Abstract
The phenomenon of sloshing consists in the violent liquid motion inside partially filled containers and it is a major concern for the design of a number of structures in naval and offshore industry. The use of perforated swash bulkheads is an effective technique to mitigate the sloshing. In the present work, a comprehensive investigation of the sloshing within box-shaped tanks equipped with perforated bulkheads is carried out. The investigation considered a broad range of parameters, which includes several open-area ratios and different filling levels under pitching excitations encompassing the first three sloshing resonant modes of a non-compartmented tank. As a result, a relation of optimized open-area ratio as function of the filling ratio is achieved for overall sloshing mitigation. The effectiveness of the obtained relation is confirmed by numerical simulations using proposed swash bulkhead geometries that follow the optimized open-area distribution. As the perforated bulkheads introduces additional complexity to the already challenging sloshing phenomenon, the numerical simulations of the present work were performed by adopting a fully-Lagrangian particle-based method, which easily deals with phenomena involving nonlinear free surface conditions, such as large free surfaces deformation and fragmentation, and complex geometries.
Published Version
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