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首页> 外文会议>North American Thermal Analysis Society conference >Forced Convection Heat Transfer Modeling Simulation in the Developing Region of Porous Material Filled Channel for Same Wall Temperature
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Forced Convection Heat Transfer Modeling Simulation in the Developing Region of Porous Material Filled Channel for Same Wall Temperature

机译：相同壁温下多孔材料充填通道发展区域的强迫对流传热建模与仿真

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摘要

Studies on forced convection heat transfer in the developing region of a porous material filled channel subjected to equal temperature at the bottom and top walls have been reported in this paper. The problem has been studied employing Darcy and Brinkman extended non-Darcy flow descriptions. The influences of including axial conduction terms in the energy equation have been examined. The fluid properties are assumed to be constant and porosity to be uniform. Non-dimensional governing equations have been formulated in terms of stream function and temperature when Darcy flow description has been employed and in terms of stream function, Vorticity and temperature in the case of Brinkman extended non-Darcy flow. The porous medium has been applied to control of heat transfer in many ways. It can be used as a turbulence promoter. In order to enhance the effectiveness of the porous medium to improve the heat transfer and to advance the application of porous media to heat storage type heat exchangers, regenerators, filters in sterling engines, it is essential to analyze how the local flow and heat transfer can be controlled by placing a porous medium in a free and forced convection dominant field. For these application in particular, studies in fluid flow and heat transfer in channel are warranted. Studies on forced convective heat transfer in porous media filled channels and pipes conclude that axial conduction leads to an increased in the Nusselt number, dominant at lower Peclet number, whereas non-Darcy effects owing to dominance of brinkman friction lead to a decrease in the Nusselt number becoming increasingly significant as the Peclet number increases.
机译：本文已经报道了在底壁和顶壁受到相同温度的多孔材料填充通道的发展区域中强制对流换热的研究。已使用Darcy和Brinkman扩展的非Darcy流描述研究了该问题。已经研究了在能量方程中包括轴向传导项的影响。假定流体性质是恒定的，孔隙率是均匀的。在采用达西流描述时，已根据流函数和温度以及在Brinkman扩展非达西流的情况下根据流函数，涡度和温度公式化了无量纲控制方程。多孔介质已经以多种方式应用于控制热传递。可以用作湍流促进剂。为了增强多孔介质改善传热的效率，并促进多孔介质在斯特林发动机的储热型热交换器，蓄热室，过滤器中的应用，必须分析局部流动和传热如何实现。通过将多孔介质置于自由对流主导场中进行控制。特别是对于这些应用，必须对通道中的流体流动和传热进行研究。对多孔介质填充的通道和管道中强制对流换热的研究得出结论，轴向传导导致努塞尔特数增加，在较低的Peclet值处占主导地位，而由于布林克曼摩擦力占主导地位而产生的非达西效应导致努塞尔特数减少随着Peclet编号的增加，编号变得越来越重要。

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