Numerical Simulation of Convective Instabilities in a Liquid Layer Submitted to an Inclined Gradient of Temperature
Numerical Simulation of Convective Instabilities in a Liquid Layer Submitted to an Inclined Gradient of Temperature
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DOI：
10.1016/j.egypro.2013.07.043
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
D. Nezar;S. Rahal
中科院分区：
文献类型：
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作者：
D. Nezar;S. Rahal
本文给出了具有上自由面的水平液层中对流不稳定性的数值结果。液层处于倾斜的温度梯度(即水平温度梯度与垂直温度梯度叠加)。普朗特数Pr=102的硅油已被用作工作液。液体层厚度从1.7 mm到3.2 mm变化，以研究重力和表面张力效应对对流型形成的影响。采用GAMBIT网格生成器和基于有限体积法的数值计算程序FLUENT进行了三维数值模拟。所得结果与其他作者的实验结果进行了比较，取得了较好的一致性。这一事实验证了我们的建模和数值模拟程序。
In this paper, numerical results of convective instabilities in a horizontal liquid layer, with an upper free surface, are presented. The liquid layer has been submitted to an inclined gradient of temperature (i.e. a horizontal gradient of temperature superimposed to a vertical one). Silicone oil with a Prandtl number Pr = 102 has been used as a working liquid. The thickness of the liquid layer has been varied from 1.7 mm to 3.2 mm to study the influence of both gravity and surface tension effects on the formation of convective patterns. 3D numerical simulations have been carried out using “Gambit” as a mesh generator and the numerical code “Fluent”, which is based on the finite volume method. The obtained results have been compared to experimental results of other authors and a good agreement has been achieved. This fact allows validating our modelling and numerical simulation procedure.