[mechanicaltobe]

Proclaimer:
Please keep in mind that i have worked on Fluent for a couple of years now but I am fairly a beginner in Multiphase simulation. I've worked on flow simulation of turbine blades, foils... on Fluent before but never multiphase.

Problem:
I am currently simulating the flow of a cryogenic fluid through a nozzle onto a plate. Due to the difference in pressure and temperature with the environment, part of the fluid will evaporate. The cryogenic fluid is used to cool the plate which has a relatively high temperature and will also cause the fluid to evaporate.

Questions:
1) Is this simulation feasible or does it need to be cut up into different simulations? (nozzle alone, flow onto plate alone)
2) Also, which model would be best to simulate this flow + evaporation? I've read online that the mixture model is probably the best but I don't really understand why.
3) Can any of you recommend good explanations/links on UDFs and how to write them?

Thanks for the help!