环形液层内热毛细对流的线性稳定性分析  

LINEAR STABILITY ANALYSIS OF THERMOCAPILLARY CONVECTION IN THE ANNULAR POOLS OF SILICONE OIL

作　　者：石万元[1] 李友荣[1] M K Ermakov 今石宣之[3] 

机构地区：[1]重庆大学动力工程学院,重庆400044 [2]俄罗斯科学院力学研究所 [3]日本九州大学先导物质化学研究所

出　　处：《工程热物理学报》2008年第7期1218-1220,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No．50776102)

摘　　要：为了了解液层深度对热毛细对流不稳定性的影响,利用线性稳定性理论分析了内径为20mm、外径为40mm、深度为1～20mm的环形液层内硅油(Pr=6.7)的热毛细对流,重点考察了发生热流体波的临界温差及热流体波的临界周向波数,结果表明,临界温差随液层深度的增加而降低。讨论了浮力对热流体波及其临界条件的影响,并证实了常重力条件下当液层厚度大于5mm时,热流体波呈静止状态这一现象。In order to understand the effect of the liquid layer thickness on the instability of ther- mocapillary convection in the annular pools of silicone oil (Pr=6.7) with inner radius 20 ram,outer radius 40 mm and depth 1～20 mm,the linear stability analysis had been performed.The critical tem- perature differences for the incipience of hydrothermal wave were determined,which decreased with increases of liquid layer thickness.Results indicate that the hydrothermal wave is stationary under gravity condition when t...

关 键 词：热流体波 热毛细对流 线性稳定性分析 不稳定性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]