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► Forum News - Improved breadcrumbs, new OpenFOAM forums
  23 Jan, 2018
As you might have noticed we have improved the breadcrumb links available just under the top drop-down menu when you are visiting a forum. The breadcrumb now includes links to all preceding forums. This should hopefully make it easier to navigate up in the sub-forum tree.

We have also recently launched a new OpenFOAM forum for Community Contributions, you can find it here:

This forum is intended for discussions about open source extensions to OpenFOAM coming from the community. Each extension also has a Prefix and it is possible to filter the forum to only see threads about one extension/prefix. If you are missing an extension/prefix please send an email to or reply to this thread.

Our intention is also to under this Community Contribution forum add additional sub-forums for specific development groups. So far we have only added one development group.
► Spam filter problems - Forbidden, You Don't have permission to access ...
    9 Dec, 2017
We have for some time now been running quite restrictive spam filers on our servers. This has reduced our spam problems significantly. However, our spam filters also sometimes give normal users problems. Two things can happen if you are blocked by our spam filters:

1. You will be completely locked out and you will not be able to access any page on for a certain period

2. You will when you try to do something on CFD Online get an error message saying something like:



You don't have permission to access ....
If you are having problems with our filters please contact us directly via email to Describe what problem you have and what you were doing when the problem occured. Please also tell us your IP number, which you can look up on for example
► Updated Forum Apps for Android and iOS / iPhone / iPad
  18 Oct, 2017
We have now updated both of our forum apps. The new version of the app is a major release based on a new code-base, with many improvements and hopefully a better user interface. It should be both faster and more bug-free.

The Android version can be found on Google Play here:

The iOS / iPhone / iPad version can be found on Apple App Store here:

As always the Forum app is free to everyone.

One thing that we have changed is that this app now no more by default includes a special app-footer when you post a message from within the app. This footer irritated some users and it fills no real purpose. I don't think that I liked it myself either. I want to decide myself if I have a footer in my posts and what I write in it.
► CFD Online Privacy Policy
  12 Sep, 2017
Please find CFD Online's Privacy Policy here:

This privacy policy was created since we received a request by Google to clearly specify CFD Online's user data policy in a privacy statement.
► Intrusion in the CFD Online Forums
  26 Aug, 2017
We have discovered that someone has been able to compromise the forums on CFD Online. Our forum user-database was most likely stolen and this database contained encrypted forum passwords (the stored passwords were both hashed and salted before stored, but the random salt was also available in the user-database). The hash algorithm used is fairly reliable, and was used twice with the random salt, but there has been reports of possible weaknesses, so someone might be able to decrypt the passwords. Hence, we ask everyone to please change your passwords.

All registered users should have received an email asking you to please change your password in the forums. If you remember your password you can do this in the User Panel > Edit Email and Password section here: If you have forgotten your password you can request a new one to be set and emailed to you at

In addition to the stolen user-database the intruder was also able to install his own Google AdSense advertisements in the forum threads. These ads were quite annoying and were not visible for administrators or moderators, so it took some time for us to discover them. This also happened in the middle of our vacation time. These annoying ads were available from July 28 until August 21.

If you have any questions or comments about this please do not hesitate to contact us at

We are very sorry about this incident and would like to sincerely apologize to all of our fantastic users.
► Hotmail/Outlook/Live Email Problems
  12 Jul, 2017
We have for several years had problems with email accounts at Hotmail/Outlook/Live (all run by Microsoft). Emails sent to these systems have sometimes been automatically deleted by Microsoft. We had a way to avoid this by registering as a safe sender, but this has not worked lately. This has caused big problems for users who try to register on the Forums, since to activate your forum account you must click on a link in an email sent to you when registering. If Microsoft has deleted this email there is no way to activate your forum account.

We have been in contact with Microsoft and they should now be accepting our emails again. However, the emails might end up in your spam folder. If you find that our emails are put in your junk folder then please make sure that you mark them as "not junk" to help keep Microsoft's spam rating correct. If you have tried to register but have not received the activation email you can ask for a new to be sent here:

This problem is caused by lazy CFD Online users who are subscribed to forum threads etc. and instead of unsubscribing from the threads they do not want any notifications from they mark our emails as spam. If enough people do this Microsoft will eventually decide that all emails are spam. This will make Hotmail/Outlook/Live accounts useless for CFD Online users (forum users can't register, registered users can't ask for password resets, subscriptions are not working, ...)


