Numerical Simulation of Air-core Vortex Using an Axisymmetric Boundary Condition

Abstract

Accurate numerical simulation of liquid draining is important to study the physics fluid flow. However, liquid draining involves multiphase and rotational flows, where
numerical simulation is expensive to accurately recreate these flow behaviors. Therefore, this paper presents a numerical method of liquid draining inside a tank using OpenFOAM by proposing an axi-symmetric boundary condition to reduce the computational cost and time. The axi-symmetric boundary condition shows an excellent and strong capability to simulate the liquid draining and simultaneously reduce the time and computational cost by 14 times as compared to the full cylinder mesh.