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CFD Online top

► Spam protection problems
  31 Aug, 2018
For some time we have been running a fairly aggressive and quite good spam filter from Atomicorp. This filter blocks a lot of unwanted traffic. It is based on an add-in called ModSecurity that inspects all communication with the web-server and drops traffic that the Atomicorp rules thinks is spam.

Sometimes this can cause unexpected problems. If you all of a sudden just aren't able to reach www.cfd-online.com when trying to post a message or submit a CFD-wiki page it can be this filter that has found something it thinks is spam in your data. It then drops your data and blocks your IP number from our servers for a certain time.

If you have problems with this filter and are suddenly unable to reach www.cfd-online.com please contact us on webmaster@cfd-online.com. We can disable certain rules if they are too restrictive, but we need to know the problems to be able to fix them.
► 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:

https://www.cfd-online.com/Forums/op...contributions/

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 webmaster@cfd-online.com 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 cfd-online.com for a certain period

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

Quote:

Forbidden

You don't have permission to access ....
If you are having problems with our filters please contact us directly via email to webmaster@cfd-online.com. 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 https://www.iplocation.net/find-ip-address
► 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:

https://play.google.com/store/apps/d...nlinecomForums

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

https://itunes.apple.com/app/id936248777

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.

NAFEMS top

► 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
► Call-for-Papers - We want you!
  19 Jun, 2018
Call for Papers - We want you!Get involved with the engineering analysis, modelling and simulation community and present at one of the many NAFEMS events taking place around the world. As part of our
► Rodney L. Dreisbach Recognised in 1st Class of NAFEMS Technical Fellows
    5 Jun, 2018
Rodney L. Dreisbach Recognised in 1st Class of NAFEMS Technical FellowsDr Dreisbach received the award at CAASE18 in Cleveland, Ohio, in recognition of his continued outstanding technical contribution
► 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

OpenFOAM ESI-OpenCFD top

► wmake: command not found error
  26 Sep, 2018
Hi i am trying to make a new solver and i followed the steps mentioned here:
https://www.cfdsupport.com/OpenFOAM-...t/node187.html

Initially there was no in OpenFOAM named $USER-v1806. i made the folder and followed the steps.

I have attached the command history for reference.

Please help me with compiling the solver.
► OPenFOAM v1806 released
    2 Jul, 2018
OpenCFD is pleased to announce release of OpenFOAM-v1806. This release extends OpenFOAM-v1712 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:
- Directional refinement of the mesh in snappyHexMesh
- New dry-run solver option for set-up check
- Improved field mapping in parallel
- New blended scheme for stabilisation
- New laser melting solver
- New swirl fan velocity boundary condition
- New In-situ processing with ParaView Catalyst
- New solvers documentation
- New fvOption documentation

Among the community contributions:
- Consolidation of moving mesh solvers
- Moving mesh functionality added to interIsoFoam
- New wave-mangrove interaction

... and many other features

The detailed list can be found at: http://openfoam.com/releases/openfoam-v1806/

OpenFOAM-v1806 can be downloaded as source code, precompiled Docker images for Linux, Windows and Mac operating systems from http://openfoam.com/download/installation.php or is available also in the spack HPC package manager via the 'openfoam-com' package.
► Training schedule for 2018
  19 Jan, 2018
Comprehensive Public Training Schedule for 2018 is now available. Please see our Website http://www.openfoam.com/training/schedule.php

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: http://openfoam.com/releases/openfoam-v1712/

OpenFOAM-v1712 can be downloaded as source code, precompiled Docker images for Linux, Windows and Mac operating systems from http://openfoam.com/download/installation.php or is available also in the spack HPC package manager via the 'openfoam-com' package.

OpenFOAM Foundation top

► OpenFOAM v6 Released
  10 Jul, 2018
OpenFOAM v6 Released

From the Release Announcement...

The OpenFOAM Foundation is pleased to announce the release of version 6 of the OpenFOAM open source CFD toolbox. Version 6 is a snapshot of the OpenFOAM development version which, through sustainable development, is always-releasable. It provides new functionality and major improvements to existing code, with strict demands on usability, robustness and extensibility.

