# how to calculat the pressure coefficient in ansys

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 October 30, 2006, 13:53 how to calculat the pressure coefficient in ansys #1 Nav1982 Guest   Posts: n/a Hi, can anyone tell me how to plot and calculate the pressure coefficient around a body in CFX-post so that in every defined location the Cp plot will be created?Thanks

 October 30, 2006, 15:03 Re: how to calculat the pressure coefficient in an #2 Robin Guest   Posts: n/a Write a CEL expression for Cp, then create a new variable with your expression. Your variable can be plotted as any other variable. -Robin

 October 31, 2006, 10:07 Re: how to calculat the pressure coefficient in an #3 Nav1982 Guest   Posts: n/a thanks Robine, I try

 March 2, 2010, 10:28 #4 Senior Member   Join Date: Mar 2009 Posts: 138 Rep Power: 9 Hello, I also want to plot Cp along a Line. Thus I have written the following equation: (Pressure-(Pressure@Inlet))/(0.5*Density@Inlet*Velocity@Inlet^2) But i get this odd error Message: "...The following unrecognised names were referenced: Density, Pressure, Velocity." Altough I got these Names from the "right-click-insert-menu" Anybody knows where the problem is? Thanks!

 March 2, 2010, 17:58 #5 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 12,638 Rep Power: 98 Have a look in the CFX documentation, in the reference guide, for CEL expressions. This will give you the variable names. You have simply not used the correct variable names.

 July 27, 2010, 03:05 #6 New Member   Nick Join Date: Apr 2009 Posts: 6 Rep Power: 9 Hi camoesas Could you please tell me if you were able to get the above CEL expression to work. I am facing the same problem. Your help will be very much appreciated.

 July 27, 2010, 07:22 #7 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 12,638 Rep Power: 98 The errors camoesas made are trivial - look in the documentation and you will work it out. For instance he should replace "Density@Inlet" with massFlowAve(Density)@Inlet, and other simple changes.

 July 27, 2010, 07:35 #8 New Member   Nick Join Date: Apr 2009 Posts: 6 Rep Power: 9 Thanks ghorrocks.

April 12, 2011, 02:40
help on the CEL plz
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hanna
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Quote:
 Originally Posted by Robin ;78900 Write a CEL expression for Cp, then create a new variable with your expression. Your variable can be plotted as any other variable. -Robin
would u plz give me help on creating Cp expression in CEL?

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