The liquid metal, as the liquid first wall in the reactor, together with the high toroidal magnetic field, is propelled by electrodynamic force, which would cause the liquid metal free surface splashing and threaten the security and stability of the fusion reactor. In this paper, we use the capillary porous channel structure. It increases the contact area of the liquid metal with the wall, so that adhesion increases. It has an additional surface tension, which greatly reduces the wetting resistance and electromagnetic force, achieving the effect of suppression of splash. Liquid metal surface control can be improved by enhancement of surface wettability and the proper choice of liquid metal surface structure. The experiments are carried out in order to understand the causes and consequences of ejected liquid metal as well as to investigate the effects of surface structures on the ejection process.
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