Can I use UDF function to solve this problem?

bright181 · December 10, 2010, 03:24

I want to simulate the process of the methane flow into a dynamic mesh. I hope the methane flows into the cylinder of dynamic mesh when the mesh has moved for a few seconds(the deformation of cylinder can form turbulence), that means I have to control the timing and duration of methane flow. Can I use UDF to define a inlet boundry to do this thing?
Thank you in advance

Bernhard · December 10, 2010, 04:51

Yes, I suppose a DEFINE_PROFILE will do.

bright181 · December 10, 2010, 05:23

You means I have to define a periodic pressure profile in udf?

Bernhard · December 10, 2010, 05:46

I don't know your precise set-up (concentration, two-fluid or?), but in general you can control your boundary condition in time and space using a DEFINE_PROFILE UDF. You can check the UDF Manual for some examples.

December 10, 2010, 03:24	Can I use UDF function to solve this problem?	#1
bright181 New Member zhuliang Join Date: Nov 2010 Location: China Posts: 13 Rep Power: 16	I want to simulate the process of the methane flow into a dynamic mesh. I hope the methane flows into the cylinder of dynamic mesh when the mesh has moved for a few seconds(the deformation of cylinder can form turbulence), that means I have to control the timing and duration of methane flow. Can I use UDF to define a inlet boundry to do this thing? Thank you in advance

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December 10, 2010, 04:51		#2
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	Yes, I suppose a DEFINE_PROFILE will do.

December 10, 2010, 05:23		#3
bright181 New Member zhuliang Join Date: Nov 2010 Location: China Posts: 13 Rep Power: 16	You means I have to define a periodic pressure profile in udf?

December 10, 2010, 05:46		#4
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	I don't know your precise set-up (concentration, two-fluid or?), but in general you can control your boundary condition in time and space using a DEFINE_PROFILE UDF. You can check the UDF Manual for some examples.