Error in comparison of two cases with a domain at different locations CFD Post

aadicfd · May 13, 2021, 20:16

I have two transient simulation cases for the same model of a radial turbine where one of the domains (the blade) in both the cases is at a different angle because of differences in timesteps. When I do the case comparison, the ANSYS does not show the difference between the two cases, instead, the view with the difference is just a blank screen. Does anyone know the reason for this and how to solve this issue?
Thank you!

Gert-Jan · May 14, 2021, 08:01

I think that if the timesteps don't match, then Post can't compare them. Because the position of your turbine and mesh do not match.

In your case, I think you can only compare the final position (if they are similar) and compare time averaged results. And standard deviation, if you have caculated them.

May 13, 2021, 20:16	Error in comparison of two cases with a domain at different locations CFD Post	#1
aadicfd New Member Aaditya Join Date: Apr 2021 Posts: 19 Rep Power: 5	I have two transient simulation cases for the same model of a radial turbine where one of the domains (the blade) in both the cases is at a different angle because of differences in timesteps. When I do the case comparison, the ANSYS does not show the difference between the two cases, instead, the view with the difference is just a blank screen. Does anyone know the reason for this and how to solve this issue? Thank you!

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May 14, 2021, 08:01		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,928 Rep Power: 28	I think that if the timesteps don't match, then Post can't compare them. Because the position of your turbine and mesh do not match. In your case, I think you can only compare the final position (if they are similar) and compare time averaged results. And standard deviation, if you have caculated them.