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Effect of skewness on flow and heat transfer characteristics of a wavy channel

机译:偏斜度对波浪形通道的流动和传热特性的影响

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HighlightsEffect of skewness in wavy channels on flow and heat transfer is investigated.Role of secondary flow on heat transfer in skewed wavy channel has been studied.Secondary flow alters synergy between velocity and temperature gradient in domain.Thermodynamic and thermo-hydraulic performance of skewed wavy channel is studied.AbstractThree-dimensional numerical investigations have been carried out to study effect of skewness in wavy channels on flow and heat transfer characteristics. Computations are performed using ANSYS Fluent 16.1 for different values of wave amplitude, skewness angle, Reynolds number (Re) and fixed values of channel width, wavelength. Streamline plots are presented in various planes for different values of skewness angle to understand the flow field characteristics of skewed wavy channels. Volume-averaged as well as span-averaged variation of secondary flow intensity for different skewness angles have been shown to elucidate the strength of induced secondary flow. Effect of secondary flow on heat transfer in skewed wavy channels has been quantified with the help of field synergy angle. Finally, effect of skewness on thermodynamic as well as overall thermo-hydraulic performance of the channel has been presented. Introduction of skewness in the wavy channel induces stronger secondary flow which makes the flow three-dimensional. The stronger secondary flow influences both thermodynamic as well as overall thermo-hydraulic performance of the channel.
机译: 突出显示 研究了波浪形通道中的偏斜度对流动和传热的影响。 二次流在斜波状传热中的作用 二次流改变了域中速度和温度梯度之间的协同作用。 以下各项的热力学和热工液压性能研究了倾斜的波浪通道。 摘要 已进行了三维数值研究,以研究波浪形通道中偏斜度对流动和传热特性的影响。使用ANSYS Fluent 16.1对波振幅,偏斜角,雷诺数( Re )和通道宽度,波长的固定值的不同值进行计算。在不同的偏斜角值的不同平面中显示了流线图,以了解偏斜的波浪通道的流场特性。对于不同的偏斜角,二次流强度的体积平均和跨度平均变化已显示出可阐明诱导二次流的强度。借助于场协同角已经量化了二次流对倾斜的波浪形通道中的热传递的影响。最后,提出了偏斜度对通道的热力学以及整体热工液压性能的影响。在波浪形通道中引入偏斜会引起更强的二次流动,从而使流动成为三维。较强的二次流会影响通道的热力学以及整体热工液压性能。

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