Residuals in RMS or MAX

Fouch · July 9, 2021, 05:07

Hi,

Could you tell me if residuals values are in RMS or Max values in OpenFoam ?

Thanks !

dlahaye · July 9, 2021, 06:39

RMS using gSumMag

The implementation of (gSumProd and) gSumMag can be found here: https://github.com/OpenFOAM/OpenFOAM...eldFunctions.H

Fouch · July 9, 2021, 07:14

Thank you for your feedback.
So this Max by default ?

dlahaye · July 9, 2021, 07:26

RMS (*not* MAX) by default.

RMS here as the Euclidean norm of a vector.

norm(v) = \sqrt( \sum_i (v_i)^2 )

Fouch · July 9, 2021, 09:55

Ok, that's clear for me now.

Thank you so much for your help.

July 9, 2021, 05:07	Residuals in RMS or MAX	#1
Fouch Member Join Date: Feb 2020 Posts: 79 Rep Power: 7	Hi, Could you tell me if residuals values are in RMS or Max values in OpenFoam ? Thanks !

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July 9, 2021, 06:39		#2
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 885 Blog Entries: 1 Rep Power: 20	RMS using gSumMag The implementation of (gSumProd and) gSumMag can be found here: https://github.com/OpenFOAM/OpenFOAM...eldFunctions.H

July 9, 2021, 07:14		#3
Fouch Member Join Date: Feb 2020 Posts: 79 Rep Power: 7	Thank you for your feedback. So this Max by default ?

July 9, 2021, 07:26		#4
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 885 Blog Entries: 1 Rep Power: 20	RMS (not MAX) by default. RMS here as the Euclidean norm of a vector. norm(v) = \sqrt( \sum_i (v_i)^2 )

July 9, 2021, 09:55		#5
Fouch Member Join Date: Feb 2020 Posts: 79 Rep Power: 7	Ok, that's clear for me now. Thank you so much for your help.