4.8. Thermodynamic Properties (Nondimensional)

Table 4.7: Thermodynamic Properties (Nondimensional) Subroutines[a]

Subroutine

Description

SUBROUTINE CKATHM (NDIM1, NDIM2, ICKWRK, RCKWRK, MAXTP, NT, TMP, A)

Returns the coefficients of the fits for thermodynamic properties of species; see Equation 2–29 through Equation 2–31 .

SUBROUTINE CKCPOR (T, ICKWRK, RCKWRK, CPOR)

Returns the nondimensional specific heats at constant pressure; see Equation 2–29 .

SUBROUTINE CKHORT (T, ICKWRK, RCKWRK, HORT)

Returns the nondimensional enthalpies; see Equation 2–30 .

SUBROUTINE CKMXTP (ICKWRK, MAXTP)

Returns the maximum number of temperatures used in fitting the thermodynamic properties of the species.

SUBROUTINE CKRHEX (K, RCKWRK, A6)

Returns an array of the sixth thermodynamic polynomial coefficients for a species, or changes their value, depending on the sign of K.

SUBROUTINE CKSMH (T, ICKWRK, RCKWRK, SMH)*

Returns the array of entropies minus enthalpies for species. It is normally not called directly by the user.

SUBROUTINE CKSOR (T, ICKWRK, RCKWRK, SOR)

Returns the nondimensional entropies; see Equation 2–31 .

[a] Where appropriate, the description refers to an equation number in Chemkin Theory Manual .