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首页> 外文期刊>International Journal of Engineering Research and Applications >Variable Viscosity and Prandtl Number Effects on Natural Convection Ethanol Boundary Layers about a Vertical Plate
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Variable Viscosity and Prandtl Number Effects on Natural Convection Ethanol Boundary Layers about a Vertical Plate

机译：垂直平板上自然对流乙醇边界层的可变粘度和普朗特数效应

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The aim of this paper is to study the effect of variable viscosity and Prandtl number on the steady, laminar flow (of ethanol) past a vertical porous flat plate. Both viscosity and Prandtl number have been assumed to vary as inverse linear function of temperature. An implicit finite difference method along with the quasilinearization technique has been employed to solve the coupled, parabolic partial differential equations governing the self-similar flow. It is found that variable viscosity and Prandtl number has a key role on the skin friction and heat transfer parameters as well as velocity and temperature fields. Further, it is observed that the effect of variable fluid properties plays a significant role in the control of laminar boundary layer. The present study confirms the fact that when the working fluid is sensitive to the temperature, the influence of variable viscosity and Prandtl number has to be taken into the account in order to visualize the skin friction and heat transfer rate, accurately..
机译：本文的目的是研究可变粘度和普朗特数对通过垂直多孔平板的稳定层流（乙醇）的影响。已经假定粘度和普朗特数均随温度的反线性函数而变化。已采用隐式有限差分法和拟线性化技术来求解控制自相似流的耦合抛物线偏微分方程。发现可变粘度和普朗特数对皮肤摩擦和传热参数以及速度和温度场具有关键作用。另外，观察到可变流体性质的影响在层状边界层的控制中起重要作用。本研究证实了以下事实：当工作流体对温度敏感时，必须考虑可变粘度和普朗特数的影响，以便准确地可视化皮肤摩擦和传热速率。

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