Phase velocity in VOF model UDF

baechtel · June 15, 2009, 21:25

Hi everybody,

Iam working on drop impact on a solid surface. What I want is to track the contact line velocity from the 2nd phase only during the spreading on the surface.
But I don't understand which variables I need to use to write my UDF.

I know that I have an access to the velocity magnitude for the mixture model but I only need the 2nd phase. Maybe I can substract the first phase velocity from the mixture phase ?

If someone can help me I would really appreciate.
Thanks for help,

Guillaume

niriosrat · April 18, 2016, 19:39

Did you got an answer for that?

hypotalamoos · August 4, 2019, 11:17

hello every body.
did u get the answer??
i am simulating a bubble column by vof and need the bubble velosity and diameter..but not know what to do!

June 15, 2009, 21:25	Phase velocity in VOF model UDF	#1
baechtel New Member baechtelguillaume Join Date: Apr 2009 Posts: 13 Rep Power: 17	Hi everybody, Iam working on drop impact on a solid surface. What I want is to track the contact line velocity from the 2nd phase only during the spreading on the surface. But I don't understand which variables I need to use to write my UDF. I know that I have an access to the velocity magnitude for the mixture model but I only need the 2nd phase. Maybe I can substract the first phase velocity from the mixture phase ? If someone can help me I would really appreciate. Thanks for help, Guillaume

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April 18, 2016, 19:39		#2
niriosrat New Member Nicolas Join Date: Jun 2009 Posts: 19 Rep Power: 16	Did you got an answer for that?

August 4, 2019, 11:17		#3
hypotalamoos New Member n kh Join Date: Jan 2013 Posts: 7 Rep Power: 13	hello every body. did u get the answer?? i am simulating a bubble column by vof and need the bubble velosity and diameter..but not know what to do!