CFD-Post: Averaging results across different cases to generate a new case

Shanny · August 16, 2019, 04:09

Hello,

I have four different results files based on the same geometry and mesh, but with slightly different inlet conditions.

What I would like to do is average velocity across all four cases at every point to generate a fifth case that represents the average of all four, which I can then post-process in the usual way to generate contour and vector plots, etc.

Is this possible to do in CFD-Post? Apologies if this is an elementary question, I've tried to find the answer but haven't had any luck.

Thank you in advance!

Carlo_P · August 19, 2019, 05:40

Hey Shanny,
what you can do is restart a new simulation that interpolate the results from the previous one.
When you start CFX solver, you can start from previous runs.
It will interpolate between the given solutions.

Maybe this can be a solution.

Otherwise, you can export the data of each simulation in Ensight format ASCII and interpolate later "manually" with Excel the data.
Obviusoly, this works well with a limited number of cells

August 16, 2019, 04:09	CFD-Post: Averaging results across different cases to generate a new case	#1
Shanny New Member Shannon Kieran Join Date: Jul 2019 Posts: 3 Rep Power: 6	Hello, I have four different results files based on the same geometry and mesh, but with slightly different inlet conditions. What I would like to do is average velocity across all four cases at every point to generate a fifth case that represents the average of all four, which I can then post-process in the usual way to generate contour and vector plots, etc. Is this possible to do in CFD-Post? Apologies if this is an elementary question, I've tried to find the answer but haven't had any luck. Thank you in advance!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to Connect 2 cases in CFD Post	AK5	CFX	5	May 30, 2017 05:11
Plotting transient results in cfd post or fluent	suyesh	Visualization & Post-Processing	1	May 13, 2016 09:54
CFD Post - How to check for case in an expression	pilakin	ANSYS	0	September 26, 2014 04:44
FEA results within CFD Post	delaneyluke	ANSYS	0	October 24, 2013 09:30

August 19, 2019, 05:40		#2
Carlo_P Senior Member Carlo_P Join Date: May 2019 Location: Italy Posts: 176 Rep Power: 7	Hey Shanny, what you can do is restart a new simulation that interpolate the results from the previous one. When you start CFX solver, you can start from previous runs. It will interpolate between the given solutions. Maybe this can be a solution. Otherwise, you can export the data of each simulation in Ensight format ASCII and interpolate later "manually" with Excel the data. Obviusoly, this works well with a limited number of cells