► NAFEMS World Congress 2019 | Quebec City, Canada | 17-20 June 2019
  22 Feb, 2018
NAFEMS are delighted to announce that our 17th World Congress will take place in Quebec City, Canada, 17-20 June 2019.This is the 2nd time that the World Congress will take place in Canada, with the 2
► Remembering Dr Richard MacNeal
    7 Feb, 2018
Remembering Dr Richard MacNealCo-founder of MSC Software and MSC Nastran passes away at the age of 94It is with great sadness that we at NAFEMS learned of the recent passing of one of the pioneers of
► NAFEMS International Journal of CFD Case Studies: Call for Contributions
    1 Feb, 2018
NAFEMS International Journal of CFD Case Studies: Call for ContributionsSubmissions are invited for publication in the next edition of the NAFEMS International Journal of CFD Case Studies.The purpose
► What is the FMI? by the NAFEMS Systems Modelling & Simulation Working Group
  15 Jan, 2018
What is the FMI? by the NAFEMS Systems Modelling & Simulation Working Group
► Invitations to Tender: Equilibrium FEA, Manufacturing Process Optimization, & Industrial Usage
    2 Nov, 2017
Invitations to TenderCase Studies Demonstrating Industrial Usage of Engineering Analysis & SimulationAn Introduction to Manufacturing Process OptimisationWhy do Equilibrium Finite Element Analysis
► NAFEMS Iberia Seminar: CFD – Flow Simulation in Engineering
  26 Oct, 2017
NAFEMS Iberia Seminar:CFD – Flow Simulation in EngineeringCall for presentations NAFEMS Seminar 22 February 2018 in MadridComplex flows are commonplace in engineering systems and the temptation

OpenFOAM ESI-OpenCFD top

► Training schedule for 2018
  19 Jan, 2018
Comprehensive Public Training Schedule for 2018 is now available. Please see our Website

Regular classroom Foundation and Advanced trainings:
  • 19-22 Feb - Milan, Italy
  • 16-19 April - Madrid,Spain
  • 14-17 May - Frankfurt, Germany
  • 18-21 Jun - Paris, France

Live virtual trainings (with a live trainer):

OpenFOAM® Training OpenCFD deliver OpenFOAM Foundation and Advanced training courses. Each course is of 2 days duration and is delivered by OpenCFD staff with exceptional experience in OpenFOAM.

VisualCFD is a 1 day course run at European Locations. Training Locations worldwide, we also provide on-site why not contact us for a proposal today.
► OpenFOAM-v1712 released
  19 Jan, 2018
OpenCFD is pleased to announce release of OpenFOAM-v1712. This release extends OpenFOAM-v1706 features across many areas of the code. The new functionality represents development sponsored by OpenCFDs customers, internally funded developments, and integration of features and changes from the OpenFOAM community.

Among other developments it features:
- Update of the Overset mesh
- New Arrhenius viscosity transport model
- New energy transport for non-thermal solvers
- New turbulence decay control
- New blended turbulence viscosity wall function
- New interface to the kaHIP decomposition library
- Improved parallel processing

Among the community contributions:
- New integration of finite area method from the foam-extend project by Hrvoje Jasak
- New avalanche modelling of Matthias Rauter
- New types of VOF waves

... and many other features

The detailed list can be found at:

OpenFOAM-v1712 can be downloaded as source code, precompiled Docker images for Linux, Windows and Mac operating systems from or is available also in the spack HPC package manager via the 'openfoam-com' package.
► OpenFOAM-v1706+ released
    2 Jul, 2017
OpenCFD is pleased to announce the June 2017 release of OpenFOAM-v1706. This release extends OpenFOAM-v1612+ features across many areas of the code. The new functionality represents development sponsored by OpenCFDs customers, internally funded developments, and integration of features and changes from the OpenFOAM community.

