Energy mechanism for the instability of liquid jets with thermocapillarity

doi:10.1063/5.0166867

	Energy mechanism for the instability of liquid jets with thermocapillarity
	Sun, YuWen; Hu, KaiXin; Chen QS(陈启生)
刊名	PHYSICS OF FLUIDS
	2023-09-01
卷号	35 期号:9 页码:14
ISSN号	1070-6631
DOI	10.1063/5.0166867
通讯作者	Hu, Kai-Xin(hukaixin@nbu.edu.cn)
英文摘要	Xu and Davis [J. Fluid Mech. 161, 1-25 (1985)] examined the stability of long axisymmetric liquid jet subjected to an axial temperature gradient, finding capillary, surface-wave, and hydrodynamic modes. They showed that capillary breakup can be retarded or even suppressed for a small Prandtl number (Pr< 1) and a large Biot number (Bi >= 1). In the present work, the energy mechanism is carried out for these three kinds of flow instabilities, and the mechanism of suppressing capillary breakup is clarified. When the Reynolds number (R-B) is not large, the work done by the pressure on the free surface (P-S) is the main energy source of the capillary instability. At small Pr and large Bi, the phase difference between the radial velocity and surface deformation increases with R-B, leading to the decrease in P-S, which prevents the occurrence of capillary breakup. Meanwhile, the work done by thermocapillary force becomes the main energy source, making hydrodynamic modes unstable. The perturbation flow fields are displayed, which shows that the temperature fluctuations of three modes differ from each other.
分类号	一类/力学重要期刊
资助项目	National Natural Science Foundation of China[11872032] ; National Natural Science Foundation of China[12372247] ; Zhejiang Provincial Natural Science Foundation[LY21A020006] ; Ningbo Municipality Key Research and Development Program[2022Z213]
WOS关键词	FLOW
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001146152800003
资助机构	National Natural Science Foundation of China ; Zhejiang Provincial Natural Science Foundation ; Ningbo Municipality Key Research and Development Program
其他责任者	Hu, Kai-Xin
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94327]
专题	力学研究所_国家微重力实验室
推荐引用方式 GB/T 7714	Sun, YuWen,Hu, KaiXin,Chen QS. Energy mechanism for the instability of liquid jets with thermocapillarity[J]. PHYSICS OF FLUIDS,2023,35(9):14.
APA	Sun, YuWen,Hu, KaiXin,&陈启生.(2023).Energy mechanism for the instability of liquid jets with thermocapillarity.PHYSICS OF FLUIDS,35(9),14.
MLA	Sun, YuWen,et al."Energy mechanism for the instability of liquid jets with thermocapillarity".PHYSICS OF FLUIDS 35.9(2023):14.