Numerical Investigation of Thermocapillary Convection in a Liquid Layer with Free Surface

Numerical Investigation of Thermocapillary Convection in a Liquid Layer with Free Surface
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自由表面液层中热毛细管对流的数值研究

DOI:
10.1007/s12217-014-9361-5
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发表时间:
2014-04
影响因子:
1.8
通讯作者:
Xiulan Huai
Xiulan Huai
中科院分区:
工程技术4区
文献类型:
--
作者:
Xiaoming Zhou;Xiulan Huai

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采用水平集方法捕捉自由表面变形,数值研究了Marangoni数、长宽比和重力水平对液层热毛细对流的影响。计算结果表明,随着Marangoni数的增大,自由面变形增大,当Marangoni数足够大时,自由面变形会导致自由面破裂。端壁对自由表面变形有阻尼作用,随着高宽比(A =L/(0.5H))的减小,自由表面变形能力减小。重力对自由面变形有一定的抑制作用,特别是当重力水平从0.0001g0变化到g 0时,自由面变形能力急剧下降。
Effects of Marangoni number, aspect ratio and gravity level on thermocapillary convection in a liquid layer is investigated numerically, in which the level set method is employed to capture free surface deformation. The computational results show that, with the increase of Marangoni number the free surface deformation is increased and it can lead to free surface rupture if the Marangoni number is large enough. The end walls has a damping effect on the free surface deformation, and as the aspect ratio (A =L/(0.5H)) decreases the deformability of free surface is reduced. The gravity can damp the free surface deformation, particularly as gravity level varies from 0.0001g0to g0the free surface deformability decreases steeply.
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