RMS as output parameter

redneck pony · March 18, 2022, 06:38

Hello.
ANSYS CFX. Does anyone know how to output RMS residual values from the solver to the output parameters? Like, for example, efficiency or pressure drop of a stage.
I found how to return the value of the maximum residual, but I can`t find the root mean square (RMS residual). Maybe who knows?

https://drive.google.com/file/d/1Dqu...ew?usp=sharing

ghorrocks · March 18, 2022, 17:55

Define a CEL expression something like rmsAve(u.residual)@domain, and use that expression as a monitor point and make the monitor point an output parameter.

You might need to select the option to add the residuals to the results file to get access to this.

March 18, 2022, 06:38	RMS as output parameter	#1
redneck pony New Member Anton Join Date: Mar 2022 Location: Kyiv Posts: 1 Rep Power: 0	Hello. ANSYS CFX. Does anyone know how to output RMS residual values from the solver to the output parameters? Like, for example, efficiency or pressure drop of a stage. I found how to return the value of the maximum residual, but I can`t find the root mean square (RMS residual). Maybe who knows? https://drive.google.com/file/d/1Dqu...ew?usp=sharing Last edited by redneck pony; March 18, 2022 at 08:53.

March 18, 2022, 17:55		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,010 Rep Power: 146	Define a CEL expression something like rmsAve(u.residual)@domain, and use that expression as a monitor point and make the monitor point an output parameter. You might need to select the option to add the residuals to the results file to get access to this. Opaque and redneck pony like this. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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