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首页> 外文期刊>Advances in Mechanical Engineering >Dufour and Soret Effects on Square Porous Annulus
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Dufour and Soret Effects on Square Porous Annulus

机译：Dufour和Soret对方形多孔环的影响

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摘要

A study on heat and mass transfer behaviour on porous medium embedded in a square annulus is conducted. The inner surface wall is considered to have a cool temperature T-c. while the outer surface is exposed to a hot temperature T-h. Finite element method (FEM) is used to solve the governing partial differential equations. The results present the influences of the Dufour and Soret effects on the heat and mass transfer of a square annulus. The effects of various physical parameters on the temperature and concentration profiles together with the local Nusselt and Sherwood numbers are presented graphically. It is found that when Dufour parameter is increased, Nusselt number increases. Dufour effect has more influences on velocity profile, while it has no significant effect on the concentration and can be deemed negligible. It is observed that the local Nusselt number is highest at the bottom wall for low values of Dufour parameter; however, the top wall Nusselt number is highest for higher values of Dufour parameter. Soret effect tends to make more significant contribution to the concentration profile than Dufour effect.
机译：对埋在方形环空中的多孔介质的传热和传质行为进行了研究。内表面壁被认为具有凉爽温度T-c。而外表面暴露于高温T-h。有限元方法（FEM）用于求解控制偏微分方程。结果显示了Dufour和Soret效应对方形环的传热和传质的影响。图形显示了各种物理参数对温度和浓度曲线的影响，以及局部的Nusselt和Sherwood数。发现增加Dufour参数时，Nusselt数增加。 Dufour效应对速度分布的影响更大，而对浓度没有显着影响，因此可以忽略不计。可以看到，对于较低的Dufour参数值，本地Nusselt数在底壁处最高。但是，对于较高的Dufour参数值，顶壁Nusselt数最高。 Soret效应比Dufour效应对浓度分布的贡献更大。

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