WaterPropsIAPWSphi Class Reference

#include <WaterPropsIAPWSphi.h>

Public Member Functions
	WaterPropsIAPWSphi ()
	Base constructor.
doublereal	phi (doublereal tau, doublereal delta)
	Calculate the Phi function, which is the base function.
doublereal	phi_d (doublereal tau, doublereal delta)
	Delta derivative of phi.
doublereal	phi_dd (doublereal tau, doublereal delta)
	2nd derivative of phi wrt delta
doublereal	phi_t (doublereal tau, doublereal delta)
	First derivative of phi wrt tau.
doublereal	phi_tt (doublereal tau, doublereal delta)
	Second derivative of phi wrt tau.
void	check1 ()
	Internal check # 1.
void	check2 ()
	Internal check # 2.
doublereal	pressureM_rhoRT (doublereal tau, doublereal delta)
	Calculate the dimensionless pressure at tau and delta;.
doublereal	dimdpdrho (doublereal tau, doublereal delta)
	Dimensionless derivative of p wrt rho at constant T.
doublereal	dimdpdT (doublereal tau, doublereal delta)
	Dimensionless derivative of p wrt T at constant rho.
doublereal	dfind (doublereal p_red, doublereal tau, doublereal deltaGuess)
	This program computes the reduced density, given the reduced pressure and the reduced temperature, tau.
doublereal	gibbs_RT () const
	Calculate the dimensionless gibbs free energy.
doublereal	enthalpy_RT () const
	Calculate the dimensionless enthalpy, h/RT.
doublereal	entropy_R () const
	Calculate the dimensionless entropy, s/R.
doublereal	intEnergy_RT () const
	Calculate the dimensionless internal energy, u/RT.
doublereal	cv_R () const
	Calculate the dimensionless constant volume heat capacity, Cv/R.
doublereal	cp_R () const
	Calculate the dimensionless constant pressure heat capacity, Cv/R.
void	tdpolycalc (doublereal tau, doublereal delta)
	Calculates internal polynomials in tau and delta.
doublereal	phiR () const
	Return the value of phiR(), res.
Private Member Functions
doublereal	phi0 () const
	nau calculation
doublereal	phiR_d () const
	calculation of d_phiR/d_d
doublereal	phi0_d () const
	calculation of d_nau/d_d
doublereal	phiR_dd () const
	calculation of d2_res/d_dd
doublereal	phi0_dd () const
	calculation of d2_nau/d_dd
doublereal	phi0_t () const
	calculation of d_nau/d_t
doublereal	phiR_t () const
	calculation of d_res/d_t
doublereal	phiR_tt () const
	calculation of d2_res/d_tt
doublereal	phi0_tt () const
	calculation of d2_nau/d_tt
doublereal	phiR_dt () const
	calculation of d2_res/d_dt
doublereal	phi0_dt () const
	calculation of d2_nau/d_dt
void	intCheck (doublereal tau, doublereal delta)
	intCheck() calculates all of the functions at a one point and prints out the result.
Private Attributes
doublereal	TAUp [52]
	Value of internally calculated polynomials of powers of TAU.
doublereal	DELTAp [16]
	Value of internally calculated polynomials of powers of delta.
doublereal	TAUsave
	Last tau that was used to calculate polynomials.
doublereal	TAUsqrt
	sqrt of TAU
doublereal	DELTAsave
	Last delta that was used to calculate polynomials.

Detailed Description

the WaterPropsIAPSWSphi class support low level calls for the real description of water.

The reference is W. Wagner, A. Prub, "The IAPWS Formulation 1995 for the Themodynamic Properties of Ordinary Water Substance for General and Scientific Use," J. Phys. Chem. Ref. Dat, 31, 387, 2002.

Units Note: This class works with reduced units exclusively.

Definition at line 32 of file WaterPropsIAPWSphi.h.

Constructor & Destructor Documentation

WaterPropsIAPWSphi ( )

Base constructor.

Constructor for the object.

Definition at line 367 of file WaterPropsIAPWSphi.cpp.

References DELTAp, and TAUp.

Member Function Documentation

void check1 ( )

Internal check # 1.

