Numerical simulation of sloshing motion in liquid tanks with gas-liquid-solid multiphase flow
Employing multiphase flow theory,a computational model for sloshing motion with gas-liquid-solid multiphase flow within liquid tanks was established.In this model,the gas-liquid two-phase flow was treated as continuous phases and described using the Eulerian approach,with the volume of fluid(VOF)method applied to capture the motion of the gas-liquid interface,i.e.,the free surface motion;solid particles were treated as discrete phases and described by the Lagrangian approach.The CFD-DEM coupling method was applied to numerically calculate the coupled motion between two-phase fluids and solid particles.Taking the gas-water-ice multiphase flow as an example,using the STAR-CCM+software platform,the impact of ice particles in the tank on the sloshing characteristics of the liquid tank was analyzed and calculated.Firstly,by simulating the classic case of a single spherical particle falling from air into water,the effectiveness of the CFD-DEM method was verified.Secondly,numerical simulation of pure water tank sloshing was conducted and compared with the results of published experiments to verify the feasibility of the numerical method for gas-liquid two-phase flow sloshing.Then,by comparing and analyzing the pressure on the tank wall and the amplitude of free surface motion induced by sloshing in gas-water-ice multiphase flow under different volume fractions,the sloshing characteristics of gas-liquid-solid multiphase flow were studied.The calculation results indicate that with the increase of the ice particles'volume fraction,the amplitude of fluid surface fluctuation decreases,suggesting that floating particles have a significant damping effect on liquid tank sloshing.
liquid tank sloshinggas-liquid-solid multiphase flowVOF methodCFD-DEM coupled methodnumerical simulation
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