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The volume ratio effect on flow patterns and transition processes of thermocapillary convection
Kang Q(康琦)1,2; Wang J(王佳)1; Duan L(段俐)1,2; Su YY(苏引引)1; He JW(贺建武)1; Wu D(吴笛)1; Hu WR(胡文瑞)1,2
Source PublicationJOURNAL OF FLUID MECHANICS
2019-06-10
Volume868Pages:560-583
ISSN0022-1120
Abstract

Thermocapillary convection has always been one of the most important research topics in microgravity fluid physics. A space experimental study on the thermocapillary convection in an open annular liquid pool - a typical thermocapillary flow system - has been conducted on the SJ-10 satellite of China. This space experiment has observed the spatial temperature distribution of the liquid free surface using an infrared thermal imager, obtained the flow pattern transition process, analysed the oscillation characteristics and revealed the instability mechanism of themocapillary convection. The shape effects on the flow instability are researched by changing the volume ratio, Vr, which denotes the ratio of the liquid volume to the volume of the cylindrical gap between the walls. The volume ratio effect has been focused on for the first time. For a certain volume ratio, the flow pattern would transform from the steady state to the oscillation state accompanied by directional propagating hydrothermal waves with increasing temperature difference. In addition, the significant influences of the volume ratio on the critical conditions and wavenumber selection have been analysed in detail.

KeywordMarangoni convection pattern formation parametric instability
DOI10.1017/jfm.2019.108
Indexed BySCI ; EI
Language英语
WOS IDWOS:000465317500001
WOS KeywordBUOYANT-THERMOCAPILLARY ; LIQUID LAYERS ; INSTABILITIES ; MICROGRAVITY ; OSCILLATION ; SILICON
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding ProjectStrategic Priority Research Program on Space Science of Chinese Academy of Sciences[XDA04020405] ; Strategic Priority Research Program on Space Science of Chinese Academy of Sciences[XDA04020202-05] ; National Natural Science Foundation of China[U1738116]
Funding OrganizationStrategic Priority Research Program on Space Science of Chinese Academy of Sciences ; National Natural Science Foundation of China
Classification一类/力学重要期刊
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78757
Collection国家微重力实验室
Affiliation1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Kang Q,Wang J,Duan L,et al. The volume ratio effect on flow patterns and transition processes of thermocapillary convection[J]. JOURNAL OF FLUID MECHANICS,2019,868:560-583.
APA Kang Q.,Wang J.,Duan L.,Su YY.,He JW.,...&Hu WR.(2019).The volume ratio effect on flow patterns and transition processes of thermocapillary convection.JOURNAL OF FLUID MECHANICS,868,560-583.
MLA Kang Q,et al."The volume ratio effect on flow patterns and transition processes of thermocapillary convection".JOURNAL OF FLUID MECHANICS 868(2019):560-583.
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