Among other developments it features:
  • Overset mesh
  • New iso-surface-based interface capturing functionality
  • Improved second order restart
  • New lumped point Fluid Structure Interaction (FSI)
  • New fvOption to simulate Joule Heating
  • New wave generation models
  • Upgraded command-line bash completion
  • Improvements to the wmake tool

The detailed list can be found at

OpenFOAM-v1706 can be downloaded as source code, precompiled Docker images for Linux, Windows and Mac operating systems from

OpenCFD invites all users to join a free online release webinar. Please register here:
► Updated native OpenFOAM reader for ParaView 5.3
  17 Mar, 2017
ESI-OpenCFD has been continuing its work on improving post-processing.

Working together with Kitware, the VTK-native OpenFOAM reader in the freshly released ParaView 5.3.0 now includes full support of 32-bit and 64-bit binary formats, better coverage of the Lagrangian formats, and the option to skip the initial conditions directory. This release also includes essential improvements for parsing STL ASCII files. (

At the same time, the OpenFOAM plugins for ParaView have been updated in our development line (for the upcoming 1706 release in June) to work with all recent ParaView versions. The blockMesh reader now also includes support for displaying the patch names, which allows better visualization of a blockMesh. (

Note that the ParaView plugins supplied with OpenFOAM are now versioned according to the ParaView major version, which makes it possible to easily switch between different ParaView versions without conflicts.

OpenFOAM Foundation top

► OpenFOAM 5.0 Released
  26 Jul, 2017
The OpenFOAM Foundation is pleased to announce the release of version 5.0 of the OpenFOAM open source CFD toolbox. Version 5.0 is a snapshot of the OpenFOAM development version that is “always-releasable” quality, through rapid-turnaround feedback between code maintainers and users. It provides new functionality and major improvements to existing code, with strict demands on usability, reliability and maintainability. It is produced for the benefit of all users, rather than a handful of commercial organisations.

Version 5.0 is a new major version release in which some backward compatibility to OpenFOAM version 4 is not maintained (requiring some changes to case input files), containing 816 code commits since version 4.0. OpenFOAM 5.0 uses all features of the ISO/IEC 14882:2011 (C++11) standard, and has been tested with C++ compilers that conform to that standard, such as GCC v4.8+, Clang v3.7+ and Intel ICC v17.0.4+.
OpenFOAM 5.0 is distributed under the General Public Licence by the OpenFOAM Foundation for:
Multiphase for Marine/Offshore Engineering
  • Wave Modelling: implemented boundary conditions for applying waves at an inlet that meets standards of code quality, maintainability and licensing
  • Wave Initialisation: new setWaves utility for initialising waves
  • Wave Damping: new verticalDamping fvOption damps the vertical motions of an interface in the region approaching an outlet to avoid reflections
  • Data Processing: a interfaceHeight function object reports height of a phase interface from a set of locations
  • Hull: new interfaceCompression boundary condition improves cases where a fluid interface hits a surface at shallow angle
Further Information: “Water Waves in OpenFOAM”.

General Multiphase
  • Performance/Numerics: increased robustness of multiphase solvers through improved inflow/outflow boundary conditions; better restart and more efficient Crank-Nicolson implementation for interFoam family of solvers; introduced a limiter to stabilise the interfacial pressure work term in the energy equation for multiphase flows; improved mass conservation in compressibleInterFoam using continuity error correction; improved calculation of MULES limiter at walls; for setWaves, generalised tetrahedron and triangle cutting, enabling cutting with level-sets as well as planes; added functions for volume averaging of discontinuous fields
  • Surface Tension Modelling: new framework for runtime-selectable surface tension models in the interfaceProperties library; convenient handling of temperature-dependent surface tension through liquidProperties class; new temperatureDependentContactAngleForce model added to surface film functionality
  • Film Modelling: new experimental compressibleInterFilmFoam multiphase solver supporting transfer between volume of fluid interface capturing and film approximation
Transport and Turbulence Modelling
  • Viscosity Modelling: new general strainRateFunction, non-Newtonian viscosity model where users can select the function at run-time using the Function1 functions, such as table, csvFile, polynomial, etc.; new Casson model for blood rheology, see User Guide 7.3
  • Laminar Stress Models: new generalised framework for laminar stress models including linear, non-linear, viscoelastic, etc.; new framework for viscoelastic modelling including Maxwell and Oldroyd-B models
  • Turbulence Models: Reynolds Stress turbulence supported in VoF and other incompressible multiphase solvers; corrected k-omega SST Sato model; corrected C3 dilatation term in turbulence modelling for compressible flows; improved low-Reynolds number behavior in omegaWallFunction and epsilonWallFunction
Particles and Tracking
  • Tracking: completely replaced the existing tracking, which failed for meshes whose decomposition into tetrahedra (tets) include “negative” tets; the replacement, known as barycentric tracking, is reliable on any mesh, irrespective of tet quality; optimised the averaging methods in MPPIC using particle barycentric coordinates for 2x speed up; changed interpolation for particles to use the barycentric coordinates, making it much faster and more reliable
  • Particle Injection: created the massRosinRammler distribution to handle varying number of particles per parcel for fixed-mass parcels
  • Optimisation: added solveFlow switch to freeze the flow field, but keep the particles running, in sprayFoam
Further Information: “OpenFOAM Barycentric Tracking”.

