Udf condensation ed evaporation
 

Hi, i have some problems with Udf. For my rotating heat pipe i have to write a udf for the change phase (water). I should use Sun's model. Any ideas about how i can write like an Udf this?

Attachment 83493


Attachment 83494


Where - Cl are the grid cell where the interface exists ( unsatured phase);

- Cls are the grid cell occupied by the saturated phase next to CI;

- VCI and VCIs represent the volume of the CI cell and CIs cell,
respectively, while hfg denotes the latent heat of evaporation;
- QCI,in (the heat transferred
into CI) and QCIs,in (the heat transferred into CIs) for evaporation
process.

Thank you for any thanks for any help.