Numerical study of the interfacial sloshing wave interaction with a porous bottom layer in a partially filled rectangular tank

摘要

A numerical model was developed to study the effect of a porous bottom layer on sloshing dynamics in a rectangular tank containing single and multilayered fluids. The bottom porosity effect for various water filling levels in a tank are studied over a range of excitation frequencies for single and multilayered sloshing over a porous bottom layer by varying the porosity ratio and permeability value of the bottom layer. The fluid region of the tank was governed by the incompressible Navier-Stokes equation while the Brinkman's equation governed the porous layer region. The effect of the excitation frequency, the porosity and permeability values of the bottom layer on the sloshing dynamics were analyzed with prominent results being reported. smaller porosity ratios and permeability values of the porous bottom layer were found to offer an increased wave damping capability, with dynamic pressure impact mitigating achieved from the porous material being attached on tank walls.