  • TDAC/ISAT: new TDACChemistryModel chemistry model providing Tabulation of Dynamic Adaptive Chemistry (TDAC); new Eddy Dissipation Concept (EDC) turbulent combustion model, including support for TDAC/ISAT for efficient chemistry; added variable time-step and local time stepping (LTS) in ISAT for TDAC chemistry
  • Other: new limiting of local time step (for solving steady-state) to specie reaction rate in reactingFoam; support for isothermal, compressible flow in reactingEulerFoam; reactions can optionally be enabled only in a specified list of cellZones.
  • snappyHexMesh: improved input syntax for triSurfaceMesh files; stopped writing of redundant files that break other applications and waste disk space
  • blockMesh: new point/edge projection onto geometric surfaces, see User Guide 5.3.3; new sloshingCylinder tutorial, demonstrating projection to create a cylindrical background mesh; added block face orientation checks to aid debugging; updated blockMeshDict files to use multi-grading in the pitzDaily tutorials, see User Guide
  • refineMesh: corrected parallel operation
  • Mesh Motion: new template cylindrical background mesh significantly improves robustness and accuracy of rotating geometry simulations; added mesh-motion solver for multiple moving regions, e.g. for 2 counter-rotating AMI regions; added dynamic mesh versions of DPMDyMFoam and MPPICDyMFoam solvers; improved 2nd-order time discretisation schemes for moving meshes; improved stability by bounding the localEuler time scheme for steady-state cases with mesh-motion
Energy, Heat Transfer and Thermophysical Modelling
  • Liquid Thermophysical Modelling: rewritten thermophysical modelling to make solid/liquidProperties and specie classes compatible; simplified and generalized the user interface for liquid properties; added general fluidThermo model to enable run-time selection of thermophysical model type; added equation of state for the Boussinesq approximation for buoyant flows, see User Guide 7.1.5
  • Compressible solvers: made rhoSimpleFoam (steady flow) work with any thermophysical model including liquids and more stable; added support for transonic flow of liquids and real gases in rhoPimpleFoam and improved stability and convergence
  • Other: combined functionality and improved usability of externalWallHeatFluxTemperature boundary condition and changed ambient temperature (Ta) to support time variation; added radiation modelling fvOption that can be used in any simulation where energy is solved; added support for residual convergence controls to chtMultiRegionFoam
Parallel I/O
  • new collated file format introduced in which the data for each decomposed field (and mesh) is collated into a single file that is written (and read) on the master processor
  • new masterUncollated option writes data with the original uncollated format without NFS
  • file writing can be threaded allowing the simulation to continue running while the data is being written to file: see “Threading Support”
Further Information: “OpenFOAM Parallel I/O”

