DNS of the interaction between counter rotating vortices

Understanding the nature of interaction between a pair of vortex filaments is essential to predict cavitation inception in the filaments. DNS is used to study the effect of core radius on the dynamics of the interaction between a pair of unequal strength counter-rotating vortices. The simulations examine conditions that lead to lowest pressure in either of the vortices. The extent of stretching and deformation of the filament cores is analysed and the variation in collapse time, minimum pressure and maximum vorticity with radii ratio are discussed.