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236 lines
9.9 KiB
Org Mode
236 lines
9.9 KiB
Org Mode
# -*- mode: org; -*-
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#
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#+TITLE: *OpenFOAM release notes for version 1.6*
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#+AUTHOR: OpenCFD Ltd.
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#+DATE: July 2009
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#+LINK: http://www.opencfd.co.uk
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#+OPTIONS: author:nil ^:{}
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* Overview
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OpenFOAM-1.6 is is a significant upgrade to version 1.5 in ways which are
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outlined below. This release passes all our standard tests and the tutorials
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have been broadly checked. If there are any bugs, please report them using
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the instructions set out in: http://www.OpenFOAM.org/bugs.html.
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* GNU/Linux version
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The 32bit and 64bit binary packs of the OpenFOAM release were compiled on a
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machine running SuSE GNU/Linux version 11.1 and also tested on Ubuntu 9. We
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recommend that users run OpenFOAM on one of these or a similar recent version
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of GNU/Linux. This release has also been successfully compiled and tested on
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older GNU/Linux releases but this requires the installation of Qt 4.3.? (the
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sources for which are supplied with OpenFOAM-1.6, see README) for ParaView-3
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to run.
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* C++ Compiler version
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+ Release compiled with GCC 4.3.3.
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+ Built in support for the Intel C++ 10.? compiler (untested).
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+ The choice of the compiler is controlled by the setting of the
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~$WM_COMPILER~ and ~$WM_COMPILER_ARCH~ environment variables in the
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/OpenFOAM-1.6/etc/bashrc/ (or /cshrc/) file.
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+ The location of the installation of the compiler is controlled by the
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~$compilerInstall~ environment variable in the
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/OpenFOAM-1.6/etc/settings.sh/ (or /settings.csh/) file.
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* Library developments
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*** Turbulence modelling
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+ Major development of turbulence model libraries to give extra flexibility
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at the solver level. For solvers that can support either RAS/LES
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computations, the selection is made in the
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/constant/turbulenceProperties/,
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by setting the =simulationType= keyword to:
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- =laminar=
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- =RASModel=
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- =LESModel=
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+ Depending on the selection, the model is the instantiated from /constant//
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- /RASProperties/
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- /LESProperties/
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***** RAS wall functions
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Wall functions are now run-time selectable per patch for RAS.
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******* Velocity:
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+ Apply to turbulent viscosities =nut= or =mut=
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+ Apply to =k=, =Q=, =R=
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+ Apply to =epsilon=, =omega=
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******* Temperature:
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+ Apply to turbulent thermal diffusivity, =alphat= (compressible only)
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******* To apply wall functions:
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+ To recapture the functionality of previous OpenFOAM versions (v1.5 and
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earlier) assign:
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- for velocity:
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- =nut=: =nutWallFunction=
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- =mut=: =muWallFunction=
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- =epsilon=: =epsilonWallFunction=
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- =omega=: =omegaWallFunction=
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- =k=, =Q=, =R=: =kQRWallFunction=
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- for temperature:
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- =alphat=: =alphatWallFunction=
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+ New =alphaSgsJayatillekeWallFunction= thermal wall function for
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compressible LES
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***** *New* LES turbulence models
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+ Spalart-Allmaras DDES
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+ Spalart-Allmaras IDDES
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***** Upgrading:
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+ *New* utility - =applyWallFunctionBoundaryConditions=
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+ Solvers will automatically update existing cases
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- New fields created based on the presence of the =nut/mut= field
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- Boundary conditions include scoping, i.e compressibility:: for
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compressible solvers
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- Modified fields will be backed-up to /<field>.old/
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+ NOTE:
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- Fields are only updated for those fields associated with the current
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turbulence model selection, i.e. if fields exist for use with other
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models, they will not be updated
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- New specification is not backwards compatible
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*** Thermo-physical Models
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+ Old compressibility based thermo package renamed
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=basicThermo= \rightarrow =basicPsiThermo=
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+ *New* =basicRhoThermo= thermo package
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- Additional density field stored
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- General form - can be used for other types of media, e.g. liquids
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- Additional polynomial-based thermodynamics
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- Equation of state: =icoPolynomial=
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- Transport: =polynomialTransport=
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- Thermo: =hPolynomialThermo=
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+ Removed earlier hard-coding of gas thermophysics for chemistry modelling:
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- =reactingMixture= now templated on thermo package
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- =chemistryModel= now templated on thermo package
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- =chemistrySolver= now templated on thermo package
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+ *New* =fvDOM= radition model
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- finite volume, discrete ordinates method
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+ *New* (reinstated) =eThermo= thermodynamics package
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- internal energy based thermodynamics
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*** Lagrangian
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***** Intermediate
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- Overhaul of the underlying framework
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- Reacting now split into reacting and reacting multiphase
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- New structure for variable composition
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- Many new sub-models, including:
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- Injection
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- =PatchInjection= - injection local to patch face cells
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- =FieldActivatedInjection= - injection based on satisfying external
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criterion
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- LookupTableInjection - explicity define injection locations and all
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parcel properties
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- Post-processing
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- patch post-processing - collect data for parcels impacting user
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defined patches
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- Patch interaction
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- generalised behaviour for parcel interaction with patch
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- Phase change
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- liquid evaporation
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***** Coal combustion
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- *New* library - extension of reacting-multiphase functionality
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- Surface reaction/combustion models
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*** Discrete methods
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- *New* library offering DSMC simulation functionality - see =dsmcFoam=
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below
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- *New* libraries offering molecular dynamics simulation functionality - see
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=mdFoam= and =mdEquilibrationFoam=: below.
