Abstract

Current work involves entropy generation studies within nine porous containers involving identical area for Pr_m = 155 (engine oil), $D{a}_m={10}^{-5}-{10}^{-2}$ at $R{a}_m={10}^6.$ The entropy generation maps for lesser values of Da_m depict that $S_{\theta }$ is dominant at the boundaries whereas $S_{\psi }$ is dominant at the central zone. On the other hand, for larger values of Da_m, $S_{\psi }$ is found to be dominant throughout the porous containers. Zones corresponding to $S_{\theta ,\mathit{max}}$ are found at the bottom corners of all porous containers due to the hot cold junction whereas zones corresponding to $S_{\psi ,\mathit{max}}$ vary with the shapes of porous containers. An energy efficient process corresponds to larger $\overline{N{u}_b},$ larger $\widehat{\theta }$ and lesser S_total. Containers with curved walls are found to be thermally efficient for thermal processing of engine oil saturated porous medium.

摘要

目前的工作涉及在Pr _m = 155（发动机油）的相同面积的九个多孔容器内进行熵产生研究，$D{\mathrm{一种}}_{米}={10}^{-5}-{10}^{-2}$ 在 $\mathrm{电阻}{\mathrm{一种}}_{米}={10}^6.$Da _{m 的}较小值的熵生成图描述了${秒}_{\theta }$ 在边界占主导地位，而 ${秒}_{\psi }$在中区占主导地位。另一方面，对于较大的Da _m值，${秒}_{\psi }$发现在整个多孔容器中占主导地位。对应的区域${秒}_{\theta ,\mathit{最大限度}}$ 由于冷热接点，在所有多孔容器的底角都可以找到，而对应的区域为 ${秒}_{\psi ,\mathit{最大限度}}$随多孔容器的形状而变化。一个节能的过程对应于更大的$\overline{N{你}_{乙}},$ 更大 $\widehat{\theta }$和较小的S_总。发现具有弯曲壁的容器对于发动机油饱和多孔介质的热处理具有热效率。