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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
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Class
Foam::liquidMixture
Description
A mixture of liquids.
The theory in this class is to a very large extent based on the book:
'The Properties of Gases & Liquids' 4th ed.
by Reid, Prausnitz and Poling
For now it does not do much, since the perfect gas equation is used.
The dictionary constructor searches for the entry @c liquidComponents,
which is a wordList. The liquid properties of each component can either
be contained within a @c liquidProperties sub-dictionary or (for legacy
purposes) can be found directly in the dictionary.
The @c liquidProperties sub-dictionary entry should be used when possible
to avoid conflicts with identically named gas-phase entries.
A simple example of a single-component liquidMixture:
@verbatim
liquidComponents
(
H2O
);
// the gas-phase species
species
(
AIR H2O
);
// thermo values from BurcatCpData
AIR
AIR 1 28.96518 // specie: name/nMoles/MolWt
200 6000 1000 // low/high/common temperature
3.0879272 0.0012459718 -4.2371895e-07 6.7477479e-11 -3.9707697e-15 -995.26275 5.9596093 // 7 upper Temp. coeffs
3.5683962 -0.00067872943 1.5537148e-06 -3.2993706e-12 -4.6639539e-13 -1062.3466 3.7158296 // 7 lower Temp. coeffs
1.4792e-06 116 // sutherlandTransport for AIR (STAR-CD)
;
H2O
H2O 1 18.01528 // specie: name/nMoles/MolWt
200 6000 1000 // low/high/common temperature
2.6770389 0.0029731816 -7.7376889e-07 9.4433514e-11 -4.2689991e-15 -29885.894 6.88255 // 7 upper Temp. coeffs
4.1986352 -0.0020364017 6.5203416e-06 -5.4879269e-09 1.771968e-12 -30293.726 -0.84900901 // 7 lower Temp. coeffs
1.4792e-06 116 // sutherlandTransport for AIR (STAR-CD)
;
liquidProperties
{
H2O H2O defaultCoeffs;
}
@endverbatim
\*---------------------------------------------------------------------------*/
#ifndef liquidMixture_H
#define liquidMixture_H
#include <OpenFOAM/word.H>
#include <OpenFOAM/scalarField.H>
#include <OpenFOAM/PtrList.H>
#include <liquids/liquid.H>
#include <OpenFOAM/autoPtr.H>
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class liquidMixture Declaration
\*---------------------------------------------------------------------------*/
class liquidMixture
{
// Private data
// maximum reduced temperature
static const scalar TrMax;
//- The names of the liquids
List<word> components_;
//- The liquid properties
PtrList<liquid> properties_;
public:
// Constructors
//- Construct from dictionary
liquidMixture
(
const dictionary&
);
// Selectors
//- Select construct from dictionary
static autoPtr<liquidMixture> New
(
const dictionary&
);
// Member Functions
inline const List<word>& components() const
{
return components_;
}
//- Return the liquid properties
inline const PtrList<liquid>& properties() const
{
return properties_;
}
//- Calculate the critical temperature of mixture
scalar Tc(const scalarField& x) const;
//- Return pseudocritical temperature according to Kay's rule
scalar Tpc(const scalarField& x) const;
//- Return pseudocritical pressure (modified Prausnitz and Gunn)
scalar Ppc(const scalarField& x) const;
//- Return mixture accentric factor
scalar omega(const scalarField& x) const;
//- Return the surface molar fractions
scalarField Xs
(
const scalar p,
const scalar Tg,
const scalar Tl,
const scalarField& xg,
const scalarField& xl
) const;
//- Calculate the mean molecular weight [kg/kmol]
// from mole fractions
scalar W(const scalarField& x) const;
//- Returns the mass fractions, given mole fractions
scalarField Y(const scalarField& X) const;
//- Returns the mole fractions, given mass fractions
scalarField X(const scalarField& Y) const;
//- Calculate the mixture density [kg/m^3]
scalar rho
(
const scalar p,
const scalar T,
const scalarField& x
) const;
//- Calculate the mixture vapour pressure [Pa]
scalar pv
(
const scalar p,
const scalar T,
const scalarField& x
) const;
//- Calculate the mixture latent heat [J/kg]
scalar hl
(
const scalar p,
const scalar T,
const scalarField& x
) const;
//- Calculate the mixture heat capacity [J/(kg K)]
scalar cp
(
const scalar p,
const scalar T,
const scalarField& x
) const;
//- Estimate mixture surface tension [N/m]
scalar sigma
(
const scalar p,
const scalar T,
const scalarField& x
) const;
//- Calculate the mixture viscosity [Pa s]
scalar mu
(
const scalar p,
const scalar T,
const scalarField& x
) const;
//- Estimate thermal conductivity [W/(m K)]
// Li's method, Eq. 10-12.27 - 10.12-19
scalar K
(
const scalar p,
const scalar T,
const scalarField& x
) const;
scalar D
(
const scalar p,
const scalar T,
const scalarField& x
) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************ vim: set sw=4 sts=4 et: ************************ //
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