2D numerical simulations of liquid tin film flows with heat flux on free surface under a perpendicular magnetic field

doi:10.7523/j.issn.2095-6134.2021.06.004

Abstract

Abstract: With capacities of self-cleaning and sustaining high heat load, liquid-metal divertor is one important design of first wall component. Liquid-metal divertor has to be faced with external magnetic fields and high-intensity heat flux, and in devices, existence of low-frequency disturbances is inevitable, which would make liquid-metal film flows develop into capillary solitary waves, in which capillary separation eddies at wave troughs would strengthen heat convection there. In this research, heat transportation of liquid-tin film flows with capillary solitary waves is studied under Re=58. When there is no magnetic field and free-surface heat flux, capillary solitary waves of liquid tin have same features of water waves and Nu number also reaches peak at wave trough. When only applying magnetic field is exerted, Lorentz force has damping effects on waves and accordingly, the enhancement of heat transfer from capillary separation eddies decreases. When only applying free-surface heat flux is exerted, film flows are heated and distribution of Nu number become more uniform. When applying both magnetic field and heat flux are exerted, their effects will be stacked.

Key words: liquid metal, capillary solitary waves, heat flux on free surface, magneto-hydrodynamics, divertor

CLC Number:

O361.3

ZHUO Qihao, PAN Junhua, NI Mingjiu. 2D numerical simulations of liquid tin film flows with heat flux on free surface under a perpendicular magnetic field[J]. Journal of University of Chinese Academy of Sciences, 2021, 38(6): 741-749.

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