Abstract
The extended study of Wu et al. (2012) of sloshing fluid in tanks with internal structures from 2D to 3D is presented in the paper. The phenomenon of liquid sloshing in a 3D tank with various damping devices is solved by the time-independent finite difference method combined with the ghost (fictitious) cell approach. Two types of damping devices, a tank bottom-mounted baffle and a vertically surface-piercing plate, are considered in the study. In this work, the experimental measurement of liquid sloshing in a 3D tank with the baffle is carried out to further validate the present simulation. The comparison of the results between the experimental measurement and the present computation shows good accuracy. The effect of the vertically tank bottom-mounted baffle or the vertically surface-piercing plate on various sloshing waves for the tank under horizontal oblique excitation is discussed and investigated. The phenomena of the shift of the nature frequency of the tank with damping devices due to various oblique horizontal excitations under different sloshing waves are presented in detail. The sloshing wave type is varied due to the influence of the baffle or the plate, and the coexistence of two types of sloshing waves is found for the tank under larger excitation frequencies.
Highlights
Liquid sloshing is the most prominent phenomenon of liquid motion in either stationary or moving tanks subjected to forced external perturbations
Resonant free-surface flows in tanks in aircrafts, missiles, and rockets have been the focus of extensive research
One of the passive devices to reduce the influence of sloshing impact on structures or suppress the strength of liquid sloshing is inserted in internal obstacles in containers, such as baffles, plates, rings, and wire screens
Summary
Liquid sloshing is the most prominent phenomenon of liquid motion in either stationary or moving tanks subjected to forced external perturbations. Celebi and Akyildiz [18] revealed that flow over a vertical baffle produces a shear layer and energy is dissipated by viscous effect of the fluid They concluded that, in an increased fill depth, the rolling amplitude and frequency of the tank with or without baffle configurations directly affect the degrees of nonlinearity of the sloshing phenomena. Akyildiz [23] investigated the effect of the vertical baffle height on liquid sloshing in a rolling 2D rectangular tank, and the nonlinear liquid sloshing was solved by the volume of fluid (VOF) technique. He solved the complete Navier-Stokes equations in primitive variables by using of finite difference approximations with the moving coordinate system.
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