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► Email problems on forums - Forum registrations failed
  29 Jun, 2023
For the last couple of weeks we have had problems with outgoing emails from the forums on CFD Online. I hope that we have now solved the problems and that outgoing emails are now working again.

This means that everyone who registered on the forums from June 16 until today Jun 29 have not received any activation email to activate their forum account. This makes it impossible to activate your forum account.

You can ask for a new activation email to be sent to you using this form:

CFD Online Discussion Forums - Email Activation Codes (

I apologize about the problems.
► New COMSOL Forum on CFD Online
  19 Feb, 2023
By popular request from many users we have today opened a dedicated forum on CFD Online for the code COMSOL. The COMSOL forum can be found here:

We have also moved all old COMSOL related threads to the new COMSOL forum. In the last years we have seen an increased traffic related to COMSOL and the new forum starts off with 290 old threads and 625 messages related to COMSOL.

I hope that the new COMSOL forum will become active and that it will make it easier for COMSOL users to discuss with each other.
► Some Data Lost, Server Restored From Backups
    4 Feb, 2023
The virtual server running crashed during an OS update late Friday, Feb 3, 2023. In order to get up and running again we were forced to restore a backup. The backup had been made very early on Friday.

Hence, most new additions to CFD Online, like new forum messages, new job-ads, new announcements and new events that were posted on Friday, Feb 3, 2023, have been lost.

If you posted something on Friday that is now gone please re-post it.

We are very sorry about this incident. I'm glad that we had a fairly recent backup so we did not loose a lot of data. Now I need some sleep...
► CFD Online on Mastodon
  19 Dec, 2022
We are now up on Mastodon. You can find CFD Online here:

If you already are on Mastodon you can reach our page at

We will publish important announcement related to our website services both on Mastodon and Twitter. If you have problems to reach CFD Online you should first check us on Mastodon to see if this is a general problem. Frequent CFD Online users are advised to follow us on Mastodon.


► NAFEMS World Congress 2019 Preliminary Agenda Launched
  15 Mar, 2019
NAFEMS World Congress 2019 Preliminary Agenda LaunchedQUEBEC CITY, CANADA, & GLASGOW, UK, MARCH 15TH 2019 – NAFEMS, the International Association for the Engineering Analysis, Modelling and
► Keynote Speakers announced for NAFEMS World Congress 2019
    7 Feb, 2019
Keynote Speakers announced for NAFEMS World Congress 2019The International Association for the Engineering Analysis Community Launches Extensive Roster of Keynotes for it’s Biennial World Congre
► Memorandum of Understanding between NAFEMS, prostep ivip, PDES, Inc. and AFNeT on behalf of LOTAR and CAE-IF signed 16 October 2018
    6 Feb, 2019
Memorandum of Understanding between NAFEMS, prostepivip, PDES, Inc. and AFNeT on behalf of LOTAR and CAE-IF signed 16 October 2018NAFEMS, prostep ivip, PDES, Inc. and AFNeT on behalf of LOTAR and CAE-
► 5 Reasons to Submit your Abstract for the NAFEMS World Congress 2019
    9 Nov, 2018
5 reasons to submit your abstract for the NAFEMS World Congress 2019 #NAFEMS19 1. Influence the Direction of SimulationNAFEMS is the voice of the CAE community – as simulation moves towards the
► Latest NAFEMS Publications
    1 Nov, 2018
Latest NAFEMS PublicationsThe following publications have been published recently and sent to our members.How To Perform Linear Dynamic Analysis This book aims to provide guidance on the usage of comm
► NAFEMS World Congress 2019 - Call for Papers Now Open
  30 Jul, 2018
NAFEMS are delighted to announce that the call for papers for the 2019 NAFEMS World Congress, in Quebec City, Canada, 17-20 June 2019, is now open.Engineering analysis, modelling and simulation are dy

OpenFOAM ESI-OpenCFD top

► OpenFOAM v2306 released
    5 Jul, 2023
New version of OpenFOAM-v2306

OpenCFD is pleased to announce the June 2023 release of OpenFOAM® v2306. This release extends OpenFOAM-v2212 features across many areas of the code. The new functionality represents development sponsored by OpenCFD's customers, internally funded developments, and integration of features and changes from the OpenFOAM community.

