Thermo- and soluto-capillary convection and instability near the air-liquid interface

doi:10.1063/5.0233428

IMECH-IR > 非线性力学国家重点实验室

	Thermo- and soluto-capillary convection and instability near the air-liquid interface
	Wu ZB(武作兵)1,2
通讯作者	Wu, Zuo-Bing([email protected])
发表期刊	PHYSICS OF FLUIDS
	2024-12-01
卷号	36 期号:12 页码:14
ISSN	1070-6631
摘要	Steady thermo- and solute-capillary convection, instability, and pattern evolution near the air-liquid interface driven by point heat and mass sources are investigated. First, under the assumption of the conically similar viscous flow, an exact axi-symmetric solution of the steady thermo- and soluto-capillary convection near the air-liquid interface is determined due to the constant heat and mass fluxes. It is shown that the constant heat, mass fluxes, 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 thermo- and soluto-capillary convection in response to the azimuthal disturbance is analyzed. At a given Peclet (or Schmidt), Marangoni (or Prandtl), and elasticity numbers, the steady basic flow loses its stability when Reynolds number is beyond the critical value. It is found that for small Schmidt numbers, a half-loop structure between the critical Reynolds number and the harmonic wave number of the azimuthal disturbance appears. For large Schmidt numbers, the critical Reynolds number monotonously increases as the harmonic wave number increases. The critical patterns of the velocity fields and the isothermal, iso-concentration lines in the three-dimensional flow system in response to the disturbance harmonic wave number are dominated by both the radial and azimuthal surface tensions. The results not only provide a valuable understanding of Marangoni convection and pattern information near the air-liquid interface but also inspire its potential practical applications in the material chemistry and biotechnology.
DOI	10.1063/5.0233428
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001368900400002
关键词[WOS]	SURFACE CONTAMINATION ; INSOLUBLE SURFACTANT ; THERMOCAPILLARY FLOW ; PATTERN-FORMATION ; MARANGONI FLOW
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
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
项目资助者	National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Wu, Zuo-Bing
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/97730
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu ZB. Thermo- and soluto-capillary convection and instability near the air-liquid interface[J]. PHYSICS OF FLUIDS,2024,36,12,:14.Rp_Au:Wu, Zuo-Bing
APA	武作兵.(2024).Thermo- and soluto-capillary convection and instability near the air-liquid interface.PHYSICS OF FLUIDS,36(12),14.
MLA	武作兵."Thermo- and soluto-capillary convection and instability near the air-liquid interface".PHYSICS OF FLUIDS 36.12(2024):14.