problem with UDF drag !!!!

bohis · September 23, 2010, 09:24

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

bohis · September 24, 2010, 10:14

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

September 23, 2010, 09:24	problem with UDF drag !!!!	#1
bohis New Member Join Date: Mar 2009 Posts: 15 Rep Power: 17	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

September 24, 2010, 10:14	problem solved	#2
bohis New Member Join Date: Mar 2009 Posts: 15 Rep Power: 17	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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