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* Solver restructuring
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The upgrade to the turbulence models means that the simulation type, i.e.
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laminar, RAS or LES can be selected at run time. This has allowed a reduction
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in the number of solvers, simplifying the overall code structure
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+ Solvers which support laminar, RAS and LES:
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- =turbFoam=, =oodles= \rightarrow =pisoFoam=
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- =turbDyMFoam= \rightarrow =pimpleDyMFoam=
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- =rhoTurbFoam=, =coodles= \rightarrow =rhoPisoFoam=
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- =xoodles= \rightarrow absorbed into =XiFoam=
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- =buoyantFoam=, =lesBuoyantFoam= \rightarrow =buoyantPisoFoam=
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- =interFoam=, rasInterFoam, =lesInterFoam= \rightarrow =interFoam=
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- =lesCavitatingFoam=, =rasCavitatingFoam= \rightarrow =cavitatingFoam=
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+ Solvers which support LES only:
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- =channelOodles= \rightarrow =channelFoam= (LES)
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* General changes
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- pd to p ------------------------------------------------------------ [HENRY]
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- gravity ------------------------------------------------------------ [HENRY]
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* Tutorial restructuring
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to reflect solver application structure
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* Post-processing ---------------------------------------------------- [MATTIJS]
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- SAMPLING - improved plane, iso-surface handling
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* *New* Solvers
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+ =buoyantBoussinesqSimpleFoam=
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Steady state heat transfer solver using a Boussinesq approximation for
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buoyancy, with laminar, RAS or LES turbulence modelling
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+ =buoyantBoussinesqPisoFoam=
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Transient heat transfer solver using a Boussinesq approximation for
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buoyancy, with laminar, RAS or LES turbulence modelling
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+ =coalChemistryFoam=
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Transient, reacting lagrangian solver, employing a coal cloud and a thermo
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cloud, with chemistry, and laminar, RAS or LES turbulence modelling
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+ =porousExplicitSourceReactingParcelFoam=
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Transient, reacting lagrangian solver, employing a single phase reacting
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cloud, with porous media, explicit mass sources, and laminar, RAS or LES
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turbulence modelling
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+ =rhoReactingFoam=
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Density-based thermodynamics variant of the reactingFoam solver, i.e. now
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applicable to liquid systems
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+ =dsmcFoam=
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DSMC (Direct Simulation Monte-Carlo) solver for rarefied gas dynamics
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simultions, able to simulate mixtures of an arbitrary number of gas species.
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The variable hard sphere collision model with Larsen-Borgnakke internal
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energy redistribution (see "Molecular Gas Dynamics and the Direct Simulation
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of Gas Flows" G.A. Bird, 1994) is available; other run-time selectable
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collision models can be easily added.
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* Updated solvers
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+ =mdFoam=
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Molecular Dynamics (MD) solver able to simulate a mixture of an arbitrary
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number of mono-atomic and small, rigid polyatomic (i.e. H2O, N2) molecular
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species, with 6 degree of freedom motion, in complex geometries. A molecule
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of any species can be built by specifying its sites of mass and charge. All
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molecules interact with short-range dispersion forces and pairwise
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electrostatic interactions using methods described in:
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Fennell and Gezelter, J. Chem. Phys. 124, 234104 (2006)
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+ =mdEquilibrationFoam=
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Similar to mdFoam, but employs velocity scaling to adjust the simulation
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temperature to a target value. Useful to equilibrate a case before
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simulation.
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* Function objects
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*** *New* function objects:
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- =systemCall= - executes a list of system instructions
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- =fieldMinMax= - computes the min/max of a <field>
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- =staticPressure= - converts kinematic pressure to static pressure
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- =dsmcFields= - calculates intensive fields (velocity and temperature) from
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averaged extensive fields (i.e. momentum and energy)
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*** Usage
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- Improved output control: =timeStep= or =outputTime=
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* Boundary conditions
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- Improved set of direct mapped boundary conditions
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- Buoyancy boundary condition ---------------------------------------- [HENRY]
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* *New* utilities
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- =particleTracks= - generate particle tracks for lagrangian calculations
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- =dsmcInitialise= - preprocessing utility to create initial configurations of
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DSMC particles in a geometry
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*** *New* foamCalc functions
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- =interpolate= - performs fvc::interpolate(<field>)
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- =randomise= - randomises a <field> by a given perturbation
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- =addSubtract= - simple add/subtract field functionality
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