Definition at line 408 of file WaterPropsIAPWSphi.cpp.

References intCheck(), Cantera::Rho_c, and Cantera::T_c.

void check2 ( )

Internal check # 2.

Definition at line 417 of file WaterPropsIAPWSphi.cpp.

References intCheck(), Cantera::Rho_c, and Cantera::T_c.

doublereal cp_R ( ) const

Calculate the dimensionless constant pressure heat capacity, Cv/R.

Definition at line 1261 of file WaterPropsIAPWSphi.cpp.

References cv_R(), DELTAsave, phiR_d(), phiR_dd(), phiR_dt(), and TAUsave.

Referenced by WaterPropsIAPWS::cp().

doublereal cv_R ( ) const

Calculate the dimensionless constant volume heat capacity, Cv/R.

Definition at line 1250 of file WaterPropsIAPWSphi.cpp.

References phi0_tt(), phiR_tt(), and TAUsave.

Referenced by cp_R(), and WaterPropsIAPWS::cv().

doublereal dfind	(	doublereal	p_red,
		doublereal	tau,
		doublereal	deltaGuess
	)

This program computes the reduced density, given the reduced pressure and the reduced temperature, tau.

It takes an initial guess, deltaGuess. DeltaGuess is important as this is a multivalued function below the critical point.

Parameters:

	p_red	Value of the dimensionless pressure
	tau	Dimensionless temperature = T_c/T
	deltaGuess	Initial guess for the dimensionless density

Returns:: Returns the dimensionless density.

It takes an initial guess, deltaGuess. DeltaGuess is important as this is a multivalued function below the critical point.

Definition at line 1116 of file WaterPropsIAPWSphi.cpp.

References phiR_d(), phiR_dd(), and tdpolycalc().

Referenced by WaterPropsIAPWS::density(), and WaterPropsIAPWS::density_const().

doublereal dimdpdrho	(	doublereal	tau,
		doublereal	delta
	)

Dimensionless derivative of p wrt rho at constant T.

dp/drho * 1/RT = (2. delta phi_d() + delta**2 phi_dd()) (1.0 + 2. delta phiR_d() + delta**2 phiR_dd())

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 786 of file WaterPropsIAPWSphi.cpp.

References phiR_d(), phiR_dd(), and tdpolycalc().

Referenced by WaterPropsIAPWS::dpdrho().

doublereal dimdpdT	(	doublereal	tau,
		doublereal	delta
	)

Dimensionless derivative of p wrt T at constant rho.

dp/dT * M/(Rho R) = (1.0 + delta phiR_d()

tau delta (phiR_dt())

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 794 of file WaterPropsIAPWSphi.cpp.

References phiR_d(), phiR_dt(), and tdpolycalc().

Referenced by WaterPropsIAPWS::coeffPresExp().

doublereal enthalpy_RT ( ) const

Calculate the dimensionless enthalpy, h/RT.

Calculate the dimensionless enthalpy h/RT.

Definition at line 1213 of file WaterPropsIAPWSphi.cpp.

References DELTAsave, phi0_t(), phiR_d(), phiR_t(), and TAUsave.

Referenced by WaterPropsIAPWS::enthalpy().

doublereal entropy_R ( ) const

Calculate the dimensionless entropy, s/R.

Definition at line 1226 of file WaterPropsIAPWSphi.cpp.

References phi0(), phi0_t(), phiR(), phiR_t(), and TAUsave.

Referenced by WaterPropsIAPWS::entropy().

doublereal gibbs_RT ( ) const

Calculate the dimensionless gibbs free energy.

Calculate the dimensionless gibbs free energy g/RT.

Definition at line 1203 of file WaterPropsIAPWSphi.cpp.

References DELTAsave, phi0(), phiR(), and phiR_d().

Referenced by WaterPropsIAPWS::corr(), and WaterPropsIAPWS::Gibbs().

void intCheck	(	doublereal	tau,
		doublereal	delta
	)			`[private]`

intCheck() calculates all of the functions at a one point and prints out the result.

It's used for conducting the internal check.

