Analysis of Sloshing Characteristics of Two-Layered Liquid in Tanks
Based on computational fluid dynamics(CFD)technology,STAR-CCM+,a fluid computing software,is used to study the sloshing characteristics of the double-layer liquid in the cabin.The numerical simulation of the small amplitude wave free sloshing of two-layered liquid is carried out,and the natural frequencies of the free surface and oil-water interface are calculated,and the results are compared with those of the linear potential flow theory.The numerical simulation results are compared with the experimental results,and the sloshing characteristics of single and two-layered liquids under different excitation conditions were compared and analyzed.The results show that each sloshing mode of layered liquid has two natural frequencies,and the natural frequencies of the upper liquid are higher,and the natural frequencies of the single liquid only have one natural frequency,which decreases with the increase of viscosity.Compared with single-layer liquid,the free surface sloshing of layered liquid is smaller,and there is a certain phase lag,which reduces the pressure impact amplitude.The oil-water interface of the layered liquid move more slowly than the free surface,and the upper liquid has a restraining effect on the lower liquid.
layered liquid sloshingnumerical simulationvolume of fluid(VOF)methodfree decay
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