Numerical simulation of liquid sloshing in a tank with partially filled liquid by nonlinear external excitation

Numerical simulation on the liquid sloshing in a cylindrical tank with partially filled liquid by periodic boundary excitation was performed to determine the influences of external excitation frequency and swing radius upon the force exerted on the container wall, and upon the liquid sloshing amplitude and frequency. The numerical results show that after a period of adjustment, the sloshing amplitude will be stable and the sloshing frequency approaches the external excitation frequency. When the external excitation frequency approaches the liquid natural frequency, the liquid sloshing amplitude will increase and the impact force exerted on container wall will be stronger. In addition, the liquid sloshing frequency is irrelevant to the swing radius while the liquid sloshing amplitude decreases with an increase in swing radius.