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Transient growth in thermocapillary liquid layers
Hu KX1; Zheng S1; Chen QS(陈启生)2,3
Corresponding AuthorHu, Kai-Xin(hukaixin@nbu.edu.cn)
Source PublicationPHYSICAL REVIEW FLUIDS
2020-01-06
Volume5Issue:1Pages:18
ISSN2469-990X
AbstractThe transient growth in thermocapillary liquid layers is examined by nonmodal stability theory. Two kinds of thermocapillary liquid layers including linear flow and return flow are considered. The transient growth is measured by a growth function, which depends on both the velocity and temperature. It was found that rather large transient growth occurs in subcritical flows at small Prandtl numbers (Pr), while the temperature field on the surface has a negative effect on the transient growth. In particular, the transient growth function increases significantly with the Reynolds number, but decreases with Pr. The most amplified perturbation is characterized by counter-rotating vortices and streaks, which are both nearly streamwise. Energy analysis shows that the energy of transient growth mainly comes from the basic flow, while the work done by Marangoni forces on the surface is negligible.
DOI10.1103/PhysRevFluids.5.014001
Indexed BySCI ; EI
Language英语
WOS IDWOS:000506001600004
WOS KeywordTENSION-DRIVEN CONVECTION ; PLANE COUETTE-FLOW ; FREE-SURFACE ; STABILITY ; INSTABILITY ; FLUID ; GRAVITY ; FILM
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
Funding ProjectNational Natural Science Foundation of China[11872032] ; National Natural Science Foundation of China[U1738119] ; National Natural Science Foundation of China[11532015] ; K. C. Wong Magna Fund in Ningbo University
Funding OrganizationNational Natural Science Foundation of China ; K. C. Wong Magna Fund in Ningbo University
Classification二类
Ranking3
ContributorHu, Kai-Xin
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81243
Collection国家微重力实验室
Affiliation1.Ningbo Univ, Sch Mech Engn & Mech, Key Lab Impact & Safety Engn, Minist Educ, Ningbo 315211, Zhejiang, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Hu KX,Zheng S,Chen QS. Transient growth in thermocapillary liquid layers[J]. PHYSICAL REVIEW FLUIDS,2020,5(1):18.
APA Hu KX,Zheng S,&陈启生.(2020).Transient growth in thermocapillary liquid layers.PHYSICAL REVIEW FLUIDS,5(1),18.
MLA Hu KX,et al."Transient growth in thermocapillary liquid layers".PHYSICAL REVIEW FLUIDS 5.1(2020):18.
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