Effect of dual vertical porous baffles on sloshing reduction in a swaying rectangular tank. (1st November 2016)

• Record Type: Journal Article
• Authors: Cho, I.H.; Kim, M.H.
• Is Part Of: Ocean engineering. Volume 126(2016)
• Page Start: 364
• Page End: 373
• Publication Date: 2016-11-01
• Subjects: Dual vertical porous baffles -- Sloshing -- Matched eigenfunction expansion method -- Experiment -- MPS (moving particle semi-implicit) -- Resonant frequency; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2016.09.004
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Liquid sloshing inside tanks of a vessel may result in increased/decreased vessel motions or structural damages. The resonant sloshing motions can be suppressed by using baffles inside a tank. Especially, more energy dissipation is possible by using porous baffles. Here, the effect of dual vertical porous baffles on the sloshing reduction inside a rectangular tank is investigated both theoretically and experimentally. The matched eigenfunction expansion method is applied to obtain the analytic solutions in the context of linear potential theory with porous boundary conditions. The porosity effect is included through inertial and quadratic-drag terms. The theoretical prediction is then compared with a series of experiments conducted by authors with harmonically oscillated rectangular tank at various frequencies and baffle parameters. The measured data reasonably correlate with the predicted values. It is found that the dual vertical porous baffles can significantly suppress sloshing motions when properly designed by selecting optimal porosity, submergence depth, and installation position. Highlights: The analytic solutions for the liquid sloshing with dual porous baffles in a sway-oscillated rectangular tank were considered. A series of experiments were conducted in the 2D rectangular tank with dual vertical porous baffles to validate the analytical solutions. The effects of the porosity and the position/submergence depth of baffles on sloshing motions were systematically investigated. The prediction tool will be used to find the optimal design of baffles through an extensive parametric study.