Abstract
A slot-baffle design used in water treatment tanks previously developed by the authors is used to suppress sloshing effects in an accelerated tank. This new application is another example of the versatility of the slot-baffle design in inducing turbulence in fluid flow systems, which has numerous uses in engineering applications. Large amplitude surface waves in a harmonically excited tank are simulated using a second-order accurate numerical model in OpenFOAM. The verification of the numerical model is performed by comparing the numerical results with existing laboratory measurements, which show a favorable agreement. Various slot configurations are studied in order to evaluate the damping performance during the external excitation of the tank. It is shown that the present design shows an effective dissipation performance in a broad range of oscillation frequencies, while 88% of the internal kinetic energy of the liquid is dissipated over thirty oscillation periods for the resonance case.
Highlights
Liquid sloshing in open containers with the external excitation is an important phenomenon in engineering applications, such as liquid carriers in ground, marine, or air transport vehicles, as well as in earthquake excited water supply towers
The tank is subjected to the sinusoidal horizontal oscillation, where is the amplitude of the displacement, which was selected as 0.93 cm, and is the angular frequency of the excitation, which was selected to be the same as the natural frequency of the tank, in order to observe large amplitude sloshing waves in the container
Non-linear liquid sloshing in an accelerated tank is investigated based on the three-dimensional numerical simulations using OpenFOAM
Summary
Liquid sloshing in open containers with the external excitation is an important phenomenon in engineering applications, such as liquid carriers in ground, marine, or air transport vehicles, as well as in earthquake excited water supply towers. Several design concepts have been recently proposed in the literature to reduce sloshing effects in moving liquid containers. Cho et al [15] investigated the dissipation performance of the horizontal porous baffle using linear potential theory and experimental measurements for various submergence depths and baffle porosities. They concluded that the horizontal porous baffles implemented at the tank walls significantly reduce the violent sloshing effects during harmonic excitation. Three-dimensional numerical simulations have been conducted using OpenFOAM code for the rectangular tank, subjected to various excitation frequencies in order to show the damping performance of the proposed design in a broad range of oscillation frequencies
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