Liquid sloshing in a rectangular tank with vertical slotted porous screen: Based on analytical, numerical, and experimental approach

Abstract

The performance of a porous screen placed in the center of a rectangular tank has been investigated based on an analytical, numerical, and experimental approach for the lateral excitation of the tank. The two-dimensional potential model was solved analytically with the Galerkin method by adding the frictional damping coefficient at the free surface condition and considering the energy dissipation across the porous screen. The comparison of the analytical solution with the experimental results shows a good agreement for the frictional damping coefficient of 0.3. The main physical parameters are the surface elevation, pressure at the tank walls, including hydrodynamic forces on the wall, and the horizontal load on the porous screen for different submergence depths and porosities that were investigated. The presence of screen shifts the sloshing tank natural periods slightly, especially in the lowest mode. The unrevealed phenomena accompanied with linear potential theory, the nonlinear wave profile and screen associated effects were also investigated based on an experimental and numerical method. The results show that the numerical prediction with STAR-CCM+ was in good agreement with the experimental results up to second-harmonics. It was found that the porous slotted screen can be an effective device for the suppression of sloshing motion if properly designed.