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首页> 外文期刊>Transport in Porous Media >Mixed Convection Boundary-Layer Flow Over a Vertical Surface Embedded in a Porous Material Subject to a Convective Boundary Condition
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Mixed Convection Boundary-Layer Flow Over a Vertical Surface Embedded in a Porous Material Subject to a Convective Boundary Condition

机译:在对流边界条件下嵌入多孔材料的垂直表面上的混合对流边界层流

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摘要

The mixed convection boundary-layer flow on one face of a semi-infinite vertical surface embedded in a fluid-saturated porous medium is considered when the other face is taken to be in contact with a hot or cooled fluid maintaining that surface at a constant temperature (T_mathrm{{f}}). The governing system of partial differential equations is transformed into a system of ordinary differential equations through an appropriate similarity transformation. These equations are solved numerically in terms of a dimensionless mixed convection parameter (epsilon ) and a surface heat transfer parameter (gamma ). The results indicate that dual solutions exist for opposing flow, (epsilon <0), with the dependence of the critical values (epsilon _mathrm{{c}}) on (gamma ) being determined, whereas for the assisting flow (epsilon >0), the solution is unique. Limiting asymptotic forms for both (gamma ) small and large and (epsilon ) large are also discussed.
机译:当嵌入另一半无限垂直表面的一个表面上的混合对流边界层流被认为是饱和的,该半无限垂直表面的一个表面与流体饱和的多孔介质中的另一面接触时,该表面与热或冷却的流体保持接触(T_mathrm {{f}})。通过适当的相似性变换,将偏微分方程的控制系统转换为常微分方程的系统。这些方程根据无量纲混合对流参数(ε)和表面传热参数(γ)进行数值求解。结果表明存在对流(epsilon <0)的双重解,其中确定了临界值(epsilon _mathrm {{c}})对(γ)的依赖性,而对于辅助流(epsilon> 0) ,解决方案是独特的。还讨论了(伽玛)小和大和(ε)大的极限渐近形式。

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