Refactored the function for scaling the size group volume fractions to
better handle situations in which their sum drifts away from unity.
Scaling is now turned on by default, and can be turned off in the
solution dictionary for the population balance.
Additional revision and renaming of *Polydisperse tutorials
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
Removed unnecessary clutter in header descriptions for models that are
only required for testing purposes.
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
This fix also required a generalization of the corresponding base class,
which allows the user to specify the number of daughter particles per
breakup event separately.
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
Following this commit, a coalescence event leading to a size larger than
that of the last size group is not discarded anymore, but leads to an
accumulation of volume fraction in the last size group.
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
All wall functions now operate collaboratively, obtaining the Cmu, kappa and E
coefficients and yPlusLam from the nutWallFunction base class. Now these
optional inputs need only be specified in the nut boundary condition with the k,
epsilon, omega, v2 and f wall functions obtaining these values from there. This
is much simpler to specify and avoids inconsistencies in the operation of the
wall functions for the different turbulence fields.
The code has also been rationalised and simplified avoiding unnecessary code
and duplication.
Currently these deleted function declarations are still in the private section
of the class declarations but will be moved by hand to the public section over
time as this is too complex to automate reliably.
Replaced all uses of complex Xfer class with C++11 "move" constructors and
assignment operators. Removed the now redundant Xfer class.
This substantial changes improves consistency between OpenFOAM and the C++11 STL
containers and algorithms, reduces memory allocation and copy overhead when
returning containers from functions and simplifies maintenance of the core
libraries significantly.
Implementation of the Giesekus model for visco-elasticity, derived from the new
generalised form of the Maxwell model which now support additional sources.
Giesekus, H., 1982.
A simple constitutive equation for polymer fluids based on the
concept of deformation-dependent tensional mobility.
J. Non-Newton. Fluid. 11, 69–109.
This implementation is instantiated for incompressible, compressible and VoF
two-phase flow.
For most steady cases simpleFoam is likely to converge faster than pimpleFoam
with LTS but this capability may be useful for testing meshes, BCs etc. for more
complex solver for which SIMPLE is not stable and LTS is provided instead.
With the selection of the Boussinesq equation of state the general buoyancy
solvers buoyantSimpleFoam and buoyantPimpleFoam can be used instead of the
specialised Boussinesq solvers avoiding the need for special implementation of
thermal and pressure boundary conditions and providing support for radiation and
fvOptions which would not have been feasible or practical in the Boussinesq
solvers.
Other incompressible equations of state are also supported; for most gaseous
problems the incompressiblePerfectGas equation of state is likely to be more
accurate than the Boussinesq equation of state.
The buoyantBoussinesq[SP]impleFoam tutorials have been updated and moved to the
corresponding buoyant[SP]impleFoam directories.
This switch should be on for phi-correction within the time loop, where
the correction simply serves to keep the phi-field up to date before the
U-equation is solved. It should be off for initialisation
phi-correction, as the necessary data to update the conditions may not
yet exist.
Resolves bug report https://bugs.openfoam.org/view.php?id=3198
The writeEntry form is now defined and used consistently throughout OpenFOAM
making it easier to use and extend, particularly to support binary IO of complex
dictionary entries.
The sub-loops of the solution control are now named more consistently,
with ambiguously named methods such as finalIter replaced with ones
like finalPimpleIter, so that it is clear which loop they represent.
In addition, the final logic has been improved so that it restores state
after a sub-iteration, and so that sub-iterations can be used on their
own without an outer iteration in effect. Previously, if the
non-orthogonal loop were used outside of a pimple/piso iteration, the
final iteration would not execute with final settings.
The radiation modelling library has been moved out of
thermophysicalProperties into the top-level source directory. Radiation
is a process, not a property, and belongs alongside turbulence,
combustion, etc...
The namespaces used within the radiation library have been made
consistent with the rest of the code. Selectable sub-models are in
namespaces named after their base classes. Some models have been
renamed remove the base type from the suffix, as this is unnecessary.
These renames are:
Old name: New name:
binaryAbsorptionEmission binary
cloudAbsorptionEmission cloud
constantAbsorptionEmission constant
greyMeanAbsorptionEmission greyMean/greyMeanCombustion
greyMeanSolidAbsorptionEmission greyMeanSolid
wideBandAbsorptionEmission wideBand/wideBandCombustion
cloudScatter cloud
constantScatter constant
mixtureFractionSoot mixtureFraction
Some absorption-emission models have been split into versions which do
and don't use the heat release rate. The version that does has been
given the post-fix "Combustion" and has been moved into the
combustionModels library. This removes the dependence on a registered
Qdot field, and makes the models compatible with the recent removal of
that field from the combustion solvers.
The advantage of using this constructor for user-input dimensioned model
parameters is that it handles a variety of input; from just the value to
the full name-dimensions-value set. As more is specified, more is
checked.
Some other minor formatting improvements to the reactingEulerFoam
sub-modeling libraries have also been made.
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
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 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.
