boundary condition

hamid1 · May 27, 2011, 07:30

Hello

Is it possible to change boundary condition during non steady state simulation, e.g. after 10 seconds of simulating changing the poutlet to wall,
is it possible to do it regarding the case of satisfaction of some predefined criteria, e.g. if the domain reaches a specific amount of velocity... one can change from poutlet to wall ,

Thank you
Hamid

madhuvc · May 27, 2011, 13:22

you should be able to change it... depends on how are you running your transient simulation. i.e via a journal file, udf... you can change it via GUI too...

Amir · May 27, 2011, 13:25

Hi,
I've done the first case with a journal file.
For the second case, you need a complicated UDF which I saw it few month ago in this forum, but I've not tried that before.

madhuvc · May 27, 2011, 13:43

journal file..

set your boundary conditions to say Pressure outlet
run it for 10 secs
write the file
den set the boundary conditions to wall
run it..
it should work...i have changed it using GUI..that works

. hope this helps...

May 27, 2011, 07:30	boundary condition	#1
hamid1 Senior Member hamid Join Date: Nov 2010 Posts: 185 Rep Power: 16	Hello Is it possible to change boundary condition during non steady state simulation, e.g. after 10 seconds of simulating changing the poutlet to wall, is it possible to do it regarding the case of satisfaction of some predefined criteria, e.g. if the domain reaches a specific amount of velocity... one can change from poutlet to wall , Thank you Hamid

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May 27, 2011, 13:22		#2
madhuvc New Member MadhuVC Join Date: Feb 2011 Posts: 28 Rep Power: 16	you should be able to change it... depends on how are you running your transient simulation. i.e via a journal file, udf... you can change it via GUI too...

May 27, 2011, 13:25		#3
Amir Senior Member Amir Join Date: May 2009 Location: Montreal, QC Posts: 735 Blog Entries: 1 Rep Power: 24	Hi, I've done the first case with a journal file. For the second case, you need a complicated UDF which I saw it few month ago in this forum, but I've not tried that before.

May 27, 2011, 13:43		#4
madhuvc New Member MadhuVC Join Date: Feb 2011 Posts: 28 Rep Power: 16	journal file.. set your boundary conditions to say Pressure outlet run it for 10 secs write the file den set the boundary conditions to wall run it.. it should work...i have changed it using GUI..that works . hope this helps...