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http://dx.doi.org/10.26748/KSOE.2018.6.32.4.228

Sloshing Damping in a Swaying Rectangular Tank Using a Porous Bulkhead  

Cho, Il-Hyoung (Department of Ocean System Engineering, Jeju National University)
Publication Information
Journal of Ocean Engineering and Technology / v.32, no.4, 2018 , pp. 228-236 More about this Journal
Abstract
The performance of a porous swash bulkhead for the reduction of the resonant liquid motion in a swaying rectangular tank was investigated based on the assumption of linear potential theory. The Galerkin method (Porter and Evans, 1995) was used to solve the potential flow model by adding a viscous frictional damping term to the free-surface condition. By comparing the experimental results and the analytical solutions, we verified that the frictional damping coefficient was 0.4. Darcy's law was used to consider the energy dissipation at a porous bulkhead. The tool that was developed with a built-in frictional damping coefficient of 0.4 was confirmed by small-scale experiments. Using this tool, the free-surface elevation, hydrodynamic force (added mass, damping coefficient) on a wall, and the horizontal load on a bulkhead were assessed for various combinations of porosity and submergence depth. It was found that the vertical porous bulkhead can suppress sloshing motions significantly when properly designed and by selecting the appropriate porosity(${\approx}0.1$) and submergence depth.
Keywords
Porous bulkhead; Energy dissipation; Porosity coefficient; Model test; Sloshing; Resonant frequency;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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