Problems regarding mass transfer UDF

Yifan_G · November 2, 2014, 04:09

Hi, I'm an undergraduate student using Fluent for my final year project. I have encountered some problems while using a mass transfer UDF in my simulation.
I found that every time I save and reload my case file, the mass transfer UDF becomes unhooked and I have to hook it again.

This become very troublesome when I try to send my case file to our high performance computer for calculation since the case file will definitely be reloaded and there won't be any mass transfer.
The information printed in the console shows that the UDF is successfully loaded. Also, I've tried different mass transfer UDFs and I'm pretty sure that it's not the UDF's problem.
Does anyone know how to solve this problem?
Thank you.

adi.ptb · November 2, 2014, 05:12

You should first compile your udf in high performance computer after that read your case file

Yifan_G · November 2, 2014, 05:17

Quote:

Originally Posted by adi.ptb

You should first compile your udf in high performance computer after that read your case file

Yea I have already complied my UDFs in the HPC for parallel computing.

adi.ptb · November 2, 2014, 05:39

Did you use different versions of fluent in your pc and hpc?

Yifan_G · November 2, 2014, 13:14

Quote:

Originally Posted by adi.ptb

Did you use different versions of fluent in your pc and hpc?

I don't have access to ANSYS on my pc. Basically everything is done in the hpc. I have tried Fluent 14.0 and 15.0, both have the same problem.
Thanks.

gerardosrez · December 8, 2014, 10:38

I have the same trouble, I compile/load the UDF for mass transfer in Phases/Interactions.....

I write the case and data files then when I reopen magically the UDF has disappeared...

After I try to re-compile/load the UDF gives me an error...

Have you solved this my friend???

CeesH · December 8, 2014, 10:53

Do you use a journal file on the HPC?
If so, put the compilation and hooking of the UDF inside the journal file. Otherwise the hooked UDF will still refer to the location it used to be when you set up the case and data - likely on your local machine - so even if the UDF is compiled at the cluster the path will not match and FLUENT won't find it.

gerardosrez · December 8, 2014, 11:11

Dear Mr Ceesh,

I don't use HPC I use my own desktop...

CeesH · December 8, 2014, 11:21

what error do you get when recompiling?

November 2, 2014, 04:09	Problems regarding mass transfer UDF	#1
Yifan_G New Member Gao Yifan Join Date: Nov 2014 Posts: 3 Rep Power: 12	Hi, I'm an undergraduate student using Fluent for my final year project. I have encountered some problems while using a mass transfer UDF in my simulation. I found that every time I save and reload my case file, the mass transfer UDF becomes unhooked and I have to hook it again. This become very troublesome when I try to send my case file to our high performance computer for calculation since the case file will definitely be reloaded and there won't be any mass transfer. The information printed in the console shows that the UDF is successfully loaded. Also, I've tried different mass transfer UDFs and I'm pretty sure that it's not the UDF's problem. Does anyone know how to solve this problem? Thank you.

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November 2, 2014, 05:12		#2
adi.ptb Member ad Join Date: Apr 2014 Posts: 75 Rep Power: 12	You should first compile your udf in high performance computer after that read your case file

November 2, 2014, 05:39		#4
adi.ptb Member ad Join Date: Apr 2014 Posts: 75 Rep Power: 12	Did you use different versions of fluent in your pc and hpc?

December 8, 2014, 10:38		#6
gerardosrez Member G. S. Join Date: Nov 2010 Posts: 54 Rep Power: 15	I have the same trouble, I compile/load the UDF for mass transfer in Phases/Interactions..... I write the case and data files then when I reopen magically the UDF has disappeared... After I try to re-compile/load the UDF gives me an error... Have you solved this my friend???

December 8, 2014, 10:53		#7
CeesH Senior Member Cees Haringa Join Date: May 2013 Location: Delft Posts: 607 Rep Power: 0	Do you use a journal file on the HPC? If so, put the compilation and hooking of the UDF inside the journal file. Otherwise the hooked UDF will still refer to the location it used to be when you set up the case and data - likely on your local machine - so even if the UDF is compiled at the cluster the path will not match and FLUENT won't find it.

December 8, 2014, 11:11		#8
gerardosrez Member G. S. Join Date: Nov 2010 Posts: 54 Rep Power: 15	Dear Mr Ceesh, I don't use HPC I use my own desktop...

December 8, 2014, 11:21		#9
CeesH Senior Member Cees Haringa Join Date: May 2013 Location: Delft Posts: 607 Rep Power: 0	what error do you get when recompiling?