Liquid Droplet Impingement
 

Hi,
I am having some trouble in getting converged solution when the two liquid droplet streams (as a Lagrangian phase) impinge on each other. As soon as the two droplets collide, the residuals go high withing 1-2 iterations.

Is there any other way to model liquid droplet impingement with good residual convergence? OR what other parameters should be adjusted?

Thanking you.