THE EFFECT OF NONCONDENSABLES ON THE BUOYANCY-THERMOCAPILLARY CONVECTION IN CONFINED AND VOLATILE FLUIDS
THE EFFECT OF NONCONDENSABLES ON THE BUOYANCY-THERMOCAPILLARY CONVECTION IN CONFINED AND VOLATILE FLUIDS
复制标题
密闭挥发性流体中不凝性物质对浮力-热毛细管对流的影响
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
R. Grigoriev
中科院分区：
文献类型：
--
作者：
T. Qin;M. Yoda;R. Grigoriev
在大气条件下，对挥发性液体的封闭层中的对流进行了广泛的研究。最近的实验结果[1]表明，从密封腔中移除大部分空气会显著改变流动结构，特别是抑制在大气条件下发现的不同对流模式之间的转换。然而，同时，这对液体层中的流速几乎没有影响。为了理解这些结果，我们已经制定和数值实现了一个详细的传输模型，占质量和热量在两个阶段，以及在界面处的相变。令人惊讶的是，数值模拟表明，不可冷凝物对浮力-热毛细流动的影响很大，即使浓度低至1%，即，远低于实验中获得的结果。Copyright © 2014 by ASME
Convection in confined layers of volatile liquids has been studied extensively under atmospheric conditions. Recent experimental results [1] have shown that removing most of the air from a sealed cavity significantly alters the flow structure and, in particular, suppresses transitions between the different convection patterns found at atmospheric conditions. Yet, at the same time, this has almost no effect on the flow speeds in the liquid layer. To understand these results, we have formulated and numerically implemented a detailed transport model that accounts for mass and heat transport in both phases as well as the phase change at the interface. Surprisingly, the numerical simulations show that noncondensables have a large effect on buoyancy-thermocapillary flow at concentrations even as low as 1%, i.e., much lower than those achieved in experiment.Copyright © 2014 by ASME