OpenFOAM 6 includes the following key developments.
  • Conjugate heat transfer (CHT): improved usability, with simplified set up and running.
  • Rotating/sliding geometries: more robust AMI, and support for periodic cases.
  • Particle tracking: optimised computation and improved robustness.
  • Reacting multiphase models: phase change, reactions, drag, breakup, coalescence, etc.
  • Reactions/combustion: faster, full algebraic Jacobian, significant code redesign
  • Other models: water waves and films, turbulence, thermophysics, atmospheric flows
  • General: new boundary conditions, function objects, improved code compilation, etc
  • Further tools for more productive CFD with OpenFOAM.
  • Approximately 750 code commits, 350+ resolved issues
  • ISO/IEC 14882:2011 (C++11): tested for GCC v4.8+, Clang v3.7+, Intel ICC v17.0.4+.
OpenFOAM 6 is packaged for the following platforms.
The OpenFOAM 6 Source Pack can be compiled on suitable Linux platforms.

Credits

OpenFOAM 6 was produced by:
  • Core Team (CFD Direct): Henry Weller (co-founder & lead developer); Chris Greenshields (co-founder), Will Bainbridge
  • Developers/Maintainers: Bruno Santos, Francesco Contino, Mattijs Janssens (co-founder), Juho Peltola, Fabian Schlegel, Ronald Oertel, Timo Niemi
  • Patch Contributors: Tobias Holzmann, Kevin Nordin-Bates, Lorenzo Trevisan, Federico Piscaglia, Björn Pfeiffelmann, Jakub Benda, Nicolas Bourgeois, SeongMo Yeon, Stefan Hildenbrand
Licence

OpenFOAM 6 is distributed under the General Public Licence v3 by the OpenFOAM Foundation.
► OpenFOAM Open Day 2018
  28 Mar, 2018
The OpenFOAM Foundation is pleased to announce the OpenFOAM Open Day 2018.
  • Date: Wednesday 19th September 2018, 10:00 – 16:00 UK time.
  • Free event for the supporters of OpenFOAM who manage and maintain the software, contribute new developments and provide funding.
  • Free live stream worldwide to OpenFOAM users and CFD managers who register using a recognised company email address.
The OpenFOAM Open Day addresses the sustainable development of OpenFOAM, bringing together talks and discussion from contributors, supporters and maintainers of OpenFOAM. It is a free event streamed live worldwide to OpenFOAM users and CFD managers.

Register now for the live stream.

OpenFOAM Other Sources top

► Release of the novel explicit solid dynamics toolkit
    8 Oct, 2018
Hello,

After a few years of hard work, I am pleased to announce the open source release of the explicit solid dynamics toolkit implemented using OpenFOAM via this GitHub repository. More details can be found in this blog post.





