环形浅液池内热毛细对流的热力学特性

工程热物理学报 , 2006, 27(2): 193-195.

环形浅液池内热毛细对流的热力学特性

李友荣 ^1, , 唐经文 ^2, , 黄旭方 ^3, , 曾丹苓 ^4,

1.重庆大学动力工程学院,重庆,400044

2.重庆大学动力工程学院,重庆,400044

3.重庆大学动力工程学院,重庆,400044

4.重庆大学动力工程学院,重庆,400044

基金项目: 中国科学院资助项目(50476042) 教育部留学基金(教外司留[2003]406-2)

关键词：环形液池 , 热毛细对流 , 数值模拟 , 熵产

THERMODYNAMIC CHARACTERISTICS OF THERMOCAPILLARY CONVECTION IN A SHALLOW ANNULAR POOL

为了了解径向温度梯度作用下环形浅液池内硅熔体热毛细对流的热力学特性,利用有限差分法进行了非稳态三维数值模拟.液池外半径ro=50 mm,内半径ri=15 mm,深度为d=3 mm.结果表明,当温度梯度较小时,流动为稳定轴对称流动,系统总熵产较小;随着温度梯度的增加,流动将失去其稳定性,首先转化为径向脉动波,此时系统总熵产呈周期性变化;温度梯度再增加时,流动转化为热流体波,系统总熵产较大,但不再随时间变化.

参考文献

[1]	Hu W R;Imaishi N .Thermocapillary Flow in an Annular Liquid Layer Painted on a Moving Fiber[J].International Journal of Heat and Mass Transfer,2003,43(23):4457-4466.
[2]	Shih T;Megaridis C M .Thermocapillary Flow Effects on Convective Droplet Evaporation[J].International Journal of Heat and Mass Transfer,1996,39(02):247-257.
[3]	Chang C E;Wilcox W R .Analysis of Surface Tension Driven Flow in Floating Zone Melting[J].International Journal of Heat and Mass Transfer,1976,19(02):355-366.
[4]	Smith M K;Davis S H .Instabilities of Dynamic Thermocapillary Liquid Layers.Part 1.Convective Instabilities[J].Journal of Fluid Mechanics,1983,132:119-144.
[5]	Kamotani Y .Thermocapillary Flow under MicrogravityExperimental Results[J].Advances in Space Research,1999,24(10):1357-1366.
[6]	Schwabe D;Moller U;Schneider J et al.Instabilities of Shallow Dynamic Thermocapillary Liquid Layers[J].Physics of Fluids A Fluid Dynamics,1992,4(11):2368-2381.
[7]	Schwabe D.;Zebib A.;Sim BC. .Oscillatory thermocapillary convection in open cylindrical annuli. Part 1. Experiments under microgravity[J].Journal of Fluid Mechanics,2003(0):239-258.
[8]	N. Garnier;A. Chiffaudel .Two dimensional hydrothermal waves in an extended cylindrical vessel[J].The European physical journal, B. Condensed matter physics,2001(1):87-95.
[9]	Sim BC.;Zebib A.;Schwabe D. .Oscillatory thermocapillary convection in open cylindrical annuli. Part 2. Simulations[J].Journal of Fluid Mechanics,2003(0):259-274.
[10]	You-Rong Li;Lan Peng;Yasunobu Akiyama;Nobuyuki Imaishi .Three-dimensional numerical simulation of thermocapillary flow of moderate Prandtl number fluid in an annular pool[J].Journal of Crystal Growth,2003(4):374-387.
[11]	You-Rong Li;Nobuyuki Imaishi;Takeshi Azami;Taketoshi Hibiya .Three-dimensional oscillatory flow in a thin annular pool of silicon melt[J].Journal of Crystal Growth,2004(1/2):28-42.

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环形浅液池内热毛细对流的热力学特性

THERMODYNAMIC CHARACTERISTICS OF THERMOCAPILLARY CONVECTION IN A SHALLOW ANNULAR POOL

参考文献