The implementation of the optional non-uniform transformations in coupled
patches was based on transform property lists which could be either length 0 for
no transformation, 1 for uniform transformation or n-faces for non-uniform
transformation. This complexity was maintenance nightmare but kept to support
the hack in the original film implementation to partially work around the
conservation error. Now that film has been re-implemented in fully mass
conservative form this unphysical non-uniform transformation support is no
longer needed and the coupled patch transformations have been completely
refactored to be simpler and more rational with single values for the
transformation properties and boolians to indicate which transformations are
needed.
When selecting fields with complex automatically generated names it is
cumbersome to escape all the regular expression meta characters and more
convenient to specify the name as a literal string, the new regExp option
provides the ability to switch the regular expression support and defaults to
true for backward compatibility.
For example to cache and write out an intermediate temporary field generated by
the kOmegaSST model:
cacheTemporaryObjects
(
"((interpolate(((1|((1|(1|A(U)))-H(1)))-(1|A(U))))*snGrad(p))*magSf)"
);
functions
{
#includeFunc writeObjects(regExp=off, "((interpolate(((1|((1|(1|A(U)))-H(1)))-(1|A(U))))*snGrad(p))*magSf)")
}
The regExp option can also be specified in a writeObjects dict as
regExp off;
Additionally regular expression support has been added to the includeFunc
argument parsing.
The kOmegaSSTSata model can now be used in multiphase cases, provided
that there is a single, well defined continuous phase. As previously,
the continuous phase is the phase for which the model is selected (i.e.,
in the constant/turbulenceProperties.<continuous-phase-name>
dictionary).
By default, now, all other moving phases are considered to be dispersed
bubble phases, and the effect of all of them is summed to calculate the
overall bubble induced turbulence.
This behaviour can be overridden by means of a "dispersedPhases" entry,
which takes a list of the phases to be considered dispersed by the
model.
Patch contributed by Timo Niemi, VTT.
The correction of thermodynamics, reactions, and the enforcement of the
specie fraction sum are now done in the same sequence as other reacting
solvers.
Patch contributed by Juho Peltola, VTT.
All of the film transport equations are now formulated with respect to the film
volume fraction in the region cell layer rather than the film thickness which
ensures mass conservation of the film even as it flows over curved surfaces and
around corners. (In the previous formulation the conservation error could be as
large as 15% for a film flowing around a corner.)
The film Courant number is now formulated in terms of the film cell volumetric
flux which avoids the stabilised division by the film thickness and provides a
more reliable estimate for time-step evaluation. As a consequence the film
solution is substantially more robust even though the time-step is now
significantly higher. For film flow dominated problem the simulations now runs
10-30x faster.
The inconsistent extended PISO controls have been replaced by the standard
PIMPLE control system used in all other flow solvers, providing consistent
input, a flexible structure and easier maintenance.
The momentum corrector has been re-formulated to be consistent with the momentum
predictor so the optional PIMPLE outer-corrector loop converges which it did not
previously.
nonuniformTransformCyclic patches and corresponding fields are no longer needed
and have been removed which paves the way for a future rationalisation of the
handling of cyclic transformations in OpenFOAM to improve robustness, usability
and maintainability.
Film sources have been simplified to avoid the need for fictitious boundary
conditions, in particular mappedFixedPushedInternalValueFvPatchField which has
been removed.
Film variables previously appended with an "f" for "film" rather than "face"
have been renamed without the unnecessary and confusing "f" as they are
localised to the film region and hence already directly associated with it.
All film tutorials have been updated to test and demonstrate the developments
and improvements listed above.
Henry G. Weller
CFD Direct Ltd.
Corrected call to model2In1 in one of the evaluate methods
Patch contributed by Institute of Fluid Dynamics,
Helmholtz-Zentrum Dresden - Rossendorf (HZDR)
When operating on multi-region cases, function files are now searched
for in the following order:
- First the $FOAM_CASE/system/<region> directory is searched
- Second the $FOAM_CASE/system directory is searched
- Finally a search is done through the preconfigured functions in
$WM_PROJECT_DIR/etc
Previously, in a multi-region case, preconfigured objects were
considered before those in the case's (non-region) system directory.
This was considered counter-intuitive. Functions residing in the system
directory should always take precedence, whether they are in the region
subdirectory or not.
This reduces code duplication within heheuPsiThermo. This also resolves
a Clang floating point error issue associated with loop vectorisation.
See commit 9675107f for the corresponding fix to heThermo.
This change formalises the usage of the "log" keyword in function
objects. By default, logging to stdout is activated when running
"postProcess" or "<solver> -postProcess", and deactivated when a
function is being executed as part of a run.
This behaviour can now be overridden in the function object dictionary
when operating in either mode.
The initialisation of energy in heThermo has been rewritten to use the
"he" method.
This has had the effect of resolving a floating point error in the
initialisation by disabling Clang's vectorisation of the loop in which
cell values of energy are calculated from the temperature field.