Full information about the release can be found at

  • Help for users is provided in the user upgrade guide
  • Help for developers is provided in the developer upgrade guide
  • Note that the minimum C++ standard will increase from C++11 to C++17 in 2023

  • New documentation system
  • Changes to expressions

  • Improved checkMesh
  • Improved snappyHexMesh balancing for large meshes

  • New cache-gradient mechanism in finiteArea
  • New parallel preconditioners
  • Community contribution: New FPCG linear solver

Solvers and physical models
  • Improved vanDriest LES delta model
  • New Lagrangian particle force: Coulomb
  • Community contribution: New fvOption: fanMomentumSource
  • New fvOption: limitTurbulenceViscosity
  • Improved rigid-body motion constraint: axis

Boundary conditions
  • New boundary condition: specularRadiation
  • New uniformMixed condition
  • New finite area boundary conditions

  • Improved Lagrangian function objects
  • Improved function objects: forces and forceCoeffs

  • Improved parProfiling function object
  • Scotch - support for multi-level decomposition
  • Non-blocking linear solver
  • Improved masterCoarsest processor agglomeration
  • General changes in parallel (MPI) handling

In addition to source code packages suitable for compilation on a variety of Linux and other POSIX systems, this release also has a number of pre-compiled binary packages for Linux and MS Windows.
► OpenFOAM v2212 released
  13 Feb, 2023
New version of OpenFOAM-v2206

OpenCFD is pleased to announce the December 2022 release of OpenFOAM® v2212. This release extends OpenFOAM-v2206 features across many areas of the code. The new functionality represents development sponsored by OpenCFD's customers, internally funded developments, and integration of features and changes from the OpenFOAM community.

Full information about the release can be found at

Among the new features, users may find:

  • Improved checkMesh
  • Improved changeDictionary utility
  • New snappyHexMesh curvature-based refinement
  • Improved setFields
  • New clipPlane topo-set

  • Improved overset mesh
  • Community contribution: New adjoint objective functions
  • New parallel-consistent geometry scheme
  • New finite area least squares edge interpolation
  • Improved MappedFile
  • Community contribution: Improved DEShybrid scheme

Solvers and physical models
  • Improved view factor radiation modelling
  • Community contribution: Improved DES turbulence models
  • Improved heat exchanger modelling
  • New zone-based thermophysical properties
  • Improved Lagrangian output cont.
  • New liquid film conditional splashing
  • New solid reaction-rate model

Boundary conditions
  • New sorption conditions

  • New EnSight mesh reader
  • Improved Ensight output
  • Improved ensightWrite, vtkWrite function objects
  • Improved surface writers
  • Improved noise utility
  • New turbulence resolution quality estimation
  • Improved histogram generation
  • Improved heat transfer coefficient function object
  • Improved fvOption output
  • Improved turbulenceFields function object

  • New multiple master processor support for GAMG agglomeration
  • Improved finite area mesh creation

In addition to source code packages suitable for compilation on a variety of Linux and other POSIX systems, this release also has a number of pre-compiled binary packages for Linux and MS Windows.

Full information about the release can be found at

OpenFOAM Foundation top

► OpenFOAM v11 Released
  11 Jul, 2023
OpenFOAM v11 Released - See Full Announcement

The OpenFOAM Foundation is pleased to announce the release of version 11 of the OpenFOAM open source CFD toolbox. Version 11 introduces modular solvers written as classes, in contrast to the traditional application solvers, integral to OpenFOAM since icoFoam in 1993. Modular solvers are simpler to maintain and extend, and are more flexible for multi-region simulations, e.g. conjugate heat transfer (CHT) with any type of flow, e.g. multiphase. Everything is backward-compatible, so: 1) application solvers will still compile in OpenFOAM; 2) launching an old application solver, e.g. simpleFoam, executes a script which runs the incompressibleFluid module on a single region.

