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  1. Sep 09, 2017
  3. Jul 14, 2017
  5. Sep 12, 2017
    • Will Bainbridge's avatar
      lagrangian: Optimised reduced-dimension constraints · d7ff97f4
      Will Bainbridge authored and Andrew Heather's avatar Andrew Heather committed 
      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
      d7ff97f4
  7. Sep 14, 2017
  9. Jul 31, 2017
  11. Sep 14, 2017
  13. Sep 13, 2017
    • Andrew Heather's avatar
      ENH: Lagrangian - provided backwards compatibility for cases using the · 2defba00
      Andrew Heather authored 
      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;
      2defba00
  15. Aug 07, 2017
  17. Aug 29, 2017
  19. Sep 04, 2017
  21. Sep 05, 2017
  23. Aug 29, 2017
  25. Sep 08, 2017
  27. Aug 29, 2017
    • Will Bainbridge's avatar
      KinematicParcel: Removed continuous phase data · 402b8637
      Will Bainbridge authored and Andrew Heather's avatar Andrew Heather committed 
      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.
      402b8637
  29. Aug 24, 2017
  31. Aug 23, 2017
  33. Sep 08, 2017
  35. Aug 23, 2017
  37. Aug 22, 2017
  39. Sep 08, 2017
  41. Aug 22, 2017
    • Will Bainbridge's avatar
      lagrangian: Un-templated the tracking data · 87c15bf1
      Will Bainbridge authored and Andrew Heather's avatar Andrew Heather committed 
      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.
      87c15bf1
  43. Jul 14, 2017
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  55. Sep 08, 2017
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  59. Jul 10, 2017
  61. Jun 27, 2017
  63. Jun 26, 2017
  65. Sep 08, 2017
  67. Jun 22, 2017
  69. Jul 24, 2017