OpenFOAM® v1712: New and improved post-processing
Field entry using wildcards
Many OpenFOAM applications operate on a subset of the available fields, specified using a fields keyword entry. This has been extended to accept wild-card entries for the following function objects:
- fieldMinMax: field minima and maxima
- residual: solver residuals
- fieldCoordinateSystemTransform: field transformations
when using a dictionary format, e.g.
fields (".Mean" U k epsilon); // any field ending with Mean and has single character in the front (e.g. pMean), and fields U, k, epsilon
Updated noise utility
The noise utility now supports data sets of arbitrary length, removing the constraint of samples.
- Source code
- $FOAM_UTILITIES/postProcessing/noise
ParaView and VTK improvements
This release includes improvements to the ParaView paraFoam reader module:
- supports multiple Lagrangian clouds
- support for finite area fields
and the foamToVTK utility:
- support for finite area fields
- new -cellZone option
- faster field loading
New field averaging options
The fieldAverage function object has been extended to support multiple windowing types via the new optional windowType keyword, where:
- none : windowing is deactivated
- approximate : windowing is approximate, e.g. for a window of size 5, the
window average is calculated as
Note: this recovers the behaviour of OpenFOAM v1706 and earlier
- exact : stores all window fields to generate an exact window average, e.g. for a window of size 5 with uniform step size, the window average is calculated as:
Note that the exact option requires all fields within the window to be stored, and therefore requires more memory (potentially very large) to operate. To enable a clean restart it is also necessary to write all of these fields to disk, which again can generate a lot of data. If users do not wish to write all the window fields, the allowRestart can be set to no/off.
The following shows an example of an exact window average of the U field, using a window size of 10s without restart enabled:
{
type fieldAverage;
libs ("libfieldFunctionObjects.so");
writeControl writeTime;
restartOnRestart false;
restartOnOutput false;
periodicRestart false;
fields
(
U
{
mean on;
prime2Mean on;
base time;
windowType exact;
window 10.0;
windowName w1;
allowRestart no;
}
);
}
- Source code
- $FOAM_SRC//functionObjects/field/fieldAverage