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

Job opportunity for new postdoctoral position in PARDEM ITN Project for DEM particle scale modelling research.
Open to ALL nationalities but EU mobility rules apply (broadly speaking: must not be in the UK for more than 12 months in the last 3 years). The research experience of the candidate may not exceed 5 years at the time of the appointment. Apply via:

http://www.jobs.ed.ac.uk/vacancies/index.cfm?fuseaction=vacancies.detail...

Closing date: 12 December 2011

Posted on behalf of:
Jin Y. Ooi

There is now a user-contributed LIGGGHTS dump file reader plugin that can be found here.
Thanks to Christian Richter (OVGU) for sharing it.

UPGRADE recommended!
+ new Schiller Naumann drag law - thx to rq for the contribution!
+ new Mei-lift model- thx to rq for the contribution!
+ new version of big particle voidfraction model applying a Gauss distribution: GaussVoidFraction - thx to rq for the contribution!
+ new functionality to allow adding forces only to DEM integration (not to momentum exchange terms)
+ units of Ksl changed again (hopefully for good) to kg/(m3*s), in the solver Ksl is divided by rho (feedback if rho!=0 bug is fixed now is highly appreciated!)
+ bugfixes

LIGGGHTS packages are now available for Ubuntu and Debian. See instructions here.

Many thanks to Anton Gladky (TU Freiberg) for setting up this capability!

LIGGGHTS 1.4.6 (released 21 October 2011)

+ Extended the neighborlist build criterion to include variable particle radii as trigger for neigh list re-build
+ Added a warning to fix insert/stream if insertion area extends outside the simulation domain so that atoms might be lost during insertion. Thanks to Alice Hager (JKU) for providing a test script.
+ Fixed a rare bug in internal fix handling. Thanks to Mark Bentley (Space Research Institute, Austrian Academy of Sciences) for posting an offending input script.

LIGGGHTS 1.4.5 (released 12 October 2011)

+ Improved the fix heat/gran command to account for correction of the contact area by providing an original (unsoftened) value for the Young's modulus.
+ Added the possibility in fix wall/gran to store the per-particle wall force. Also fixed a small bug in arg error check for fix wall/gran. Thanks to Shantanu Maheshwari for posting an offending script.
+ Improved the accuracy for restart of contact history for granular wall - restarts should be more exact now.

UPGRADE useful if incompressible flow is of interest or if using the resolved CFD-DEM models (Glowinsky TestCase).
+ Bug in ShirgaonkarIB drag law fixed (thx to Yansan and Alice)
+ modifications that allow a compilation for compressible solvers (set preComp. flag in cfdemCloud.H and use the options_comp file)
+ bugfixes

LIGGGHTS 1.4.4 (released 22 September 2011)

+ Changed the fix heat/gran implementation so that heat transfer between particles in the fix group and particles not in the fix group is included. Thanks to Mark Bentley (Space Research Institute, Austrian Academy of Sciences) for the suggestion
+ Fixed a bug in the FixPropertyGlobal routine discovered by Christine Bertsch (Züblin Stuttgart).

Topics related to developing with CFDEM and LIGGGHTS (such as discussion about implementation details, C++, MPI and debugging tools) can be discussed in these new boards:
forum/10
forum/11

Also, the 'general discussion' on CFD and DEM boards have been merged into one discussion board.

Christoph

LIGGGHTS 1.4.3 (released 9 September 2011)

+ Fixed an issue in the fix property/atom implementation revealed by a nightly testharness run