The volumeFractionSource represents the effect of a reduction in the
volume of the domain due to the presence of a stationary phase, most
likely a solid porous media. It only represents the dynamic effects
associated with the reduction in volume; it does not does not model
loss, drag or heat transfer. Separate models (e.g., the existing
porosity models) will be necessary to represent these effects. An
example usage, in system/fvOptions, is as follows:
volumeFraction
{
type volumeFractionSource;
phase solid;
phi phi;
rho rho;
U U;
fields (rho U e);
}
The volume fraction will be read from constant/alpha.<phase>, and must
be generated in advance using setFields or a function object. Note that
the names of the flux, density (if compressible) and velocity must all
be specified. Every field for which a transport equation is solved
should also be specified in the "fields" entry.
The solidEquilibriumEnergySource adds the thermal inertia and diffusive
characteristics of a stationary solid phase to the energy equation of
the fluid, assuming that the two phases are in thermal equilibrium. An
example usage is as follows:
solidEqulibriumEnergy
{
type solidEqulibriumEnergySource;
phase solid;
field e;
}
This will read the volume fraction in the same way as the
volumeFractionSource option. In addition, thermal properties of the
solid will be constructed from settings in
system/thermophysicalProperties.<phase>.
Two tutorials have been added, demonstrating use of these options in
both incompressible and compressible simulations. These are
incompressible/pimpleFoam/laminar/blockedChannel and
compressible/rhoPimpleFoam/laminar/blockedChannel.
8803a89407