A set of routines for cutting polyhedra have been added. These can cut
polyhedral cells based on the adjacent point values and an iso-value
which defines the surface. The method operates directly on the
polyhedral cells; it does not decompose them into tetrahedra at any
point. The routines can compute the cut topology as well as integrals of
properties above and below the cut surface.
An iso-surface algorithm has been added based on these polyhedral
cutting routines. It is significantly more robust than the previous
algorithm, and produces compact surfaces equivalent to the previous
algorithm's maximum filtering level. It is also approximately 3 times
faster than the previous algorithm, and 10 times faster when run
repeatedly on the same set of cells (this is because some addressing is
cached and reused).
This algorithm is used by the 'isoSurface', 'distanceSurface' and
'cutPlane' sampled surfaces.
The 'cutPlane' sampled surface is a renaming of 'cuttingPlane' to make
it consistent with the corresponding packaged function. The name
'cuttingPlane' has been retained for backwards compatibility and can
still be used to select a 'cutPlane' surface. The legacy 'plane' surface
has been removed.
The 'average' keyword has been removed from specification of these
sampled surfaces as cell-centred values are no longer used in the
generation of or interpolation to an iso-surface. The 'filtering'
keyword has also been removed as it relates to options within the
previous algorithm. Zone support has been reinstated into the
'isoSurface' sampled surface. Interpolation to all these sampled
surfaces has been corrected to exactly match the user-selected
interpolation scheme, and the interpolation procedure no longer
unnecessarily re-generates data that is already available.
Description
User convenience class to handle the input of time-varying rotational speed
in rad/s if \c omega is specified or rpm if \c rpm is specified.
Usage
For specifying the rotational speed in rpm of an MRF zone:
\verbatim
MRF
{
cellZone rotor;
origin (0 0 0);
axis (0 0 1);
rpm 60;
}
\endverbatim
or the equivalent specified in rad/s:
\verbatim
MRF
{
cellZone rotor;
origin (0 0 0);
axis (0 0 1);
rpm 6.28319;
}
\endverbatim
or for a tabulated ramped rotational speed of a solid body:
\verbatim
mover
{
type motionSolver;
libs ("libfvMeshMovers.so" "libfvMotionSolvers.so");
motionSolver solidBody;
cellZone innerCylinder;
solidBodyMotionFunction rotatingMotion;
origin (0 0 0);
axis (0 1 0);
rpm table
(
(0 0)
(0.01 6000)
(0.022 6000)
(0.03 4000)
(100 4000)
);
}
\endverbatim
The following classes have been updated to use the new Function1s::omega class:
solidBodyMotionFunctions::rotatingMotion
MRFZone
rotatingPressureInletOutletVelocityFvPatchVectorField
rotatingTotalPressureFvPatchScalarField
rotatingWallVelocityFvPatchVectorField
and all tutorials using these models and BCs updated to use rpm where appropriate.
executed with foamRun for single region simulations of foamMultiRun for
multi-region simulations. Replaces pimpleFoam, pisoFoam and simpleFoam and all
the corresponding tutorials have been updated and moved to
tutorials/modules/incompressibleFluid.
Class
Foam::solvers::incompressibleFluid
Description
Solver module for steady or transient turbulent flow of incompressible
isothermal fluids with optional mesh motion and change.
Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
pseudo-transient and steady simulations.
Optional fvModels and fvConstraints are provided to enhance the simulation
in many ways including adding various sources, constraining or limiting
the solution.
Reference:
\verbatim
Greenshields, C. J., & Weller, H. G. (2022).
Notes on Computational Fluid Dynamics: General Principles.
CFD Direct Ltd.: Reading, UK.
\endverbatim
SourceFiles
incompressibleFluid.C
See also
Foam::solvers::fluidSolver
Foam::solvers::isothermalFluid