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 385 of file WaterPropsIAPWSphi.cpp.

References phi0(), phi0_d(), phi0_dd(), phi0_dt(), phi0_t(), phi0_tt(), phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), phiR_tt(), and tdpolycalc().

Referenced by check1(), and check2().

doublereal intEnergy_RT ( ) const

Calculate the dimensionless internal energy, u/RT.

Definition at line 1239 of file WaterPropsIAPWSphi.cpp.

References phi0_t(), phiR_t(), and TAUsave.

Referenced by WaterPropsIAPWS::intEnergy().

doublereal phi	(	doublereal	tau,
		doublereal	delta
	)

Calculate the Phi function, which is the base function.

The phi functino is basically the helmholtz free energy Eqn. (6.4) All internal polynomials are recalculated.

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 531 of file WaterPropsIAPWSphi.cpp.

References phi0(), phiR(), and tdpolycalc().

Referenced by WaterPropsIAPWS::helmholtzFE(), phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), and phiR_tt().

doublereal phi0 ( ) const [private]

nau calculation

Definition at line 452 of file WaterPropsIAPWSphi.cpp.

References DELTAsave, and TAUsave.

Referenced by entropy_R(), gibbs_RT(), intCheck(), and phi().

doublereal phi0_d ( ) const [private]

calculation of d_nau/d_d

Definition at line 623 of file WaterPropsIAPWSphi.cpp.

References DELTAsave.

Referenced by intCheck(), and phi_d().

doublereal phi0_dd ( ) const [private]

calculation of d2_nau/d_dd

Definition at line 768 of file WaterPropsIAPWSphi.cpp.

References DELTAsave.

Referenced by intCheck(), and phi_dd().

doublereal phi0_dt ( ) const [private]

calculation of d2_nau/d_dt

Calculate d2_phi0/dtauddelta.

Definition at line 1013 of file WaterPropsIAPWSphi.cpp.

Referenced by intCheck().

doublereal phi0_t ( ) const [private]

calculation of d_nau/d_t

Definition at line 805 of file WaterPropsIAPWSphi.cpp.

References TAUsave.

Referenced by enthalpy_RT(), entropy_R(), intCheck(), intEnergy_RT(), and phi_t().

doublereal phi0_tt ( ) const [private]

calculation of d2_nau/d_tt

Definition at line 903 of file WaterPropsIAPWSphi.cpp.

References TAUsave.

Referenced by cv_R(), intCheck(), and phi_tt().

doublereal phi_d	(	doublereal	tau,
		doublereal	delta
	)

Delta derivative of phi.

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 633 of file WaterPropsIAPWSphi.cpp.

References phi0_d(), phiR_d(), and tdpolycalc().

doublereal phi_dd	(	doublereal	tau,
		doublereal	delta
	)

2nd derivative of phi wrt delta

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 778 of file WaterPropsIAPWSphi.cpp.

References phi0_dd(), phiR_dd(), and tdpolycalc().

doublereal phi_t	(	doublereal	tau,
		doublereal	delta
	)

First derivative of phi wrt tau.

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 892 of file WaterPropsIAPWSphi.cpp.

References phi0_t(), phiR_t(), and tdpolycalc().

doublereal phi_tt	(	doublereal	tau,
		doublereal	delta
	)

Second derivative of phi wrt tau.

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 1002 of file WaterPropsIAPWSphi.cpp.

References phi0_tt(), phiR_tt(), and tdpolycalc().

doublereal phiR ( ) const

Return the value of phiR(), res.

Definition at line 472 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, phi(), TAUp, TAUsave, and TAUsqrt.

Referenced by WaterPropsIAPWS::corr1(), entropy_R(), gibbs_RT(), intCheck(), and phi().

doublereal phiR_d ( ) const [private]

calculation of d_phiR/d_d

Definition at line 547 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, phi(), TAUp, TAUsave, and TAUsqrt.

Referenced by cp_R(), dfind(), dimdpdrho(), dimdpdT(), enthalpy_RT(), gibbs_RT(), intCheck(), phi_d(), and pressureM_rhoRT().

doublereal phiR_dd ( ) const [private]

calculation of d2_res/d_dd

Definition at line 662 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, phi(), TAUp, TAUsave, and TAUsqrt.

