thermal phase change

serdar

dear all: I have a problem. my problem is as follow: i have a pressure tank and at the bottom of the tank (in the tank temperature 180 celcius and pressure 1mpa saturated water) there is a pipe which is opened to atmospehere. in case of any accident the pipe is activated and water is discharged. but in the pipe water becomes two-phase flow. i have only pressure and temperature as inlet condition. i want to calculate pressure, temperature mass fraction of vapor and water, velocity and other thermodynamic and thermalhydrolic properties. before i did not use cfx but i have some friends they use cfx. if anyone know how to simulate the two phase(thermal phase change) or cavitation please help me. many thanks serdar