cel for pressure

Rada · May 24, 2011, 00:47

Hi all
I want to do a transient analysis in ansys-cfx and I want to have following B.C s at inlet and outlet:

At inlet of the tube: a pressure of 1333.2pa is applied during 0.003s and 0 afterwards.

At the outlet: a pressure of 0 Pa is imposed.

Now my question in that: how can I write a CEL for the dependence of pressure on the time at the inlet of tube??
I will be glad if anyone can give me some helps in this topic.
thanks alot
kind regards
Rada

ghorrocks · May 24, 2011, 07:41

Set the pressure equal to 1333.2[Pa] * step((0.003[s]-t)/1[s])

You can also do this using if functions or a 1D interpolation function.

May 24, 2011, 00:47	cel for pressure	#1
Rada New Member nayyer Join Date: Apr 2011 Posts: 4 Rep Power: 15	Hi all I want to do a transient analysis in ansys-cfx and I want to have following B.C s at inlet and outlet: At inlet of the tube: a pressure of 1333.2pa is applied during 0.003s and 0 afterwards. At the outlet: a pressure of 0 Pa is imposed. Now my question in that: how can I write a CEL for the dependence of pressure on the time at the inlet of tube?? I will be glad if anyone can give me some helps in this topic. thanks alot kind regards Rada

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May 24, 2011, 07:41		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Set the pressure equal to 1333.2[Pa] * step((0.003[s]-t)/1[s]) You can also do this using if functions or a 1D interpolation function.