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Add speed of sound for tabular backends; closes #764

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Probably could optimize both speed and accuracy.
This commit is contained in:
Ian Bell
2015-08-14 22:29:47 -06:00
parent f687fe5fe6
commit 8d6edb2535
1 changed files with 4 additions and 0 deletions
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4
src/Backends/Tabular/TabularBackends.h
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@@ -827,6 +827,10 @@ class TabularBackend : public AbstractState
CoolPropDbl calc_cvmolar(void);
CoolPropDbl calc_viscosity(void);
CoolPropDbl calc_conductivity(void);
/// Calculate the speed of sound using a tabular backend [m/s]
CoolPropDbl calc_speed_sound(void){
return sqrt(1/molar_mass()*cpmolar()/cvmolar()*first_partial_deriv(iP, iDmolar, iT));
};
CoolPropDbl calc_first_partial_deriv(parameters Of, parameters Wrt, parameters Constant);
/** /brief calculate the derivative along the saturation curve, but only if quality is 0 or 1
*/