EFFECT OF VORTEX/VORTEX INTERACTION ON BUBBLE DYNAMICS AND CAVITATION NOISE

The effect of vortex/vortex interaction on bubble dynamics and cavitation noise is investigated using a Eulerian-Lagrangian approach. For the liquid phase direct numerical simulation of the Navier-Stokes equations is used to simulate two-unequal co-rotating vortices. A bubble dynamics model is employed to track the nuclei for the disperse phase flow and is coupled with the Navier-stokes computation at each time step. Two cases of different relative vortex strengths are selected to study the interaction between the vortices. The unsteady flow structure due to the interaction is described in detail. The effect of unsteady flow filed on the bubble dynamics is shown to be important and could lead to a probability issue on the cavitation event