WHAT CAN WE LEARN ABOUT TRANSPORT PHENOMENA FROM A STUDY OF CRITICAL FLUIDS IN MICROGRAVITY

被引:0
|
作者
BEYSENS, D
机构
来源
ANNALES DE CHIMIE-SCIENCE DES MATERIAUX | 1992年 / 17卷 / 01期
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中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Pure fluids and liquid mixtures near their critical point (gas-liquid, liquid-liquid) happen to be good candidates to put in evidence the mechanisms that are most often hidden on Earth by gravity-induced convective phenomena. The properties of fluids in their critical region can indeed be put under a universal form (scaling laws) within a large-domain of temperature and pressure. We discuss two recent results that were obtained during a sounding rocket flight. One of them is concerned with the observation of a very rapid thermalization process due to the expansion of a boundary layer ("Piston Effect") and the other involves the growth of domains during phase separation that appears to be dominated by capillary flows.
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页码:45 / 53
页数:9
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