Release 1.9.0

Documentation

• Compilation on Hawk (HPE Apollo @ HLRS)
• Installation guide for CentOS 7

Features

• Multi-species ESBGK modelling (see Section "4.9.2 Bhatnagar-Gross-Krook Collision Operator")
• Python script to create a cylindrical mesh with HOPR (in piclas/tools/createCylinderHOPR)

Fixes

• Removed "read*" occurrences from code

Release 1.8.0

With the introduction of the Variable Soft Sphere model in the current release, the input parameters of the collision model have changed:

! Old: Part-Species1-VHSReferenceTemp = 273
Part-Species1-Tref = 273 
! Old: Part-Species1-VHSReferenceDiam = 4E-10
Part-Species1-dref = 4E-10
! Old: Part-Species1-omegaVHS = 0.24
Part-Species1-omega = 0.24

The code will abort, when using the old parameters. More details can be found in Section "4.7.4 Species Definition" and "4.7.5 Pairing & Collision Modelling".

Features

• 1D Simulation (e.g. for shock-tube simulations, see Section "4.7.3 Symmetric Simulations")
• Variable Soft Sphere (VSS) collision model and support for collision and species-specific VHS/VSS parameters (see Section "4.7.5 Pairing & Collision Modelling")

Improvements

• Display the elapsed CPU time in std.out when ABORT is called

Fixes

• Bugfix in photo-ionization: third particle did not receive a velocity change
• Fixed evaluation of BGField in EvaluateFieldAtPhysPos and EvaluateFieldAtRefPos

Release 1.7.0

Features

• Modelling of photo-ionization processes by photon impact with a background gas and a surface

Improvements

• Improved reproducibility of simulation results by including the compile flags in the "userblock" as well as the git commit hash (next to the version number) in standard output
• Increased performance of the HDG solver:
  • Fixed the load balance weighting method
  • Restart without recomputing the HDG lambda solution

Fixes

• Bugfix in treatment of identical particles in the rotational 2D symmetry case with radial weighting

Release 1.6.4

Fixes

• Fixed compilation (make) and installation (make install) for shared libs for cmake versions <3.14

Release 1.6.3

Improvements

• Added calculation of field and particle ElemTime separately and added output to ElemTimeStatistics.csv
• Output error norms for HDG to FieldAnalyze.csv
• Updated tools for determining the electric current from PartStateBoundary files
• Extended tool for merging of state files (DSMCState, DSMCSurfState, PartStateBoundary, TimeAvg, etc.) for post-processing

Fixes

• Fixed the compilation under GCC 9/10 (new default in Ubuntu 20.04)
• Fixed compilation with fixed polynomial degree
• Missing load balance timer in background gas particle insertion
• Missing load balance timer in HDG
• Fixed installation target for the shared library

Release 1.6.2

Improvements

• Included electronic energy relaxation at the wall and added a regression test for energy accommodation at the wall

Fixes

• Fix of compilation with the Intel compiler and Intel MKL

Release 1.6.1

Features

• Output of lost particles during tracking and restart in a single file for debugging (see Section "5.1 Particle Data")

Improvements

• Clean-up and speed-up of nightly regression tests
• Refactoring of the DSMC main routine and particle pairing routines

Fixes

• Avoid overflows in exponential functions in DSMC chemistry

Release 1.6.0

Features

• Added new SEE-I model for Ar+ bombarding different types of metal
• Background gas: Extension to polyatomic molecules and gas mixtures
• Boris-Leapfrog time integration for PIC (Poisson)
• Delete specified products after a chemical reaction

Improvements

• Regression tests for MCC and background gas routines
• h5piclas2vtk: Automatic output of DG_Source if it is available

Fixes

• Fix of inner boundaries in combination with an open boundary
• Fix in h5piclas2vtk for VisuParticles=T
• Fix particle time integration analytical initial conditions
• Fix in the nearest neighbour search in DSMC

Release 1.5.2

Documentation

• Added troubleshooting for access to Gitlab with port-forwarding

Features

• Implemented diatomic species with the cubic Fokker-Planck method

Improvements

• Added a "Time remaining" status line as console output (enabled by "doPrintStatusLine=T")

Fixes

• Fixed a bug in the FinalizeDSMC routine
• Fixed a bug in the h5piclas2vtk converter tool

Release 1.5.1

Documentation

• Updated release and deploy developer guide section

Fixes

• Fixed crucial quadtree bug in 2D BGK