Productivity and Usability
  • Data Visualisation: updated the native OpenFOAM reader module for ParaView version 5.4.0; maintenance of the native reader module ensures continued trouble-free visualisation of OpenFOAM data.
  • Command Line Interface: added Bash [TAB] completion to all OpenFOAM applications and scripts; added -list... options, e.g. -listScalarBCs in solvers for more relevant listing of BCs, fvOptions, turbulence models, etc (as a replacement to foamList), see User Guide 5.2.3; enabled applications running with the -doc option, e.g. paraFoam -doc, to open the application documentation at
  • Case Management: foamCloneCase can now clone cases from configuration directories, and copy script files and 0.orig directories; major maintenance of scripts, improving -help option and POSIX compliance
  • Inlet and outlet: generalised the swirlInletVelocity boundary condition to reads individual velocity components as Function1; new matchedFlowRateOutletVelocity boundary condition which matches the flow rate at outlet to a corresponding inlet
  • User Input: input syntax for fvOptions has been made much more user-friendly; made ...Coeffs sub-dictionaries optional for input model parameters; standardised notation in input parameters in radiation boundary conditions
  • Parallel Computation: added -copyZero option to decomposePar to copy the 0 directory to processor directories, to avoid field/mesh inconsistencies, especially when generating the mesh in parallel; integrated much faster, scalable reconstructParMesh
  • Configured Function Objects: add and subtract fields; XiReactionRate to write reaction-rate fields for the Xi-based combustion models; dsmcFields to write DSM fields; flowRateFaceZone to calculate flow rate through a face zone; streamFunction to calculate stream function; wallHeatFlux to calculate wall heat flux; writeCellVolumes to write out cell volume data and writeCellCentres to write out cell centre data, see User Guide 6.2
  • Function1: added a range of generic ramp functions, including linear, quadratic, halfCosine, quarterCosine and quaterSine functions which can be superimposed onto any other function using scale, see User Guide; damper function for smoother start-up under an applied impulse in rigidBodyMeshMotion
  • “Limiting” fvOptions: limitVelocity to limit the maximum velocity, e.g. to avoid excessive unphysical velocities generated during slamming event; made settings and documentation consistent in limitTemperature

OpenFOAM v5.0 was produced by:
  • Architect/Lead: Henry Weller
  • Management: Henry Weller, Chris Greenshields
  • Maintenance/Testing/Contributions: Henry Weller, Chris Greenshields, Will Bainbridge, Mattijs Janssens, Bruno Santos.
  • Other Contributions:
    • Combustion: Francesco Contino (+ macOS), Zhiyi Li, Alessandro Parente
    • Reacting Multiphase: Juho Peltola, Alberto Passalacqua, Ronald Oertel
    • Lagrangian: Timo Niemi (+ function objects), Karl Meredith
    • Parallel Running: Paul Edwards, Kevin Nordin-Bates, Alexey Matveichev
    • Heat transfer: Stephan Goeke, Tobias Holtzmann
Thanks to the OpenFOAM enthusiasts who have contributed to a better code through the Issue Tracking System.

To download OpenFOAM 5.0, click here.

OpenFOAM Other Sources top

► CFD with OpenFOAM online training, training provided by Technical Courses 2018
  24 Feb, 2018
CFD with OpenFOAM course (update contents), 50 hours online, 9th March 2017, price is 400€.

Students will require approximately 50 hours to acquire a intermediate OpenFOAM level and obtain a certificate diploma. Nevertheless, additional material is provided for students who want to spend more than 50 hours and acquire a higher level.

The course is structured as follows:
- 11 theoretical chapters (each chapter includes a text and a videolesson)
- 8 basic exercises (each exercise includes a text and a videotutorial)
- 7 intermediate exercises (each exercise includes a text and a videotutorial).

The whole material (videolessons, exercises and texts) is available from the first day and there is no schedule. Videolessons are recorded. This enables each student to progress according to his learning pace.

More information & registration under:
► SOWE Conference - Visby, Sweden, June 2018
  23 Feb, 2018
Dear OpenFOAM user,

The sixth symposium on OpenFOAM® in Wind Energy (SOWE) will be hosted by the Wind Energy Group of the Earth Sciences Department at Uppsala University Campus Gotland, bringing together people who use OpenFOAM® for wind energy applications. The symposium aims to present the state of the art in wind energy computations using OpenFOAM®, allowing participants (experts, beginners, developers, etc.) to discuss research results, techniques and to identify common problems in the wind energy sector.

For more information (important dates, registration, accommodation, etc.) please visit the conference website at

Dates and venue
June 13 - 15, 2018.

The symposium will cover a wide variety of areas linked to wind energy research. Most relevant subjects are listed below and the presentations will be arranged by topic. The proposed topics are not exclusive and are not intended to limit participation in the discussion of other wind energy applications of OpenFOAM®.
  • Atmospheric flows (including flow over complex terrain and sea)
  • On and offshore HAWT & VAWT wind turbine aerodynamics and wakes
  • Small scale wind energy applications
  • Site assessment and wind farm aerodynamics
  • Other, such as meshing, algorithms, post-processing, parallel performance, etc.

