[immortality]

Hi
I want to use Cp and Cv fields in groovyBC as I told in the title.
does it need that these fields necessarily be written in time folders so that groovyBC can use them or not?
how to introduce these fields that computes by the solver(as Mach postProcessing tool uses them) to groovyBC?
I have written these lines in variables:

//"gamma=thermo.Cp()/thermo.Cv();"
                  //"Cp=thermo.Cp();"
                  //"Cv=thermo.Cv();"
                  "p_3=p0_3/pow(1+magSqr(U)/(2*Cp*T),Cp/(Cp-Cv));"

and the error:

--> FOAM FATAL ERROR: 
 Parser Error for driver PatchValueExpressionDriver at "1.25-26" :"field Cp not existing or of wrong type"
"p0_3/pow(1+magSqr(U)/(2*Cp*T),Cp/(Cp-Cv))"