- resets the output buffer completely - implementing what rewind was
likely meant to have accomplished for many use cases.
STYLE: OSHA1stream reset() for symmetry. Deprecate rewind().
- use allocator class to wrap the stream pointers instead of passing
them into ISstream, OSstream and using a dynamic cast to delete
then. This is especially important if we will have a bidirectional
stream (can't delete twice!).
STYLE:
- file stream constructors with std::string (C++11)
- for rewind, explicit about in|out direction. This is not currently
important, but avoids surprises with any future bidirectional access.
- combined string streams in StringStream.H header.
Similar to <sstream> include that has both input and output string
streams.
The 4.x tracking enforces reduced dimensionality on the parcels by
moving them to the centre of the mesh at the start of each track,
without considering the topology. This can leave the parcel outside it's
associated tetrahedron.
The barycentric algorithm isn't tolerant to incorrect topology, so
instead of changing position, it was written to track to the mesh
centre. This worked, but effectively doubled the number of tracking
calls. This additional cost has now been removed by absorbing the
constraint displacement into the existing motion track, so that the same
number of tracking steps are performed as before.
Partially resolves bug report https://bugs.openfoam.org/view.php?id=2688
Note: performs its own tracking and does not rely on the base
particle::trackXXX functions, and uses a local particle position.
Look to update to barycentric tracking in the future.
old "positions" file form
The change to barycentric-based tracking changed the contents of the
cloud "positions" file to a new format comprising the barycentric
co-ordinates and other cell position-based info. This broke
backwards compatibility, providing no option to restart old cases
(v1706 and earlier), and caused difficulties for dependent code, e.g.
for post-processing utilities that could only infer the contents only
after reading.
The barycentric position info is now written to a file called
"coordinates" with provision to restart old cases for which only the
"positions" file is available. Related utilities, e.g. for parallel
running and data conversion have been updated to be able to support both
file types.
To write the "positions" file by default, use set the following option
in the InfoSwitches section of the controlDict:
writeLagrangianPositions 1;
The splash kinetic energy has been changed to depend upon the velocity
of the parcel normal to the wall, rather than the absolute velocity, in
accordance with the original reference.
This patch was contributed by Stefan Hildenbrand at Pfinder
Resolves bug report https://bugs.openfoam.org/view.php?id=2682
Interpolated continuous phase data is only needed during a track and
therefore shouldn't be stored on the parcel. The continuous velocity,
density and viscosity have been moved from the kinematic parcel to the
kinematic parcel tracking data. This reduces the memory usage of the
kinematic layer by about one third. The thermo and reacting layers still
require the same treatment.
A lot of methods were taking argument data which could be referenced or
generated from the parcel class at little or no additional cost. This
was confusing and generated the possibility of inconsistent data states.
Tracking data classes are no longer templated on the derived cloud type.
The advantage of this is that they can now be passed to sub models. This
should allow continuous phase data to be removed from the parcel
classes. The disadvantage is that every function which once took a
templated TrackData argument now needs an additional TrackCloudType
argument in order to perform the necessary down-casting.
The combined solver includes the most advanced and general functionality from
each solver including:
Continuous phase
Lagrangian multiphase parcels
Optional film
Continuous and Lagrangian phase reactions
Radiation
Strong buoyancy force support by solving for p_rgh
The reactingParcelFoam and reactingParcelFilmFoam tutorials have been combined
and updated.
