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Solutocapillary convection and instability near the air-liquid interface

文献类型：期刊论文

作者Wu ZB(武作兵)1,2
刊名PHYSICS OF FLUIDS
出版日期2024-08-01
卷号36期号:8页码:11
ISSN号1070-6631
DOI10.1063/5.0217686
通讯作者Wu, Zuo-Bing(wuzb@lnm.imech.ac.cn)
英文摘要Steady solutocapillary convection and instability near the air-liquid interface are studied. First, under the assumption of the conically similar viscous flow, an exact axisymmetric solution of the steady solutocapillary convection near the air-liquid interface is determined due to a constant mass flux. It is shown that the constant mass flux and the radial surface tension cause the divergent motion at the interface and the Marangoni convection beneath the interface. Then, the linear stability of the steady solutocapillary convection in response to the azimuthal disturbance is analyzed. At a given Peclet number (or Schmidt number), the steady basic flow loses its stability when the Reynolds number is beyond its critical value. It is found that for the fixed Schmidt number, the critical Reynolds number increases monotonously as the harmonic wave number of the azimuthal disturbance increases. However, for the fixed Peclet number, a nonlinear relationship between the critical Reynolds number and the harmonic wave number of the azimuthal disturbance is found. The structures of iso-concentration lines and velocity fields in the three-dimensional flow system depend on the disturbance harmonic wave number, which is dominated by both the radial and the azimuthal surface tensions. This study provides a profound understanding of the soluble surfactant-driven instability of a divergent flow near the air-liquid interface, which is of great significance for practical applications in the micro-fluidics related to chemistry and biology.
分类号一类/力学重要期刊
WOS关键词INSOLUBLE SURFACTANT ; MARANGONI FLOW
资助项目National Natural Science Foundation of China10.13039/501100001809[11172310] ; National Natural Science Foundation of China10.13039/501100001809[11472284] ; National Natural Science Foundation of China10.13039/501100001809[12272384] ; National Natural Science Foundation of China
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:001292552900009
资助机构National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China
其他责任者Wu, Zuo-Bing
源URL[http://dspace.imech.ac.cn/handle/311007/96361]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 10080, Peoples R China;
推荐引用方式
GB/T 7714		 Wu ZB. Solutocapillary convection and instability near the air-liquid interface[J]. PHYSICS OF FLUIDS,2024,36(8):11.
APA 武作兵.(2024).Solutocapillary convection and instability near the air-liquid interface.PHYSICS OF FLUIDS,36(8),11.
MLA 武作兵."Solutocapillary convection and instability near the air-liquid interface".PHYSICS OF FLUIDS 36.8(2024):11.

入库方式： OAI收割

来源：力学研究所

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