time derivative in transient run

Zhuhan · February 8, 2021, 10:34

Dear researchers.I want to get the time derivative of pressure during the Transient running. But the expression "pressure.Time Derivative" doesn't do it.
Can you give me some advice?

Opaque · February 8, 2021, 11:30

What do you mean by "does not do it"?

How did you do it?

What is the error you encounter?

Say, you create an additional variable MyAv1 equal to "sin( w * time)", and you create another additional variable MyAv2 equal to MyAv1.Time Derivative.

You add monitor points for both variables at a given location, and visualize it in the SolverManager.

ghorrocks · February 8, 2021, 16:34

Zhuhan please do not post identical posts on multiple threads. I have deleted your duplicate question on the other thread.

February 8, 2021, 10:34	time derivative in transient run	#1
Zhuhan New Member Join Date: Feb 2021 Posts: 3 Rep Power: 5	Dear researchers.I want to get the time derivative of pressure during the Transient running. But the expression "pressure.Time Derivative" doesn't do it. Can you give me some advice?

February 8, 2021, 11:30		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,806 Rep Power: 32	What do you mean by "does not do it"? How did you do it? What is the error you encounter? Say, you create an additional variable MyAv1 equal to "sin( w * time)", and you create another additional variable MyAv2 equal to MyAv1.Time Derivative. You add monitor points for both variables at a given location, and visualize it in the SolverManager. aero_head likes this. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

February 8, 2021, 16:34		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,708 Rep Power: 143	Zhuhan please do not post identical posts on multiple threads. I have deleted your duplicate question on the other thread. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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