A fixed construction slosh baffle arranged in the whole tank was designed for a large cryogenic tank based on the horizontal ring slosh baffle and vertical slosh baffle. The effects of this slosh baffle at different fill levels were simulated numerically

using CFD software Flow-3D under a harmonic excitation. Comparisons with a horizontal ring slosh baffle at the liquid surface show that the effects of these two baffles are similar

both of them can significantly reduce the wave range of the center of liquid mass at different fill levels. The wave range can even be decreased by 64% at 50% fill level. During the slosh

the pressure imposed on the single board of the fixed construction slosh baffle is smaller than that of horizontal ring slosh baffle at the liquid surface

while the tank wall of the former undergoes higher pressure. The effect of horizontal ring slosh baffle at the liquid surface is more obvious than the vertical slosh baffle when they have the same board areas. The wave range of the center of liquid mass in the tank decreases as the fill level increases.