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Improved viscosity model for hydrogen.

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Model from Muzney et al., J. Chem. Eng. Data 2013, 58, 4, 969–979 implemented. Same as NIST and Coolprop.
This commit is contained in:
Svenn Tveit
2023-08-14 12:31:01 +02:00
parent f95cbea921
commit c6cd71df08
2 changed files with 69 additions and 27 deletions
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11
tests/material/test_components.cpp
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@@ -697,9 +697,12 @@ BOOST_AUTO_TEST_CASE_TEMPLATE(H2Class, Scalar, Types)
Evaluation T;
Evaluation p;
// Extrapolate table
bool extrapolate = true;
// Rel. diff. tolerance
Scalar tol = 1e-2;
Scalar tol_visc = 30e-2; // use tol once a better viscosity model is implemented
Scalar tol_visc = 2.6e-2;
// Loop over temperature and pressure, and compare to reference values in JSON file
for (int iT = 0; iT < numT; ++iT) {
@@ -711,7 +714,7 @@ BOOST_AUTO_TEST_CASE_TEMPLATE(H2Class, Scalar, Types)
p = Evaluation(pres_ref.get_array_item(iP).as_double());
// Density
Scalar dens = H2::gasDensity(T, p).value();
Scalar dens = H2::gasDensity(T, p, extrapolate).value();
Json::JsonObject dens_ref_row = density_ref.get_array_item(iT);
Scalar dens_ref = Scalar(dens_ref_row.get_array_item(iP).as_double());
@@ -720,7 +723,7 @@ BOOST_AUTO_TEST_CASE_TEMPLATE(H2Class, Scalar, Types)
"} exceeds tolerance {"<<tol<<"} at (T, p) = ("<<T.value()<<", "<<p.value()<<")");
// Viscosity
Scalar visc = H2::gasViscosity(T, p).value();
Scalar visc = H2::gasViscosity(T, p, extrapolate).value();
Json::JsonObject visc_ref_row = viscosity_ref.get_array_item(iT);
Scalar visc_ref = Scalar(visc_ref_row.get_array_item(iP).as_double());
@@ -729,7 +732,7 @@ BOOST_AUTO_TEST_CASE_TEMPLATE(H2Class, Scalar, Types)
"} exceeds tolerance {"<<tol_visc<<"} at (T, p) = ("<<T.value()<<", "<<p.value()<<")");
// Enthalpy
Scalar enthalpy = H2::gasEnthalpy(T, p).value();
Scalar enthalpy = H2::gasEnthalpy(T, p, extrapolate).value();
Json::JsonObject enth_ref_row = enthalpy_ref.get_array_item(iT);
Scalar enth_ref = Scalar(enth_ref_row.get_array_item(iP).as_double());