Dynamics of vortex evolution in a 2D baffled tank

Abstract

When the baffle height is small (db ≤ 0.2 d0), the vortex size mainly grows in the horizontal direction.Instead, the vortex size dominantly develops in the vertical direction as db ≥ 0.3 d0. The period of the generation and shedding of vortices near the baffle tip is nearly about one half of the excitation period of the tank. The dynamics of vortex evolution is closely related to the growth and the hydrodynamic interaction of the vortices and sensitively depends on the baffle height, liquid depth, excitation frequency, and excitation displacement of the tank.

Liquid Sloshing Damping in an Accelerated Tank Using a Novel Slot-Baffle Design

“…The standard solver, interDyMFoam, is used for the simulation of nonlinear free-surface waves in an accelerated tank to include inertial forces due to the linear oscillation of the tank. The non-inertial reference frame, in which the external acceleration is included into the momentum equations as a source term, is generally used to simulate liquid sloshing in an accelerated tank [6,12,31]. In this approach, the tank is kept stationary, and fluid particles are accelerated with the same excitation of the tank.…”

“…Potential flow theory has been used by many researchers to analyze the sloshing effects in both time and frequency domains [4,5]. The rapid progress in computer technology in recent years has enabled researchers to perform a realistic simulation of the fluid motion in a moving container, including secondary effects such as turbulence [6,7], surface tension [8,9], and compressibility [10,11]. Several design concepts have been recently proposed in the literature to reduce sloshing effects in moving liquid containers.…”

“…Akyildiz [14] investigated the effect of baffle height on the damping performance of the baffle, and concluded that the damping performance reduces as the baffle height increases, because the strength of the vortex separated from the tip of the baffle becomes weaker. Numerical investigations on the vortex formation in a two-dimensional baffled tank by Wu et al [6] revealed that the vortex size is strongly dependent on the baffle height. The strength of the vertical jet along the baffle and the excitation frequency are found to be key parameters on the vortex shedding near the baffle tip.…”