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OpenCFD release OpenFOAM version 2.0.0
Posted Wed June 29, 2011 @01:08PM
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News OpenCFD are pleased to announce the release of version 2.0.0 of their OpenFOAM® open source CFD toolbox.

Version 2.0.0 is a major new version containing significant developments.

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Notable developments include:

Surface film
A new surface film modelling library offers the capability to predict the complex behaviour of thin films with optional coupling to the bulk flow, both continuum and discrete (particle) phases,in parallel. The modelling can predict film flow and breakup, splashing on wetted areas, thermal effects such as cooling with films resulting from sprays.

Steady-state VoF
A local-time stepping approach has been developed to run simulations involving complex physics to steady-state, quickly and reliably. The method has been implemented within a few solvers in OpenFOAM including, notably, VoF interface-tracking. Initial results show remarkable convergence to steady-state.

Lagrangian modelling
An fully-parallelised implementation of discrete element modelling (DEM) has been introduced. The particle-tracking algorithm has been rewritten to overcome a requirement that all cells needed to be convex. The resulting algorithm is a little faster on simple hex meshes, and considerably faster on complex meshes with borderline-convex cells. Also, diesel spray capability, has been migrated to the new Lagrangian framework introduced in v1.6. Finally, the local-time stepping approach has been successfully used for steady particle-tracking.

Thermophysical modelling
Thermophysical modelling has been extended to include a view factor radiation model, thermal baffles and thermal porous zones. The libraries have been overhauled to make the syntax for specifying model coefficients in the thermophysicalProperties dictionary much easier to understand. A new thermodynamic package has been added for solids, liquids and gases.

A new development for fire-safety simulation is modelling of pyrolysis, the decomposition of material at elevated temperatures, that is a usually the first reaction in the burning of solids. For chemistry in general, a chemFoam solver has been created to perform validations of the stiff chemistry solver in OpenFOAM; validation cases are supplied.

Turbulence modelling
The new dynLagrangian LES turbulence model, a Lagrangian two equation eddy-viscosity model, has been implemented. Several refinements have been made to wall function modelling in OpenFOAM and a new wall function, nutUTabulatedWallFunction, has been implemented that uses tabulated data of u+ = u+ (y+).

There are several developments relating to post-processing including: new function objects to calculate streamlines, near wall fields, etc. and for controlling runs; new polyhedral cell support for ParaView and additional functionality for post-processing with EnSight.

Run-time control
There are several developments relating to run-time control including: compilation, loading and execution of C++ code at run-time with the #codeStream directive, codedFixedValue BC and coded function object; new residual/convergence control with the SIMPLE/PIMPLE solvers; descriptive help information invoked by the -help option; changes to the monitoring of modified files; and, improvements for parallel running.

The changes to meshing include the addition of feature edge handling in snappyHexMesh, syntax improvements to the blockMesh configuration file, and a new binary file format for meshes that reads and writes much faster than before.

There are other new solvers including adjointShapeOptimizationFoam, for optimisation against pressure loss using an adjoint formulation, and magneticFoam, a solver for the magnetic field generated by permanent magnets; other new libraries include libfileFormats, that has routines for reading/writing data in some third-party formats, libvtkPV3blockMesh, tools to display blockMesh geometries in VTK/Paraview, and more.

OpenFOAM v2.0.0 is produced by OpenCFD who are Henry Weller, Mattijs Janssens, Chris Greenshields, Andy Heather, Sergio Ferraris, Graham Macpherson and Jenya Collings with external contributions from Mark Olesen and Niklas Nordin.

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