化。