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thermoPhysicalModels/.../hConstThermo, eConstThermo: Added reference state

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The hRefConst and eRefConst thermos that were local to
reacting*EulerFoam have been removed and the reference state that they
used has been incorporated into the standard hConst and eConst thermos.

The hConst thermo model now evaluates the enthalpy like so:

    Ha = Hf + Hs
       = Hf + Cp*(T - Tref) + Hsref (+ equation of state terms)

Where Ha is absolute enthalpy, Hs is sensible enthalpy, Cp is specific
heat at constant pressure, T is temperature, Tref is a reference
temperature and Hsref is a reference sensible enthalpy. Hf, Cp, Tref and
Hsref are user inputs. Of these, Tref and Hsref are new. An example
specification is as follows:

    thermodynamics
    {
        Hf          -1.34229e+07;
        Cp          2078.4;
        Tref        372.76;
        Hsref       128652;
    }

The ref quantities allows the user to specify a state around which to
linearise the relationship between temperature and enthalpy. This is
useful if the temperature range of the simulation is small enough to
consider the relationship linear, but linearity does not hold all the
way to standard conditions.

To maintain backwards compatibility, Tref defaults to standard
temperature, and Hsref defaults to zero, so a case using hConst thermo
requires no modification as a result of this change.

The only change to the default operation is that to calculate sensible
enthalpy Cp is multiplied by the difference between the current
temperature and the standard temperature, whether as previously Cp was
multiplied by the current temperature only. This means that at standard
conditions sensible enthalpy is now zero, and absolute enthalpy equals
the formation enthalpy. This is more consistent with the definitions of
the various enthalpies, and with other thermo models such as janaf. This
change should only affect reacting cases that use constant thermo
models.
This commit is contained in:
Will Bainbridge
2020-02-27 16:57:55 +00:00
parent 6061ed363f
commit 88405e4c94
28 changed files with 220 additions and 1641 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
tutorials/multiphase/reactingMultiphaseEulerFoam/RAS/wallBoilingPolydisperseTwoGroups/constant/thermophysicalProperties.gas
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
@ -38,7 +38,7 @@ mixture
Hf 0;
Cv 1252;
Tref 359.981;
Eref 363410;
Esref 363410;
}
transport
{

4
tutorials/multiphase/reactingMultiphaseEulerFoam/RAS/wallBoilingPolydisperseTwoGroups/constant/thermophysicalProperties.gas2
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
@ -38,7 +38,7 @@ mixture
Hf 0;
Cv 1252;
Tref 359.981;
Eref 363410;
Esref 363410;
}
transport
{

4
tutorials/multiphase/reactingMultiphaseEulerFoam/RAS/wallBoilingPolydisperseTwoGroups/constant/thermophysicalProperties.liquid
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState rhoConst;
specie specie;
energy sensibleInternalEnergy;
@ -42,7 +42,7 @@ mixture
Hf 0;
Cv 1394.5;
Tref 359.981;
Eref 290090;
Esref 290090;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoiling/constant/thermophysicalProperties.gas
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
@ -38,7 +38,7 @@ mixture
Hf 0;
Cv 1252;
Tref 359.981;
Eref 363410;
Esref 363410;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoiling/constant/thermophysicalProperties.liquid
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState rhoConst;
specie specie;
energy sensibleInternalEnergy;
@ -42,7 +42,7 @@ mixture
Hf 0;
Cv 1394.5;
Tref 359.981;
Eref 290090;
Esref 290090;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoilingIATE/constant/thermophysicalProperties.gas
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
@ -38,7 +38,7 @@ mixture
Hf 0;
Cv 1252;
Tref 359.981;
Eref 363410;
Esref 363410;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoilingIATE/constant/thermophysicalProperties.liquid
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState rhoConst;
specie specie;
energy sensibleInternalEnergy;
@ -42,7 +42,7 @@ mixture
Hf 0;
Cv 1394.5;
Tref 359.981;
Eref 290090;
Esref 290090;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoilingPolydisperse/constant/thermophysicalProperties.gas
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
@ -38,7 +38,7 @@ mixture
Hf 0;
Cv 1252;
Tref 359.981;
Eref 363410;
Esref 363410;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoilingPolydisperse/constant/thermophysicalProperties.liquid
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState rhoConst;
specie specie;
energy sensibleInternalEnergy;
@ -42,7 +42,7 @@ mixture
Hf 0;
Cv 1394.5;
Tref 359.981;
Eref 290090;
Esref 290090;
}
transport
{

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/constant/thermophysicalProperties.steam
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo hRefConst;
thermo hConst;
equationOfState perfectGas;
specie specie;
energy sensibleEnthalpy;
@ -42,7 +42,7 @@ mixture
Hf 0;
Cp 2078.4;
Tref 372.76;
Href 2675500;
Hsref 2675500;
}
transport

4
tutorials/multiphase/reactingTwoPhaseEulerFoam/laminar/steamInjection/constant/thermophysicalProperties.water
View File

@ -20,7 +20,7 @@ thermoType
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eRefConst;
thermo eConst;
equationOfState rPolynomial;
specie specie;
energy sensibleInternalEnergy;
@ -45,7 +45,7 @@ mixture
Hf 0;
Cv 4195;
Tref 372.76;
Eref 417500;
Esref 417500;
}
transport