Hi Amine...

Thanks a lot for your reply. We have already completed the simulation with mixture model using Zwart-Gerber-Belamri model for mass transfer. Zwart-Gerber-Belamri model for mass transfer hooked as UDF (same UDF crashing with Eulerian model). 

Abuaf, N., et al. Study of nonequilibrium flashing of water in a converging-diverging nozzle. Volume 1: experimental. No. NUREG/CR-1864-Vol. 1; BNL-NUREG-51317-Vol. 1. Brookhaven National Lab., Upton, NY (USA), 1981.

Other reserchers (, and others) have used Thermal phase change with Eulerian approach for better matching. 

We want to improve the accuracy.