Error when creating a contour on a user surface

NickiP · November 7, 2018, 03:10

Hi all,

I'm hoping you may be able to help me - I'm trying to plot a thermal comfort metric in a space (CFD Post, run in CFX) and keep getting the same error message popping up:

WARNING
'Vertex' values for Variable 'UTCI3var' do not exist on Geometry /USER SURFACE:Occupied Surface.

This UTCI3var is a section of the full equation based on air temperature, air speed, mean radiant temperature and humidity (included as an attachment for reference) which can all be plotted without issue on their own.

Has anyone come across this before or have any advice on how to fix please?

Thanks,

Nicki

ghorrocks · November 7, 2018, 17:46

I don't know exactly what the problem is but on a surface the fluid velocity is zero by definition so check whether your function is valid with zero velocity. In particular, how is the "vair" variable defined and is it defined on a wall surface?

evcelica · November 8, 2018, 11:13

I'm guessing you stripped all the units from the expression? Or else your expression would not work due to units not matching in all the terms.

November 7, 2018, 17:46		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,716 Rep Power: 143	I don't know exactly what the problem is but on a surface the fluid velocity is zero by definition so check whether your function is valid with zero velocity. In particular, how is the "vair" variable defined and is it defined on a wall surface? __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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November 8, 2018, 11:13		#3
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	I'm guessing you stripped all the units from the expression? Or else your expression would not work due to units not matching in all the terms.