Article format
A 5 page article will be submitted, with previous approval of an abstract. The accepted articles will be made available on a conference page after the conference under a Creative Commons Attribution License.

New deadline for abstract submission: March 1st.

An oral presentation of the accepted articles will be granted.

Please join us!

The organizers,

Stefan Ivanell and Hugo Olivares
► OpenFOAM programming training, 19./20. Feb. 2018
    8 Feb, 2018
Dear FOAMer,

we conduct an

OpenFOAM programming course

at the Technische Universiät Braunschweig from

19./20. February 2018 in Braunschweig (D).

Topics of the course are:
  • Programming foundation-
    - Basics
    - Top-level code
    - Basic classes & data types
  • Programming practice
    - Programming tutorials
    regarding creation of own
    • solver
    • boundary conditions
    • functionObjects
    • libraries
    - Examples
    - Debugging
  • Programming in-depth
    - Tutorials on creating
    - numerical schemes
    - parallization
    - matrix solver
    - GPU plugins
Discount for students/scientists is available!

Further details

You may combine this training with the

2nd German OpenFoam User meetiNg (GOFUN 2018)
(free of charge, registration mandatory)

Best regards

► OpenFOAM introductory training. July 16th - 20th, 2018. UNIGE-Wolf Dynamics
  29 Jan, 2018
OpenFOAM introductory training. July 16th - 20th, 2018.

This training is aimed to those with little or no experience in the use of OpenFOAM®, or those who want to improve their skills using OpenFOAM® as a general-purpose CFD and Multiphysics solver. During the lectures, the attendees will be introduced to all aspects of OpenFOAM® as a general-purpose CFD solver, from structure and organization of the library, to setting cases, to assessing the convergence, to basic programming. Additionally, a few sessions will be dedicated to solid modeling, mesh generation, and visualization using open-source tools. During this training, we also cover the following advanced physics topics; turbulence modeling, multiphase flows, heat transfer, moving bodies, and source terms. Hands-on sessions will be organized, where the participants will have the opportunity to solve predefined cases (or their own cases) with the assistance and guidance of the course trainers. To help the learning process, a short introduction to the finite volume method will also be provided.

Prerequisites: no prior knowledge of OpenFOAM®, C++ or Linux is required. However, a basic knowledge of Linux is beneficial. A basic knowledge in CFD is also desirable.

This course is offered by wolf dynamics ( and in collaboration with the University of Genova

For more information, visit the following link
► OpenFOAM Training February-July 2018: Virtual, London, Houston, Berlin
  29 Jan, 2018
CFD Direct is running its OpenFOAM Training courses, Essential CFD, Applied CFD, Programming CFD and the new Cloud CFD. Courses are available:
Full Schedule

CFD Direct manage, maintain and develop OpenFOAM on behalf of the OpenFOAM Foundation. Our training instructor, Chris Greenshields, has managed every release of OpenFOAM since its initial release in 2004 and has conducted 400 days of OpenFOAM Training since 2008.

Our goal is to build CFD competency of our participants. Competency is the confidence to carry out CFD analysis, repeatedly, to a defined standard in a timely manner.

  • Confidence = not freezing at the keyboard.
  • Repeatedly = delivering a good solution, and then another.
  • Defined standard = understand what a good solution is.
  • Timely manner = working efficiently.
We build competency by teaching how to create CFD solutions through a process of design:
  1. Prototype – building a representative solution, from a template, rapidly (timely manner).
  2. Production – refining the solution by an iterative design process, making small changes and testing frequently (confidence).
  3. Packaging – making the solution reliable, cost effective and easy to use again and again (repeatedly, defined standard).
► Cloud CFD Course | OpenFOAM
  29 Jan, 2018
CFD Direct announces the release of their new 1 day Cloud CFD course, the fourth course in its portfolio of OpenFOAM Training. The course enables users to run CFD with OpenFOAM on AWS. It trains the tools and processes for inexpensive, secure and efficient cloud use. The course is initially scheduled as follows:
Course Modules | Who Should Attend | Further Details | Schedule and Booking

Read More

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