Referenced by cp_R(), dfind(), dimdpdrho(), intCheck(), and phi_dd().

doublereal phiR_dt ( ) const [private]

calculation of d2_res/d_dt

Definition at line 1024 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, phi(), TAUp, TAUsave, and TAUsqrt.

Referenced by cp_R(), dimdpdT(), and intCheck().

doublereal phiR_t ( ) const [private]

calculation of d_res/d_t

Definition at line 823 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, phi(), TAUp, TAUsave, and TAUsqrt.

Referenced by enthalpy_RT(), entropy_R(), intCheck(), intEnergy_RT(), and phi_t().

doublereal phiR_tt ( ) const [private]

calculation of d2_res/d_tt

Definition at line 922 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, phi(), TAUp, TAUsave, and TAUsqrt.

Referenced by cv_R(), intCheck(), and phi_tt().

doublereal pressureM_rhoRT	(	doublereal	tau,
		doublereal	delta
	)

Calculate the dimensionless pressure at tau and delta;.

pM/(rhoRT) = delta * phi_d() = 1.0 + delta phiR_d()

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

note: this is done so much, we have a seperate routine.

Definition at line 648 of file WaterPropsIAPWSphi.cpp.

References phiR_d(), and tdpolycalc().

Referenced by WaterPropsIAPWS::pressure().

void tdpolycalc	(	doublereal	tau,
		doublereal	delta
	)

Calculates internal polynomials in tau and delta.

This routine is used to store the internal state of tau and delta for later use by the other routines in the class.

Parameters:

	tau	Dimensionless temperature = T_c/T
	delta	Dimensionless density = delta = rho / Rho_c

Definition at line 430 of file WaterPropsIAPWSphi.cpp.

References DELTAp, DELTAsave, TAUp, TAUsave, and TAUsqrt.

Referenced by WaterPropsIAPWS::density_const(), WaterPropsIAPWS::densSpinodalSteam(), WaterPropsIAPWS::densSpinodalWater(), dfind(), dimdpdrho(), dimdpdT(), intCheck(), WaterPropsIAPWS::operator=(), WaterPropsIAPWS::phaseState(), phi(), phi_d(), phi_dd(), phi_t(), phi_tt(), pressureM_rhoRT(), WaterPropsIAPWS::setState_TR(), and WaterPropsIAPWS::WaterPropsIAPWS().

Member Data Documentation

doublereal DELTAp[16] [private]

Value of internally calculated polynomials of powers of delta.

Definition at line 216 of file WaterPropsIAPWSphi.h.

Referenced by phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), phiR_tt(), tdpolycalc(), and WaterPropsIAPWSphi().

doublereal DELTAsave [private]

Last delta that was used to calculate polynomials.

Definition at line 225 of file WaterPropsIAPWSphi.h.

Referenced by cp_R(), enthalpy_RT(), gibbs_RT(), phi0(), phi0_d(), phi0_dd(), phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), phiR_tt(), and tdpolycalc().

doublereal TAUp[52] [private]

Value of internally calculated polynomials of powers of TAU.

Definition at line 213 of file WaterPropsIAPWSphi.h.

Referenced by phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), phiR_tt(), tdpolycalc(), and WaterPropsIAPWSphi().

doublereal TAUsave [private]

Last tau that was used to calculate polynomials.

Definition at line 219 of file WaterPropsIAPWSphi.h.

Referenced by cp_R(), cv_R(), enthalpy_RT(), entropy_R(), intEnergy_RT(), phi0(), phi0_t(), phi0_tt(), phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), phiR_tt(), and tdpolycalc().

doublereal TAUsqrt [private]

sqrt of TAU

Definition at line 222 of file WaterPropsIAPWSphi.h.

Referenced by phiR(), phiR_d(), phiR_dd(), phiR_dt(), phiR_t(), phiR_tt(), and tdpolycalc().

The documentation for this class was generated from the following files:

WaterPropsIAPWSphi Class Reference

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation