HydrogenFluidPropertiesTest.C File Reference

Go to the source code of this file.

Functions
	TEST_F (HydrogenFluidPropertiesTest, fluidName)
	Test that the fluid name is correctly returned.
	TEST_F (HydrogenFluidPropertiesTest, molarMass)
	Test that the molar mass is correctly returned.
	TEST_F (HydrogenFluidPropertiesTest, criticalProperties)
	Test that the critical properties are correctly returned.
	TEST_F (HydrogenFluidPropertiesTest, triplePointProperties)
	Test that the triple point properties are correctly returned.
	TEST_F (HydrogenFluidPropertiesTest, vapor)
	Verify calculation of vapor pressure, vapor density and saturated liquid density.
	TEST_F (HydrogenFluidPropertiesTest, henry)
	Verify that the coefficients for Henry's constant are correct using Guidelines on the Henry's constant and vapour liquid distribution constant for gases in H20 and D20 at high temperatures, IAPWS (2004).
	TEST_F (HydrogenFluidPropertiesTest, thermalConductivity)
	Verify calculation of thermal conductivity using data from Assael, Assael, Huber, Perkins and Takata, Correlation of te thermal conductivity of normal and parahydrogen from the triple point to 1000 K and up to 100 Mpa, Journal of Physical and Chemical Reference Data, 40 (2011)
	TEST_F (HydrogenFluidPropertiesTest, viscosity)
	Verify calculation of viscosity using data from Muzny, Huber and Kazakov, Correlation for the viscosity of normal hydrogen obtained from symbolic regression, Journal of Chemical and Engineering Data, 58, 969-979 (2013)
	TEST_F (HydrogenFluidPropertiesTest, properties)
	Verify calculation of thermophysical properties of Hydrogen using reference data from NIST.
	TEST_F (HydrogenFluidPropertiesTest, derivativesNearCritical)
	Verify calculation of the derivatives of all properties by comparing with finite differences.
	TEST_F (HydrogenFluidPropertiesTest, derivatives)
	TEST_F (HydrogenFluidPropertiesTest, combined)
	Verify that the methods that return multiple properties in one call return identical values as the individual methods.

Function Documentation

TEST_F() [1/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		combined
	)

Verify that the methods that return multiple properties in one call return identical values as the individual methods.

Definition at line 240 of file HydrogenFluidPropertiesTest.C.

{
  const Real p = 1.0e6;
  const Real T = 300.0;
  const Real tol = REL_TOL_CONSISTENCY;
 
  // Single property methods
  Real rho, drho_dp, drho_dT;
  _fp->rho_from_p_T(p, T, rho, drho_dp, drho_dT);
  Real mu, dmu_dp, dmu_dT;
  _fp->mu_from_p_T(p, T, mu, dmu_dp, dmu_dT);
  Real e, de_dp, de_dT;
  _fp->e_from_p_T(p, T, e, de_dp, de_dT);
 
  // Combined property methods
  Real rho2, drho2_dp, drho2_dT, mu2, dmu2_dp, dmu2_dT, e2, de2_dp, de2_dT;
  _fp->rho_mu_from_p_T(p, T, rho2, mu2);
 
  ABS_TEST(rho, rho2, tol);
  ABS_TEST(mu, mu2, tol);
 
  _fp->rho_mu_from_p_T(p, T, rho2, drho2_dp, drho2_dT, mu2, dmu2_dp, dmu2_dT);
  ABS_TEST(rho, rho2, tol);
  ABS_TEST(drho_dp, drho2_dp, tol);
  ABS_TEST(drho_dT, drho2_dT, tol);
  ABS_TEST(mu, mu2, tol);
  ABS_TEST(dmu_dp, dmu2_dp, tol);
  ABS_TEST(dmu_dT, dmu2_dT, tol);
 
  _fp->rho_e_from_p_T(p, T, rho2, drho2_dp, drho2_dT, e2, de2_dp, de2_dT);
  ABS_TEST(rho, rho2, tol);
  ABS_TEST(drho_dp, drho2_dp, tol);
  ABS_TEST(drho_dT, drho2_dT, tol);
  ABS_TEST(e, e2, tol);
  ABS_TEST(de_dp, de2_dp, tol);
  ABS_TEST(de_dT, de2_dT, tol);
}

TEST_F() [2/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		criticalProperties
	)

Test that the critical properties are correctly returned.

Definition at line 29 of file HydrogenFluidPropertiesTest.C.

{
  ABS_TEST(_fp->criticalPressure(), 1.2964e6, REL_TOL_SAVED_VALUE);
  ABS_TEST(_fp->criticalTemperature(), 33.145, REL_TOL_SAVED_VALUE);
  ABS_TEST(_fp->criticalDensity(), 31.26226704, REL_TOL_SAVED_VALUE);
}

TEST_F() [3/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		derivatives
	)

Definition at line 173 of file HydrogenFluidPropertiesTest.C.

{
  const Real tol = REL_TOL_DERIVATIVE;
 
  const Real p = 1.0e6;
  Real T = 350.0;
 
  DERIV_TEST(_fp->rho_from_p_T, p, T, tol);
  DERIV_TEST(_fp->mu_from_p_T, p, T, tol);
  DERIV_TEST(_fp->e_from_p_T, p, T, tol);
  DERIV_TEST(_fp->h_from_p_T, p, T, tol);
  DERIV_TEST(_fp->s_from_p_T, p, T, tol);
  DERIV_TEST(_fp->k_from_p_T, p, T, tol);
 
  // Viscosity from density and temperature
  T = 360.0;
  const Real drho = 1.0e-4;
  Real rho, drho_dp, drho_dT;
  _fp->rho_from_p_T(p, T, rho, drho_dp, drho_dT);
 
  Real dmu_drho_fd =
      (_fp->mu_from_rho_T(rho + drho, T) - _fp->mu_from_rho_T(rho - drho, T)) / (2.0 * drho);
  Real mu = 0.0, dmu_drho = 0.0, dmu_dT = 0.0;
  _fp->mu_from_rho_T(rho, T, drho_dT, mu, dmu_drho, dmu_dT);
 
  ABS_TEST(mu, _fp->mu_from_rho_T(rho, T), REL_TOL_CONSISTENCY);
  REL_TEST(dmu_drho, dmu_drho_fd, tol);
 
  // To properly test derivative wrt temperature, use p and T and calculate density,
  // so that the change in density wrt temperature is included
  const Real dp = 1.0e1;
  const Real dT = 1.0e-4;
  _fp->rho_from_p_T(p, T, rho, drho_dp, drho_dT);
  _fp->mu_from_rho_T(rho, T, drho_dT, mu, dmu_drho, dmu_dT);
 
  Real dmu_dT_fd = (_fp->mu_from_rho_T(_fp->rho_from_p_T(p, T + dT), T + dT) -
                    _fp->mu_from_rho_T(_fp->rho_from_p_T(p, T - dT), T - dT)) /
                   (2.0 * dT);
 
  REL_TEST(dmu_dT, dmu_dT_fd, tol);
 
  Real dmu_dp_fd = (_fp->mu_from_p_T(p + dp, T) - _fp->mu_from_p_T(p - dp, T)) / (2.0 * dp);
  Real dmu_dp = 0.0;
  _fp->mu_from_p_T(p, T, mu, dmu_dp, dmu_dT);
 
  ABS_TEST(mu, _fp->mu_from_p_T(p, T), REL_TOL_CONSISTENCY);
  REL_TEST(dmu_dp, dmu_dp_fd, tol);
 
  _fp->mu_from_p_T(p, T, mu, dmu_dp, dmu_dT);
  dmu_dT_fd = (_fp->mu_from_p_T(p, T + dT) - _fp->mu_from_p_T(p, T - dT)) / (2.0 * dT);
 
  REL_TEST(dmu_dT, dmu_dT_fd, tol);
 
  // The temperature derivative must be finite at the collision integral reducing
  // temperature (30.41 K), where log(T*) = 0
  const Real T_star = 30.41;
  rho = 70.0;
  _fp->mu_from_rho_T(rho, T_star, 0.0, mu, dmu_drho, dmu_dT);
  dmu_dT_fd =
      (_fp->mu_from_rho_T(rho, T_star + dT) - _fp->mu_from_rho_T(rho, T_star - dT)) / (2.0 * dT);
  REL_TEST(dmu_dT, dmu_dT_fd, tol);
}

TEST_F() [4/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		derivativesNearCritical
	)

Verify calculation of the derivatives of all properties by comparing with finite differences.

Definition at line 155 of file HydrogenFluidPropertiesTest.C.

{
  const Real tol = REL_TOL_DERIVATIVE;
 
  // Slightly supercritical state (Tc = 33.145 K, pc = 1.2964 MPa)
  const Real p = 1.4e6;
  const Real T = 36.0;
 
  DERIV_TEST(_fp->rho_from_p_T, p, T, tol);
  DERIV_TEST(_fp->e_from_p_T, p, T, tol);
  DERIV_TEST(_fp->h_from_p_T, p, T, tol);
 
  // The isobaric heat capacity is the temperature derivative of the enthalpy
  Real h, dh_dp, dh_dT;
  _fp->h_from_p_T(p, T, h, dh_dp, dh_dT);
  REL_TEST(_fp->cp_from_p_T(p, T), dh_dT, REL_TOL_CONSISTENCY);
}

TEST_F() [5/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		fluidName
	)

Test that the fluid name is correctly returned.

Definition at line 16 of file HydrogenFluidPropertiesTest.C.

{ EXPECT_EQ(_fp->fluidName(), "hydrogen"); }

TEST_F() [6/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		henry
	)

Verify that the coefficients for Henry's constant are correct using Guidelines on the Henry's constant and vapour liquid distribution constant for gases in H20 and D20 at high temperatures, IAPWS (2004).

Definition at line 63 of file HydrogenFluidPropertiesTest.C.

{
  const Real tol = REL_TOL_EXTERNAL_VALUE;
  const std::vector<Real> hc = _fp->henryCoefficients();
 
  REL_TEST(hc[0], -4.73284, tol);
  REL_TEST(hc[1], 6.08954, tol);
  REL_TEST(hc[2], 6.06066, tol);
}

TEST_F() [7/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		molarMass
	)

Test that the molar mass is correctly returned.

Definition at line 21 of file HydrogenFluidPropertiesTest.C.

{
  ABS_TEST(_fp->molarMass(), 2.01588e-3, REL_TOL_SAVED_VALUE);
}

TEST_F() [8/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		properties
	)

Verify calculation of thermophysical properties of Hydrogen using reference data from NIST.

Definition at line 114 of file HydrogenFluidPropertiesTest.C.

{
  // Pressure = 1 MPa, temperature = 280 K
  Real p = 1.0e6;
  Real T = 280.0;
 
  const Real tol = REL_TOL_EXTERNAL_VALUE;
 
  REL_TEST(_fp->rho_from_p_T(p, T), 0.86069, tol);
  REL_TEST(_fp->h_from_p_T(p, T), 3676.1e3, tol);
  REL_TEST(_fp->e_from_p_T(p, T), 2514.2e3, tol);
  REL_TEST(_fp->s_from_p_T(p, T), 43.025e3, tol);
  REL_TEST(_fp->cp_from_p_T(p, T), 14.26e3, tol);
  REL_TEST(_fp->cv_from_p_T(p, T), 10.112e3, tol);
  REL_TEST(_fp->c_from_p_T(p, T), 1283.9, tol);
 
  // Pressure = 1 MPa, temperature = 500 K
  T = 500.0;
  REL_TEST(_fp->rho_from_p_T(p, T), 0.48302, tol);
  REL_TEST(_fp->h_from_p_T(p, T), 6856.5e3, tol);
  REL_TEST(_fp->e_from_p_T(p, T), 4786.2e3, tol);
  REL_TEST(_fp->s_from_p_T(p, T), 51.401e3, tol);
  REL_TEST(_fp->cp_from_p_T(p, T), 14.52e3, tol);
  REL_TEST(_fp->cv_from_p_T(p, T), 10.392e3, tol);
  REL_TEST(_fp->c_from_p_T(p, T), 1704.1, tol);
 
  // Pressure = 10 MPa, temperature = 500 K
  p = 10.0e6;
  REL_TEST(_fp->rho_from_p_T(p, T), 4.6658, tol);
  REL_TEST(_fp->h_from_p_T(p, T), 6923.4e3, tol);
  REL_TEST(_fp->e_from_p_T(p, T), 4780.1e3, tol);
  REL_TEST(_fp->s_from_p_T(p, T), 41.892e3, tol);
  REL_TEST(_fp->cp_from_p_T(p, T), 14.584e3, tol);
  REL_TEST(_fp->cv_from_p_T(p, T), 10.436e3, tol);
  REL_TEST(_fp->c_from_p_T(p, T), 1764.3, tol);
}

TEST_F() [9/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		thermalConductivity
	)

Verify calculation of thermal conductivity using data from Assael, Assael, Huber, Perkins and Takata, Correlation of te thermal conductivity of normal and parahydrogen from the triple point to 1000 K and up to 100 Mpa, Journal of Physical and Chemical Reference Data, 40 (2011)

Definition at line 79 of file HydrogenFluidPropertiesTest.C.

{
  const Real tol = REL_TOL_EXTERNAL_VALUE;
 
  REL_TEST(_fp->k_from_rho_T(0.80844, 298.15), 186.97e-3, tol);
  REL_TEST(_fp->k_from_rho_T(30.0, 35.0), 71.854e-3, tol);
  REL_TEST(_fp->k_from_rho_T(15.879, 400.0), 248.6e-3, tol);
 
  REL_TEST(_fp->k_from_p_T(30.0e6, 400.0), 248.6e-3, tol);
}

TEST_F() [10/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		triplePointProperties
	)

Test that the triple point properties are correctly returned.

Definition at line 39 of file HydrogenFluidPropertiesTest.C.

{
  ABS_TEST(_fp->triplePointPressure(), 7.7e3, REL_TOL_SAVED_VALUE);
  ABS_TEST(_fp->triplePointTemperature(), 13.952, REL_TOL_SAVED_VALUE);
}

TEST_F() [11/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		vapor
	)

Verify calculation of vapor pressure, vapor density and saturated liquid density.

Definition at line 49 of file HydrogenFluidPropertiesTest.C.

{
  const Real tol = REL_TOL_EXTERNAL_VALUE;
 
  // Vapor pressure
  REL_TEST(_fp->vaporPressure(14.0), 7.541e3, tol);
  REL_TEST(_fp->vaporPressure(30.0), 0.80432e6, tol);
}

TEST_F() [12/12]

TEST_F	(	HydrogenFluidPropertiesTest	,
		viscosity
	)

Verify calculation of viscosity using data from Muzny, Huber and Kazakov, Correlation for the viscosity of normal hydrogen obtained from symbolic regression, Journal of Chemical and Engineering Data, 58, 969-979 (2013)

Definition at line 96 of file HydrogenFluidPropertiesTest.C.

{
  const Real tol = 10.0 * REL_TOL_EXTERNAL_VALUE;
 
  // The dilute-gas limit does not depend on the density correlation, so it can be
  // compared at the standard tolerance
  REL_TEST(_fp->mu_from_rho_T(0.0, 298.15), 8.8997e-6, REL_TOL_EXTERNAL_VALUE);
  REL_TEST(_fp->mu_from_rho_T(0.68911, 350.0), 9.9645e-6, tol);
  REL_TEST(_fp->mu_from_rho_T(6.5764, 350.0), 1.0147e-5, tol);
 
  REL_TEST(_fp->mu_from_p_T(1.0e6, 350.0), 9.9645e-6, tol);
  REL_TEST(_fp->mu_from_p_T(10.0e6, 350.0), 1.0147e-5, tol);
}