-What udf macro for boiling -

thomas

Greeting everyone, I want to simulate an impinging jet with boiling. I need to write the UDF to compute the boiling effect on the heat transfer. My fluent version is 6.2 so i am using the Euler-Euler model with energy equation. The wall BC is T = 600 K. The thing i need to compute by udf is the heat flux at the wall. For boiling there are 3 heat fluxes coming up: Convective_flux + Quenching_FLux + Vaporization_Flux.

What macro should i use to compute these flux at the wall ? Here are some ideas:

1 - I thought about defining the quenching and vaporization flux using a Define_heat_flux (with the cid[0] variable). - Using that way ?, Does the convective flux will be computed by default in Fluent or do i need to integrate it in the Define_heat_flux macro ? - What will be the Total flux report in the report_flux_panel ?

2 - I have read in some fluent ugm presentation that these 3 fluxes should be set in a define_source and be be put in the energy equation. - How can I just use a define_source just at the wall ? - How can I hook this define source in the energy equation.

I hope someone is gonna bring me some clarification. Thanks by advance. Thomas