OpenFOAM 11 includes the following highlights.
  • Modular Solvers: class-based solvers for greater flexibility, e.g. multi-region simulations.
  • Multiphase: vastly improved consistency and conservation in the multiphaseEuler module.
  • Transport: added anisotropic thermal conductivity.
  • Thermophysical: standardised the specification of property names in input file keywords.
  • Heat transfer: simplified critical boundary conditions for heat transfer between regions.
  • Particle tracking: generalised statistical distributions for size distributions in particles.
  • Liquids Films: full replacement which conserves mass and integrates to other models.
  • Meshes: redesign of dynamic mesh functionality and consolidated NCC.
  • Function Objects: improved field averaging and visualisation function objects.
  • Models and Constraints: numerous new models and constraints.
  • Boundary Conditions: consolidated mapped conditions and introduced MRF conditions.
  • Case Configuration: new foamToC application lists models and options in OpenFOAM.
  • Programming: new finite volume functions and improvements to algorithm sequences.
  • 964 code commits, 133 resolved issues.
  • ISO/IEC 14882:2011 (C++14): tested for GCC v5.5+, Clang v16+ (v10+ should also work).
OpenFOAM 11 is packaged for the following platforms, with ParaView 5.10.1 including Mesa with LLVM/Gallium acceleration for systems without a (supported) graphics card:
The OpenFOAM 11 Source Pack can be compiled on suitable Linux platforms.


OpenFOAM 11 was produced by:

OpenFOAM 11 is distributed under the General Public Licence v3 by the OpenFOAM Foundation.

OpenFOAM Other Sources top

► OpenFOAM Research Software Engineering group
  29 Sep, 2023
After meeting at the OpenFOAM Workshop, myself and a few more people writing code that relies on OpenFOAM recently started a "Special Interests Group" to discuss anything related to software engineering practices in relation to OpenFOAM.

Short description from the webpage: "The RSE Special Interests Group aims to bring together developers of OpenFOAM and OpenFOAM-related projects. The main goal of the committee is to investigate software engineering practices that can facilitate the development of OpenFOAM and its integration with downstream and related projects, as well the FAIR (Findable, Accessible, Interoperable, and Reproducible) management of community-contributed research software and data. "

We have our second meeting today, 29/09/2023 at 13:00 CET (Germany), online, open to the public. Topic: "Reproducible code and cases, with examples from the OpenFOAM Journal".

Anyone can just join and leave at anytime, there is no registration required, or any commitment expected.

You can already vote for the next meeting date, and propose a topic here. We will be announcing some of the meetings here, but check the webpage for the latest information.
► OpenFOAM and General CFD Advanced Training - Winter Session 2024 (Online)
    6 Sep, 2023
OpenFOAM and General CFD Advanced Training - Winter Session 2024 (Online)

2024 Winter session (online)
February-March, 2024

Topics to be covered during this session,

FEB 5 - 7 - 9
Basic solid modeling for CFD using Onshape and mesh generation using OpenFOAM tools *

FEB 12 - 14 - 16**
Turbulence modeling in general CFD and OpenFOAM - Theory and applications

FEB 19 - 21 - 23**
Multi-phase flows modeling in general CFD and OpenFOAM - Theory and applications

MAR 4 - 6 - 8**
Introduction to the FVM method. Standard practices in general CFD with applications to OpenFOAM

MAR 11 - 13 - 15**
Moving meshes, rigid body motion, adaptive mesh refinement, and overset meshes

MAR 18 - 20 - 22**
Design of experiments, space exploration, and numerical optimization using Dakota and code coupling Dakota-OpenFOAM

MAR 26 - 28 ***
Introduction to meshing using Ennova CFD - OpenFOAM case setup with Ennova GUI
We are offering a 20% discount to all participants taken more than two modules.

* The first day is dedicated to solid modeling and basic meshing, and the other two days are dedicated to only meshing.

