- local data to be written is now transferable into the
OFstreamCollator. This avoids making a full copy when threading is
active.
- use plain lists for managing proc data
* storage: List<List<char>> instead of PtrList<List<char>>
* views: List<stdFoam::span<char>> instead of PtrList<SubList<char>>
- use gather/write (unthreaded) as backstop if the output is too big
to fit in the buffer size. Emit warning instead of FatalError
- OCharStream for serializing
- skip intermediate blocks without reading
- support character spans
- read and distribute with direct non-blocking send/recv
instead of PstreamBuffers or with IPstream/OPstream streaming
operators.
- non-blocking gather/write when using intermediate buffer space
- use OCharStream instead of OStringStream to avoid copying char data.
- direct non-blocking send/recv with probing instead of PstreamBuffers
to avoid serialization/de-serialization of char data and reduce the
memory footprint somewhat.
- polling dispatch to write file content as it becomes available,
which should improve communication and IO overlap
- PLOAD2 is a reasonable default and PLOAD4 output
(currently misused for vectors/tensors) is the exception.
- simplify the specification by using optional PLOAD4, PLOAD2 wordRes
lists to act as allow/deny selectors. In the regular case won't need
to specify anything or perhaps only the PLOAD4 list.
ENH: atomic creation of Nastran files
FIX: inconsistent Nastran surface output format
- use FREE format by default. Previously had an odd mix of SHORT
format when created without options and LONG format (as default)
when created with format options.
Creates view factors for the view factor radiation model.
User-selectable models:
- raySearchEngine: model to generate rays, i.e. face-to-face connections
- viewFactorModel: model to compute the view factors
For visualisation, use:
- Write the view factors as a volume field
writeViewFactors yes;
- Write the rays using OBJ format:
writeRays yes; // default = no
Participating patches must be in the \c vewFactorWall group, i.e. using the
\c inGroups entry of the "\<case\>/polyMesh/boundary" file.
\verbatim
myPatch
{
type wall;
inGroups 2(wall viewFactorWall);
...
}
\endverbatim
Reads:
- <constant>/viewFactorsDict : main controls
- <constant>/finalAgglom : agglomeration addressing (from faceAgglomerate)
Generates:
- <constant>/F : view factors (matrix)
- <constant>/mapDist : map used for parallel running
- <constant>/globalFaceFaces : face addressing
- can be useful for various orientation-related geometry or mesh
manipulations during pre-/post-processing:
* combine with linearDirection to achieve better extrusion results.
* orientation of transformations, blockMesh, result projections, ...
STYLE: minor code modernizations
Co-authored-by: Mark Olesen <>
- exprValueFieldTag is an extended version of exprValue,
with additional Field/List uniformity handling
- the exprValueFieldTag reduce() method provides a more efficient
method than using a regular combine operator. Since fields are
usually non-uniform, will mostly only need the bitwise reduce and
not a more expensive gather/combine.
ENH: output of exprValue (scalar type) now includes '.'
- prevents scalar/label ambiguity for values like '100.0', which would
otherwise be written as '100' and thus interpreted as a label value
when re-reading.
Based on the reference
Tomiyama, A., Kataoka, I., Zun, I., Sakaguchi, T. (1998)
Drag coefficients of single bubbles under normal and micro gravity
conditions
JSME International Journal, 41(2), 472-479.
Example usage
subModels
{
particleForces
{
tomiyamaDrag
{
sigma 0.07;
contamination pure; // pure | slight | full
}
}
}
