How to visualize lift and drag coeff

frossi · February 5, 2017, 17:45

Hi all,

I usually use Fluent which gives you the coeff of drag and coeff of lift. But when I use CFX, it doesn't display their values. Can someone please explain me where to visualize the Cl and Cd in CFX?

Thank you.

ghorrocks · February 5, 2017, 18:51

Define an expression which evaluates Cl and Cd. Then you can display the result of the expression any way you like.

Ahmed Saeed Mansour · February 5, 2017, 19:26

How can we monitor the efficiency of a radial turbine in CFX?
Thanks

ghorrocks · February 5, 2017, 19:29

Same way - define an expression which evaluates it, and then send the results of that expression to a monitor point so you can monitor it as the simulation progresses.

You can also do this in post processing using the turbo macro in CFD-Post. This allows more complex analysis, but is done in post-processing.

February 5, 2017, 17:45	How to visualize lift and drag coeff	#1
frossi Member Ferruccio Rossi Join Date: Jun 2016 Location: Melbourne, FL USA Posts: 91 Rep Power: 10	Hi all, I usually use Fluent which gives you the coeff of drag and coeff of lift. But when I use CFX, it doesn't display their values. Can someone please explain me where to visualize the Cl and Cd in CFX? Thank you.

February 5, 2017, 18:51		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Define an expression which evaluates Cl and Cd. Then you can display the result of the expression any way you like. frossi likes this.

February 5, 2017, 19:29		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Same way - define an expression which evaluates it, and then send the results of that expression to a monitor point so you can monitor it as the simulation progresses. You can also do this in post processing using the turbo macro in CFD-Post. This allows more complex analysis, but is done in post-processing. Ahmed Saeed Mansour and frossi like this.

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February 5, 2017, 19:26		#3
Ahmed Saeed Mansour Senior Member Have a nice time! Join Date: Feb 2016 Location: mech.eng.ahmedmansour@gmail.com Posts: 291 Rep Power: 11	How can we monitor the efficiency of a radial turbine in CFX? Thanks