** Review session + Q&A session

*** This module is free. Seats are limited to 10. Applicants who have reserved at least one distinct training module will be given priority consideration. To book a seat send an email to

More info at this link,

Hurry up and book your seat!
► OpenFoam Combustion SIG
  14 Aug, 2023
Dear OpenFoam Combustion SIG members,

This email summarizes the SIG meeting of combustion researchers using Openfoam, that took place on Wed June 12 at the 18th OpenFOAM workshop in Genoa.

Please use this link to sign up for the SIG mailing list –
Even if you are in this email, please sign up so that I can create a unified list.
Forward this link to all interested parties who would like to contribute to and benefit from the OF combustion SIG.
Once I get a critical mass of submissions, I will send out a separate email to setup regular emails and virtual meetings.

Below is the summary from our meeting and I welcome feedback and inputs from you. Feel free to forward this to other combustion researchers using openfoam.

FOCUS AREAS (from participant input)

IC Engines
Gas Turbine Combustion
Multiphase flows
Spray simulations
Hydrodynamic stability for reacting flows
Use of H2, Ammonia, Methanol, Diesel oil as fuels (ICE applications, GT applications)
Detection of critical points for bifurcation in flame stability, ex. Oscillating stable flames
Chemical process engineering, catalytic combustion
Riemann solvers
Fast particle method for combustion

INTERESTS/NEEDS (from participant input)

community driven unified framework for turbulent combustion modeling such as PDF approaches.
post-processing of reacting flow data
Standard Benchmarks to compare OpenFOAM simulations
Interest in load balancing
Turbulence-Chemistry Interaction modeling
Tabulated methods – improving them
Inhomogeneous combustion
Tuning models – for ex. Flame propagation tuned for TCI… tuning is a bottleneck


Outdated SIG Combustion website:

Need an action plan for website content and a lead who can track and update this site.

Community driven and collective effort of shared infrastructure, codes and test cases

Identify reference test cases for premixed and non-premixed combustion
As a start, we can consider the DLR grand challenge case from exaFoam.
Need a good solution for tabulated chemistry / flamelet based methodologies

Community driven maintained code of physics-validated reactingFoam for laminar, RANS, LES in one code

Add features that improve functionality – Multicomponent diffusion, AMR, load balancing
See next section for more detailed breakdown of this.

Community Request: Please reach out to me…

If you are interested in leading/supporting (1) above
With further inputs on a robust and unified test case for testing variations of TCI models, reduced order chemistry models
If you would like to lead a code development effort on item (2) for a unified code base – PDF methods, tabulated chemistry etc.
If you would like to work on adding functionality (in 2 & 3 above) and testing it with the community

TOPICS/DISCUSSION specific to reactingFoam
Special thanks to Domenico Lahaye, Francesco Marra, Eric Daymo and Matthias Hettel for putting together the contents of this section.

Document Current Version of reactingFoam

Goal: provide blueprint for discussions on the solvers; future developments; recognize original developers;
what is already there? whose support do we need? who to appoint as editor?

Document the following items
  1. compressible turbulent stationary and transient flow (RANS, URANS, LES (mesh requirements?), DES, DDES, blending function with a-posteriori check)
  2. chemistry (transport, reaction, multi-component, non-unit Lewis number, tabulation, mechanism reduction)
  3. radiative heat transfer (P1, P3, fvDOM, submodels for emission)
  4. turbulence-combustion interaction,
  5. turbulence-radiation interation,
  6. spatial discretization (fvSchemes, including adaptive mesh refinement),
  7. temporal discretization (operator splitting for flow and chemistry),
  8. linear solvers (fvSolution)

(Documentation at and Cocoon project for bubbleFoam seems to be outdated)
(What can we recycle from manual Fluent, ConvergeCFD, CFD-online, wikipedia and other sources?)
(Take advantage of GitLab initiative by ESI?)

