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) | |
刊名 | JOURNAL OF NON-NEWTONIAN FLUID MECHANICS |
2017-12-01 | |
卷号 | 250页码:43-51 |
关键词 | Viscoelastic Elastic Instability Thermocapillary |
ISSN号 | 0377-0257 |
DOI | 10.1016/j.jnnfm.2017.10.009 |
文献子类 | Article |
英文摘要 | 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. |
分类号 | 二类/Q1 |
WOS关键词 | VISCOELASTIC FLUIDS ; CHANNEL FLOWS ; COUETTE-FLOW ; POLYMER-SOLUTION ; SURFACE-TENSION ; LIQUID BRIDGES ; AMPLIFICATION ; STABILITY ; DISTURBANCES ; LAYERS |
WOS研究方向 | Mechanics |
语种 | 英语 |
WOS记录号 | WOS:000418215700005 |
资助机构 | National Science Foundation of China(11402271 ; Ningbo University ; 11532015) |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/72231] |
专题 | 力学研究所_国家微重力实验室 |
推荐引用方式 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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