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Elastic instability in the thermocapillary convection at low Reynolds numbers
Hu KX(胡凯鑫); Liu R(刘荣); He M; Chen QS(陈启生)
Source PublicationJOURNAL OF NON-NEWTONIAN FLUID MECHANICS
2017-12-01
Volume250Pages:43-51
ISSN0377-0257
Abstract

It is well known that the plane channel flows of UCM and Oldroyd-B fluids are linearly stable at low Reynolds numbers. However, an elastic instability is detected by modal analysis in the thermocapillary convection with straight streamlines. The instability appears when the Weissenberg number is in the order of 1. When the Reynolds number is small enough, the critical Weissenberg number is almost a constant, which only depends on the Marangoni number. The unstable waves include a wide range of wave number and can be streamwise and oblique. The free surface with thermocapillary effect is crucial for the instability, as it induces the normal stress in the basic flow and reduces the constraint on perturbations.

KeywordViscoelastic Elastic Instability Thermocapillary
DOI10.1016/j.jnnfm.2017.10.009
Indexed BySCI ; EI
Language英语
WOS IDWOS:000418215700005
WOS KeywordVISCOELASTIC FLUIDS ; CHANNEL FLOWS ; COUETTE-FLOW ; POLYMER-SOLUTION ; SURFACE-TENSION ; LIQUID BRIDGES ; AMPLIFICATION ; STABILITY ; DISTURBANCES ; LAYERS
WOS Research AreaMechanics
WOS SubjectMechanics
Funding OrganizationNational Science Foundation of China(11402271 ; Ningbo University ; 11532015)
Classification二类/Q1
Ranking3
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72231
Collection国家微重力实验室
Recommended Citation
GB/T 7714
Hu KX,Liu R,He M,et al. Elastic instability in the thermocapillary convection at low Reynolds numbers[J]. JOURNAL OF NON-NEWTONIAN FLUID MECHANICS,2017,250:43-51.
APA 胡凯鑫,刘荣,He M,&陈启生.(2017).Elastic instability in the thermocapillary convection at low Reynolds numbers.JOURNAL OF NON-NEWTONIAN FLUID MECHANICS,250,43-51.
MLA 胡凯鑫,et al."Elastic instability in the thermocapillary convection at low Reynolds numbers".JOURNAL OF NON-NEWTONIAN FLUID MECHANICS 250(2017):43-51.
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