The keyword which selects how the subset over which the function
operates is generated has been renamed to "selectionMode", to make it
more consistent with other parts of the OpenFOAM (e.g., fvOptions). It
can still take the value "all" or "cellZone". A cell zone is now
specified with a "cellZone", again for consistency.
Error messaging has also been overhauled.
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
Added the breakup and coalescence models of Lehr et al. (2002), and the
coalescence model of Luo (1993).
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
Prior to this commit, the drift term implementation was invalid for a
ratio x_{i+1}/x_i >= 2 between the characteristic volumes of two
subsequent size groups.
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
References:
Luo, H., & Svendsen, H. F. (1996).
Theoretical model for drop and bubble breakup in turbulent dispersions.
AIChE Journal, 42(5), 1225-1233.
Eq. 27, p. 1229.
Bannari, R., Kerdouss, F., Selma, B., Bannari, A., & Proulx, P. (2008).
Three-dimensional mathematical modeling of dispersed two-phase flow
using class method of population balance in bubble columns.
Computers & chemical engineering, 32(12), 3224-3237.
Eq. 49, p. 3230.
Patch contributed by Institute of Fluid Dynamics, Helmholtz-Zentrum
Dresden - Rossendorf (HZDR)
The dynamic code functionality has been generalised so that the names of
the code entries in the specifying dictionary can be set by the caller.
This means that functions which utilise dynamic code but use different
entry names (e.g., codedFunctionObject uses codeExecute, codeEnd,
etc..., instead of code) now function correctly. The differently named
entries now form part of the library hash, and re-building triggers
appropriately as they are modified.
Face merging in the layer addition phase can now be controlled at a
per-patch level. By default, faces that are connected to the same cell
and patch, and which do not differ in orientation by more than the
planar angle, are merged if the patch they belong to is associated with
meshed geometry. This has not changed, but it can now be overridden with
a new "mergeFaces" keyword. This can be set in addLayersControls to
control the default behaviour on all patches, and it can be overridden
in the layer settings associated with each patch. For example:
addLayersControls
{
mergeFaces true; // <-- Merge faces on all patches, not just those
// associated with geometry
layers
{
wall1
{
nSurfaceLayers 2;
}
wall2
{
nSurfaceLayers 2;
mergeFaces false; // <-- Do not merge faces on this patch
}
}
}
In addition, the patch-association has been fixed so that faces are no
longer merged on patches which are set not to merge, but are
cell-connected to patches which are.
This change makes it possible to guarantee that the surface mesh retains
the same geometry before and after layer addition, and therefore add
layers to coupled interfaces.
The new patch field mapping class timeVaryingMappedFvPatchField has been
factored out of the timeVaryingMappedFixedValueFvPatchField BC so that it can be
used to map data onto fields stored within other BCs.
In the process the writeEntryIfDifferent function had to be moved from
fvPatchField to dictionary so that it can still be used in the
timeVaryingMappedFvPatchField class and it made good sense to create the
non-conditional variant writeEntry to simplify the patch field write functions.
This rationalisation has been propagated all other patch fields.
A number of improvements have been made to the population balance phase
change drift model.
- The model now checks the ordering of the phase pairs and changes the
sign of the drift rate accordingly.
- The phase change mass flux and weights are calculated for each
velocity group, so the drift rate and phase change mass flux should be
consistent for each velocity group.
- By default the phase change mass flux is distributed between the size
groups based on the interfacial area of each group. For backward
compatibility number weighting can be enabled with a new
"numberWeighted" option.
The model now requires the user to provide a list of phase pairs in the
usual parenthesised form, rather than using the name. For example:
phaseChange
{
pairs ((gas and liquid));
}
Patch contributed by Juho Peltola, VTT.
The stabilisation term for the heat transfer with the interface
temperature has been changed to mirror the local heat transfer in the
phase, rather than an effective heat transfer across both phases. This
makes the stabilisation term match the actual temperature-based transfer
terms more accurately. The difference is particularly significant when
the mass transfer rate is high, and cases of this type gain a
significant stability benefit from this change as a result.
Patch contributed by Juho Peltola, VTT.
Latent heat is now evaluated at Tsat instead of Tf for the thermal phase
change method. This provides a smooth transition of the interface
temperature field as the phase fraction tends to zero.
Patch contributed by Juho Peltola, VTT.
The phase which the function object relates to is now selected with the
keyword "phase", rather than "phaseName". This is consistent with other
name entries such as the "phi" entry for an inletOutlet boundary.
The Qdot field has been removed from all reacting solvers, in favour of
computing on the fly whenever it is needed. It can still be generated
for post-processing purposes by means of the Qdot function object. This
change reduces code duplication and storage for all modified solvers.
The Qdot function object has been applied to a number of tutorials in
order to retain the existing output.
A fix to Qdot has also been applied for multi-phase cases.
This function object writes out the heat release rate field for a
combustion model. This is useful for solvers where combustion is
optional, and which do not therefore write out the heat release rate by
default; e.g., chtMultiRegionFoam and reactingTwoPhaseEulerFoam.
The tutorial has been converted from two-dimensions to a wedge and the
flow has been swirl stabilised. The turbulence parameters have been made
physical. The transport schemes have been increased to second order. The
reaction mechanism has been changed to one from a publically accessible
reference. The gas thermodynamics have been made incompressible, and the
pressure offset around zero, which improves the behaviour of the
pressure solution.
The motion solvers are executed in order and the resulting displacements
accumulated into an overall displacement and the displaced point positions
returned.
This functionality replaces the dynamicMotionSolverListFvMesh class with the
equivalent specification of a "solvers" list rather than a "solver" entry in
dynamicMeshDict e.g.
dynamicFvMesh dynamicMotionSolverFvMesh;
solvers
(
Rotor
{
solver solidBody;
solidBodyCoeffs
{
cellZone region1;
solidBodyMotionFunction rotatingMotion;
rotatingMotionCoeffs
{
origin (0 0 0);
axis (0 0 1);
omega 100; // rad/s
}
}
}
Piston
{
solver velocityComponentLaplacian;
motionSolverLibs ("libfvMotionSolvers.so");
velocityComponentLaplacianCoeffs
{
component z;
diffusivity inverseDistance 1(wall1);
}
}
);
Added headers to all reactions files to prevent warnings in paraview.
Added references for known mechanisms. Removed unused reaction and
thermophysical property files.
to rationalise the structure and class names to avoid the need for the confusing
addNamedToRunTimeSelectionTable and use instead use the standard
addToRunTimeSelectionTable to populate the run-time selection table.
This is a heat transfer model with a constant fixed value for the
Nusselt number. It requires a single "Nu" entry to be specified.
Patch contributed by Juho Peltola, VTT
