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首页> 外文期刊>Journal of Heat Transfer >Forced Convection in High Porosity Metal Foams
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Forced Convection in High Porosity Metal Foams

机译：高孔隙率金属泡沫中的强制对流

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This paper reports an experimental and numerical stud of forced convection in high porosity (ε～0.89-0.097) metal foams. Experiments have been conducted with aluminum metal foams in a variety of porosities and pore densities using air as the fluid medium. Nusselt number data has been obtained as a function of the pore Reynolds number. In the Numerical study, a semi-empirical volume-averaged form of the governing equations is Used. The velocity profile is obtained by adapting an exact solution to the momentum Equation. The energy transport is modeled without invoking the assumption of local thermal equilibrium. Models for the thermal dispersion conductivity, k_d, and the inter- Stitial heat transfer coefficient, h_sf, are postulated based on physical arguments. The Empirical constants in these models are determined by matching the numerical results With the experimental data obtained in this study as well as those in the open literature. Excellent agreement is achieved in the entire range of the parameters studied, indicating That the proposed treatment is sufficient to model forced convection in metal foams for most practical applications.
机译：本文报道了在高孔隙率（ε〜0.89-0.097）金属泡沫中强迫对流的实验和数值研究。已经使用空气作为流体介质对具有各种孔隙率和孔隙密度的铝泡沫金属进行了实验。已经获得了作为孔雷诺数的函数的Nusselt数数据。在数值研究中，使用了控制方程的半经验体积平均形式。通过使精确解适应动量方程获得速度分布。在不调用局部热平衡假设的情况下对能量传输进行建模。根据物理参数推定了热扩散系数k_d和内部热传递系数h_sf的模型。这些模型中的经验常数是通过将数值结果与本研究以及公开文献中获得的实验数据进行匹配来确定的。在所研究的整个参数范围内均取得了优异的一致性，表明对于大多数实际应用而言，所提出的处理方法足以对金属泡沫中的强制对流建模。

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