Extend Set of Combustion Tutorials

Goal: extend set of combustion tutorials with both small (stressing solver capabilities) and large (stressing computational limitations of solver) cases; include comparison with experimental data and other simulation software;

2.1. small test cases: what is currently presents? what is missing? (TNF workshop, Sandia A though F, HM1 test cases, Delft Jet-in-co.Flow, DLR burner, 1D laminar flame allowing to numerically follow the flame propagation, spray, soot, DES, DDES, LES)

2.2. large (exaFoam) test cases: see [1];


Develop Steady-state Variant of reactingFoam

Goal: develop steady-state (ddt = 0) for laminar and/or RANS models having a steady state solution
(cfr. opening talk Hrv Jassak at 18th OFW Genua):
Eric Daymo: a) compare with DUO-solver@KIT; b) good steady-state results with laminarSMOKE or EDCSmoke, unclear why;

Further Develop/Check/Document/Standardize Adaptive Mesh Refinement for reactingFoam

Goal: adaptive mesh for accuracy and time of computation (see fireFoam by FMGlobal at 18th OpenFoam workshop) (laminar for flame propagation, turbulent, accelerating) and dlbFoam for load balancing (dlbFoam)

See previous work by Clapointe:
and more recent work: e.g.
What is required to make adaptive mesh refinement work? See version-10 and version-11 of the Foundation Version of OpenFoam;

Eric Daymo: successful in making adaptive mesh refinement work using functionObjects ion Foundation version; further verification is required;

[1]: Clapointe:
[2]: and references cited therein

Further Develop/Check/Document/Standardize Multi-Component Species Transport for reactingFoam

Goal: non-unit Lewis number, non-Fickian

[1]: and references cited therein

Further Develop/Check/Document/Standardize Theoretically Sound Combustion Models

Goal: assumed beta-PDF, transported PDF

[1]: work by Polimi (libICE)
[2]: work by TU Delft (Ma and Roekaerts, cfd-online thread)
[3]: slides Lucchini at

Further Develop/Check/Document/Standardize Tabulation and Mechanism Reduction: see work of previous work by Francesco Contino (contino-2012) and recent work by Francesco Marra (see ex. 18th OpenFoam Workshop)

Develop Coupled Pressure-Velocity Solve for reactingFoam

Maintain/test/document Code

Adapting code to evolving OpenFoam distributions?
What can be automated using automated testing and github actions or gitlab pipelines?
► 18 OpenFOAM workshop - Updates and grants
  21 May, 2023
OpenFOAM users, developers, and researchers will meet in Genoa, Italy, from 11 to 14 July 2023, for the 18th OpenFOAM Workshop.

Registration is open; more information at the following link,

Are you an undergraduate or graduate student from an under-represented country or with no or limited support from their institutions to attend the Workshop? You can apply for a grant to attend the event online. More info at the link below,

See you in Genoa,

The organizing committee
► 18th OpenFOAM Workshop - Abstract submission deadline extension
  28 Feb, 2023
OpenFOAM users, developers, and researchers will meet in Genoa, Italy, from 11 to 14 July 2023, for the 18th OpenFOAM Workshop,

We are very pleased to announce that the abstract submission deadline for the 18th #OpenFOAM Workshop #OFW18 has been extended to 31 March 2023 (23:59 CET). Come and share your most recent work, research and experiences using OpenFOAM.

Abstracts can be submitted for oral or poster presentations. For more information, please check the submission guidelines,
► 6th French/Belgian OpenFOAM user conference, June 13-14th 2023, Grenoble (FRANCE)
  25 Jan, 2023
Dear all,

The 6th French/Belgian OpenFOAM users conference will be held in Grenoble, France, on June 13 and 14th 2023.

Whether you are a new user or an experienced one, this is a good opportunity to share your experience, struggles and achievements with the community in a friendly atmosphere.

Call for contributions and registration are currently open.
To keep things simple, contributors are only asked to submit a presentation title. Contributions are selected on a first-come, first-served basis so do not hesitate to submit a title now if you want to be sure to get a slot.

Important dates:
  • March 15 2023: end of early bird registration
  • June 13-14 2023: conference

More information:

Save the date!
Yann, on behalf of the organizing committee

OpenFOAM Wiki top


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