CFD Post Expression creation

jasonbot · July 14, 2015, 13:46

Im trying to create an expression in Post to extract the boundary layer length ( $\delta$ ) from my simulation at any point on the surface. I have a simulation of a turbine blade in a rotating reference frame.

So far what I've done has been to define a surface at some distance away from the blade surface to define as my freestream velocity. Following this I need to create an expression to extract the velocity at 99% of this value in the corresponding coordinate system and then to plot a surface of the heights above the surface corresponding to the 99% velocity.

I've attached a plot showing some of my geometry.

Any suggestions as to how to go about doing this? Im new to Post and CEL and I can only seem to do scalar expressions.

ghorrocks · July 14, 2015, 20:04

This sounds challenging to do in CFD-Post. I would export your data and do it in matlab, python, tecplot or something like that.

jasonbot · July 15, 2015, 07:21

Thanks for the suggestion! I was wondering if it was possible in Post but you've confirmed its not.

July 14, 2015, 20:04		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	This sounds challenging to do in CFD-Post. I would export your data and do it in matlab, python, tecplot or something like that. jasonbot and salehorafi like this.

July 15, 2015, 07:21		#3
jasonbot Member Jason Join Date: May 2013 Location: South Africa Posts: 32 Rep Power: 13	Thanks for the suggestion! I was wondering if it was possible in Post but you've confirmed its not. salehorafi likes this.

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