CFD post case compare

ch@resch · May 22, 2017, 06:38

Hi all,

I have two different cases say, "flow 1" and "flow 2". I would like to plot the percentage error of wall shear stresses in CFD post.
((WSS1-WSS2)/WSS1)*100
After going through the manual, I have used case comparison, but it only calculates the difference between the two cases. Then i tried making a variable,
percent error = (Wall Shear.Difference/Wall Shear)*100.
I feel the value that i get after I use it is not right. Because I am not sure the "Wall Shear" here refers to which case flow 1 or flow 2.

Then again I tried using another form say,
percent error = (Wall Shear.Difference/Wall Shear.Case:1)*100
I get a syntax error

Successfully read 37 characters:
Wall Shear.Difference/Wall Shear.CASE
then error detected at:
:1
Details - Unexpected character.

I am not clear on how to get the percent error from two cases. Any kind of help regarding this would be appreciated.

Thanks and Regards

CFD_new_user · December 7, 2022, 09:02

Hello,
Did you find a solution to this?

May 22, 2017, 06:38	CFD post case compare	#1
ch@resch New Member Mohammed Ameenuddin Join Date: May 2017 Posts: 9 Rep Power: 8	Hi all, I have two different cases say, "flow 1" and "flow 2". I would like to plot the percentage error of wall shear stresses in CFD post. ((WSS1-WSS2)/WSS1)100 After going through the manual, I have used case comparison, but it only calculates the difference between the two cases. Then i tried making a variable, percent error = (Wall Shear.Difference/Wall Shear)100. I feel the value that i get after I use it is not right. Because I am not sure the "Wall Shear" here refers to which case flow 1 or flow 2. Then again I tried using another form say, percent error = (Wall Shear.Difference/Wall Shear.Case:1)*100 I get a syntax error Successfully read 37 characters: Wall Shear.Difference/Wall Shear.CASE then error detected at: :1 Details - Unexpected character. I am not clear on how to get the percent error from two cases. Any kind of help regarding this would be appreciated. Thanks and Regards

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December 7, 2022, 09:02		#2
CFD_new_user New Member Join Date: Dec 2022 Posts: 4 Rep Power: 3	Hello, Did you find a solution to this?