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problem with UDF drag !!!!

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Old   September 23, 2010, 08:24
Default problem with UDF drag !!!!
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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?
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Old   September 24, 2010, 09:14
Default problem solved
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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
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