标题：
Effect of Marangoni number on thermocapillary convection in a liquid bridge under microgravity
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所属单位：
航天学院
发表刊物：
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
关键字：
Liquid bridge Marangoni number Thermo-solutal capillary convection Oxygen concentration Convection instability Interlaced vertical bar waves
摘要：
Three dimensional numerical simulations are carried out to investigate the effect of Marangoni number (Ma) on the thermo-solutal capillary convection in a liquid bridge under microgravity. Upper and lower disks of the liquid bridge maintain a constant temperature and solute concentration. The computational results show that two rows of interlaced vertical waves form at the center of the r = 0.5 cm ring surface. The number of the interlaced vertical bar waves increases from 10 to 12 with Ma increase from 3.58 x 10(3) to 5.37 x 10(3), which inferred the enhancement in strength and instability of thermocapillary convection with Ma. On the theta = 0 degrees plane of the liquid bridge, the low concentration of oxygen displays a 'dumbbell shape' at the center. On the z/L = 0.5 plane of the liquid bridge, the oxygen concentration appears an inhomogeneous 'star shape' distribution. Moreover, the concentration and radial segregation effect of oxygen increase with the increment of Ma in floating zone. (C) 2017 Elsevier Masson SAS. All rights reserved.
论文类型：
期刊论文
学科门类：
工学
一级学科：
动力工程及工程热物理
文献类型：
J
ISSN号：
1290-0729
是否译文：
否
发表时间：
2017-08-01
合写作者：
朱桂平,张银
通讯作者：
黄护林
发表时间：
2017-08-01
学位：工学博士学位
职称：教授
所在单位：航天学院