CFDEM®coupling, LIGGGHTS® and ParScale - Announcements from the developers

LIGGGHTS 1.2.6 beta (released 18 February 2011)

+ Fixed a bug in the contact history. Many thanks to Jean-Francois Jerier (EPFL) for tracking that down.
+ Fixed a bug in the triangle neighbor list calculation.
+ Fixed a bug in the create_atoms single command. Thanks to Christoph Goniva (JKU) for running into that issue.

LIGGGHTS 1.2.5 beta (released 2 February 2011)
Fixed two restart issues:
+ One of them was discovered by Jean-Francois Jerier (EPFL), and happend for shrink-wrapped BCs were used together with neigh_modify_once yes
+ The other was discovered by Moritz Höfert, and prevented correct restart of heat transfer simulations
Both should be fixed now

LIGGGHTS 1.2.4 beta (released 1 February 2011)

+ Updated the new shear history formulation - now dissipation comes from either sliding or damping, not from both.
The way it was done in 1.2.3 beta produced unreasonable results, e.g. for the conveyor test case
+ Fixed a bug with deleting a mesh wall during the simulation - thanks to Diego Peinado (Intrame) for catching this.
+ Fixed a typo bug in the new contact history. Thanks to Jean Francois Jerier (EPFL) for finding this tricky issue.
+ Fixed a restart bug - thanks to Ram Chand for reporting this

On behalf of the CFDEM group

I wish you

*** merry christmas ***

and

*** a happy new year 2011 ***

Christoph

LIGGGHTS 1.2.3 beta (released 23 December 2010)

Introducing and update and a couple of fixes:
+ Added a triaxial compression example contributed by Tong Shan (Hong Kong University of Science & Technology).
+ Fixed a bug in the wear model, not correctly write out the data to VTK in parallel. Thanks to Alexander Polson (Mecalysis) for seeing this.
+ Fixed a bug related to simulation restart with granular walls. Thanks to Ram Chand
+ Fixed a fix rigid issue. Thanks to thanks to Thomas Wagner (TU Freiberg) and Colman-Patrick Carroll (BASF) for reporting this.

LIGGGHTS 1.2.2 beta (released 1 December 2010)

+ Fixed a bug related to simulation restart
+ Added git support for the 1.2 beta branch, via a new repositoty 'liggghtsdev'. For details please see git instruction in the download section

IMPORTANT NOTE: This version is explicity released in beta state.

LIGGGHTS 1.2.1 beta (released 29 November 2010)
New features are introduced in 1.2.1:

Added the following commands:

1) Compute coord/gran to compute coordination numbers for granular simulations

2) Compute pair/gran/local to compute pairwise properties for granular simulations such as interparticle contact forces and shear history (which can be output using with the dump local command)

IMPORTANT NOTE: This version is explicity released in beta state.

LIGGGHTS 1.2 beta (released 22. November 2010)
New features are introduced in 1.2:

1)Introduced some changes "under the hood" regarding the granular pair and wall styles.
Classes containing core functionality and modelsare now seperated, so the code should now be structured
in a way that allows easier implementation of modified contact laws

2) Changed the way how some fixes request other fixes that store data for them. The old way of doing this
would have sooner or later led to troubles. Many thanks to Steve Plimpton (main LAMMPS developer, Sandia NL)

LIGGGHTS 1.1.10 (released 8. November 2010)

Features added in 1.1.10:
1) Added a simple model for qualitative prediction of wear (a modified version of the Finnie model). See doc for fix mesh/gran/stressanalysis and the seperate finnie-wear.pdf for details. Thanks to Georg Aichinger (Siemens VAI) for motivating addition of add such a functionality
2) Added a "chute_wear" example to show this new functionality
3) Extended the fix adapt in order to be able to use more than one of them together in a simulation - thanks for user Xinze Lee for catching this

LIGGGHTS 1.1.9 (released 19 October 2010)

1) Added the possibility to include particle-wall heat conduction with constant wall temperatures. This is both possible for both generic and CAD walls, see fix wall/gran and fix mesh/gran for details. Also fixed an issue with the heat transfer model, where particle based heat sources/sinks could have been double counted under certain circumstances
2) George Marketos (Imperial College) sent some code to improve 2d simulations. Now, particle inertia in 2d simulations is calculated for a disk rather than for a sphere