a5ea0b41f1
The interface for fvModels has been modified to improve its application
to "proxy" equations. That is, equations that are not straightforward
statements of conservation laws in OpenFOAM's usual convention.
A standard conservation law typically takes the following form:
fvMatrix<scalar> psiEqn
(
fvm::ddt(alpha, rho, psi)
+ <fluxes>
==
<sources>
);
A proxy equation, on the other hand, may be a derivation or
rearrangement of a law like this, and may be linearised in terms of a
different variable.
The pressure equation is the most common example of a proxy equation. It
represents a statement of the conservation of volume or mass, but it is
a rearrangement of the original continuity equation, and it has been
linearised in terms of a different variable; the pressure. Another
example is that in the pre-predictor of a VoF solver the
phase-continuity equation is constructed, but it is linearised in terms
of volume fraction rather than density.
In these situations, fvModels sources are now applied by calling:
fvModels().sourceProxy(<conserved-fields ...>, <equation-field>)
Where <conserved-fields ...> are (alpha, rho, psi), (rho, psi), just
(psi), or are omitted entirely (for volume continuity), and the
<equation-field> is the field associated with the proxy equation. This
produces a source term identical in value to the following call:
fvModels().source(<conserved-fields ...>)
It is only the linearisation in terms of <equation-field> that differs
between these two calls.
This change permits much greater flexibility in the handling of mass and
volume sources than the previous name-based system did. All the relevant
fields are available, dimensions can be used in the logic to determine
what sources are being constructed, and sources relating to a given
conservation law all share the same function.
This commit adds the functionality for injection-type sources in the
compressibleVoF solver. A following commit will add a volume source
model for use in incompressible solvers.
81 lines
1.5 KiB
C++
81 lines
1.5 KiB
C++
rho = thermo.rho();
|
|
|
|
volScalarField rAU(1.0/UEqn.A());
|
|
volVectorField HbyA(constrainHbyA(invA & UEqn.H(), U, p));
|
|
|
|
if (pimple.transonic())
|
|
{
|
|
surfaceScalarField phid
|
|
(
|
|
"phid",
|
|
fvc::interpolate(psi)
|
|
*(
|
|
fvc::flux(HbyA)
|
|
+ fvc::interpolate(betav*rho*rAU)*fvc::ddtCorr(rho, U, phi)
|
|
/fvc::interpolate(rho)
|
|
)
|
|
);
|
|
|
|
while (pimple.correctNonOrthogonal())
|
|
{
|
|
fvScalarMatrix pEqn
|
|
(
|
|
betav*fvm::ddt(psi, p)
|
|
+ fvm::div(phid, p)
|
|
- fvm::laplacian(rho*invA, p)
|
|
==
|
|
betav*fvModels.sourceProxy(rho, p)
|
|
);
|
|
|
|
pEqn.solve();
|
|
|
|
if (pimple.finalNonOrthogonalIter())
|
|
{
|
|
phi == pEqn.flux();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
surfaceScalarField phiHbyA
|
|
(
|
|
"phiHbyA",
|
|
(
|
|
fvc::flux(rho*HbyA)
|
|
+ fvc::interpolate(betav*rho*rAU)*fvc::ddtCorr(rho, U, phi)
|
|
)
|
|
);
|
|
|
|
while (pimple.correctNonOrthogonal())
|
|
{
|
|
fvScalarMatrix pEqn
|
|
(
|
|
betav*fvm::ddt(psi, p)
|
|
+ fvc::div(phiHbyA)
|
|
- fvm::laplacian(rho*invA, p)
|
|
==
|
|
betav*fvModels.sourceProxy(rho, p)
|
|
);
|
|
|
|
pEqn.solve();
|
|
|
|
if (pimple.finalNonOrthogonalIter())
|
|
{
|
|
phi = phiHbyA + pEqn.flux();
|
|
}
|
|
}
|
|
}
|
|
|
|
#include "rhoEqn.H"
|
|
#include "continuityErrs.H"
|
|
|
|
U = HbyA - (invA & (betav*fvc::grad(p)));
|
|
U.correctBoundaryConditions();
|
|
fvConstraints.constrain(U);
|
|
K = 0.5*magSqr(U);
|
|
|
|
if (thermo.dpdt())
|
|
{
|
|
dpdt = fvc::ddt(p);
|
|
}
|