Effectiveness of porous baffle on resonance sloshing motion: An experimental study

Abstract

Liquid movement in tanks that is partially filled can cause large structural loads if the tank movement is near the natural period of fluid within the tank. Sloshing implies the movement of a free liquid surface inside a vessel. A shake-Table experiment for various depths of water of aspect ratio 0.163, 0.325, and 0.488 are investigated to examine the effect of sloshing. The frequencies of excitation range from 0.4566 Hz to 1.9757 Hz which covers up to the fifth mode sloshing frequency and a constant amplitude of 7.5mm is adopted. A single porous at l/2 location is considered to check its effectiveness in comparison with the unbaffled condition. Three different porosities of 15%, 20%, and 25 % are adopted. Capacitance wave probes are used to record the free surface elevation at the end walls. The results of maximum free surface elevation (ηmax) and spectral moments (mo) are present here. The suppression of resonant sloshing motion by porous baffle is analyzed. A higher sloshing oscillation is observed for the aspect ratio (hs/l) of 0.325 than compared with the other two fill levels. © 2023 Author(s).