problem with UDF drag !!!!
 

Hello everybody!

I am facing to the problem with user defiend drag.
I have a water flat jet (DPM) and continuous phase (air). I have to consider two- way coupling between water droplets and air. When I use spherical drag law, everything works well. But as soon as I switch to user defined DPM, problems appear - there is no momentum exchange between phases!!!
This is not definitely problem of UDF, it must be somewhere else.

Does anybody know the answer??? Please?
Honza

problem solved
 

Hi there, I solved the problem and must hit the wall with my head. The UDF was not working since I put constants like 15 instead of 15.0 :)