Cp as a function

April 4, 2008, 08:08

Hi there,

I try to set the ideal gas Cp as a function of Cp. Therefore I wrote a fortran user routine which calculates a cp for a specific temperature. How can I manage this? Each time I try to set my function NOT as interpolation data the solver crashes. If I interpolate data with a function everything is fine. Is there something wrong with the code? I have a (for testing) fixed value of 2000.0 which I return.

Any ideas? Plz help me

April 4, 2008, 08:32

"Cp as a function of Cp"...

Is that a typo? Surely Cp cannot depend on Cp! You would get in a real mess!

Do you really need to use Fortran? If you can do the job using CEL expressions I think your life would be made much easier.

andy

April 4, 2008, 09:06

Hi,

sorry, I meant Cp as a function of (T,Pressure).

I really need fortran.

April 5, 2008, 12:49

CFX has already this function (CP) inside!

April 8, 2008, 05:55

So this is a real gas then?

April 4, 2008, 08:08	Cp as a function	#1
Mareike Guest Posts: n/a	Hi there, I try to set the ideal gas Cp as a function of Cp. Therefore I wrote a fortran user routine which calculates a cp for a specific temperature. How can I manage this? Each time I try to set my function NOT as interpolation data the solver crashes. If I interpolate data with a function everything is fine. Is there something wrong with the code? I have a (for testing) fixed value of 2000.0 which I return. Any ideas? Plz help me

April 4, 2008, 08:32	Re: Cp as a function	#2
andy2O Guest Posts: n/a	"Cp as a function of Cp"... Is that a typo? Surely Cp cannot depend on Cp! You would get in a real mess! Do you really need to use Fortran? If you can do the job using CEL expressions I think your life would be made much easier. andy

April 4, 2008, 09:06	Re: Cp as a function	#3
Mareike Guest Posts: n/a	Hi, sorry, I meant Cp as a function of (T,Pressure). I really need fortran.

April 5, 2008, 12:49	Re: Cp as a function	#4
Rogerio Fernandes Brito Guest Posts: n/a	CFX has already this function (CP) inside!

April 8, 2008, 05:55	Re: Cp as a function	#5
HekLeR Guest Posts: n/a	So this is a real gas then?

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