Regards
Jibran
► CAMWA special issue on open-source numerical solver
    1 Oct, 2018
Computers & Mathematics with Applications (Elsevier, current impact factor 1.860) will launch a special issue dedicated to open-source numerical solvers for partial differential equations (PDEs) co-edited by Qingang Xiong (Senior Scientist, General Motors, USA), Vadym Aizinger (Senior Scientist, Alfred Wegener Institute for Polar and Marine Research, Germany), Fei Xu (R&D Engineer, Ansys Inc, USA), and Guillaume Ducrozet (Associate Professor, Ecole Centrale de Nantes, France).
The primary purpose of this special issue is to provide an overview of the progress in this rapidly developing area and to identify current trends and near-term prospects in connection with the algorithm design, theoretical development, and various areas of application of open-source software for PDEs. Our goal is to let authors focus on the software design, algorithms, applications and future prospects of open source PDE solvers. Articles focusing on these topics are usually very difficult to publish in refereed journals in either applied mathematics, or engineering, or computer science. In addition, we attempt to facilitate better communication between the authors and the users of such packages by providing the developers with a forum to present their work and supplying an up-to-date list of open source PDE solvers.
Major numerical methods covered in this special issues include, but not limited to, finite difference methods, finite element methods, finite volume methods, spectral methods, meshfree/meshless methods (e.g. LBM and SPH), gradient discretization methods, domain decomposition methods, time discretization methods, as well as multigrid methods (in conjunction with spatial discretization).
Computers & Mathematics with Applications (Elsevier, current impact factor 1.860) will launch a special issue dedicated to open-source numerical solvers for partial differential equations (PDEs) co-edited by Qingang Xiong (Senior Scientist, General Motors, USA), Vadym Aizinger (Senior Scientist, Alfred Wegener Institute for Polar and Marine Research, Germany), Fei Xu (R&D Engineer, Ansys Inc, USA), and Guillaume Ducrozet (Associate Professor, Ecole Centrale de Nantes, France).
The primary purpose of this special issue is to provide an overview of the progress in this rapidly developing area and to identify current trends and near-term prospects in connection with the algorithm design, theoretical development, and various areas of application of open-source software for PDEs. Our goal is to let authors focus on the software design, algorithms, applications and future prospects of open source PDE solvers. Articles focusing on these topics are usually very difficult to publish in refereed journals in either applied mathematics, or engineering, or computer science. In addition, we attempt to facilitate better communication between the authors and the users of such packages by providing the developers with a forum to present their work and supplying an up-to-date list of open source PDE solvers.
Major numerical methods covered in this special issues include, but not limited to, finite difference methods, finite element methods, finite volume methods, spectral methods, meshfree/meshless methods (e.g. LBM and SPH), gradient discretization methods, domain decomposition methods, time discretization methods, as well as multigrid methods (in conjunction with spatial discretization).
The guest editors of this special issue invite authors of open-source packages interested in having their package listed in the editorial as well as the potential contributors to the special issue to fill out by November 30th a short information sheet (https://goo.gl/forms/4LdrD3BCVGtMAZef1). Please note that, required by the journal, a printed published paper must contain at least 15 pages. The estimated manuscript submission deadline is June 30, 2019. The guest editors encourage you to help spreading this "Call for Papers" to your colleagues and collaborators active in this area.
► OpenFOAM course for beginners
  12 Sep, 2018
Dear All,

After a few years of procrastination, I have finally managed to produce a self-taught course on learning OpenFOAM (https://www.researchgate.net/publica...ds-on_training). This course material is intended for beginners with no previous experience of using OpenFOAM. Existing users can also benefit by broadening their knowledge. In this course we use OpenFOAM Foundation release (version 6) and cover various topics including:

Introduction
  • Basics of OpenFOAM.
  • Various OpenFOAM forks available.
  • Advantages of using OpenFOAM.
  • Plenty of reference material available on the internet.

OpenFOAM code
  • Understanding the OpenFOAM code structure.
  • Use of environment variables and aliases in OpenFOAM.
  • Getting familiarised with OpenFOAM applications and utilities.

OpenFOAM simulations
  • Understanding the tutorial directory structure.
  • Meshing support in OpenFOAM.
  • Problem setup including initial and boundary conditions.
  • Understanding OpenFOAM solver input and time control files.
  • Post-processing with ParaView.

Programming with OpenFOAM
  • Basics of OpenFOAM programming.
  • Introduction to OpenFOAM classes.
  • Concepts of dimensional compatibility and equation mimicking.
  • Overview of various mathematical operations available.
  • Obtaining mesh related information in OpenFOAM.
  • Compilation of an OpenFOAM code.

Hands-on tutorials
  • Meshing with blockMesh and snappyHexMesh.
  • Understanding OpenFOAM error messages.
  • Effective use of linux commands including the search of relevant information.
  • Use of various useful OpenFOAM utilities.
  • Understanding the basics of parallel computing in OpenFOAM.
  • Effective utilisation of computational resources for parallel computing.
  • Selection of an OpenFOAM solver for a given problem.
I hope that this material would be useful for people starting to learn OpenFOAM. Feel free to drop me a message if you find any bugs, I will try to incorporate them in an updated version.

Note:
This offering is not approved or endorsed by OpenCFD Limited, producer and distributor of the OpenFOAM software and owner of the OPENFOAM® and OpenCFD® trade marks.
► OpenFOAM now available on the HPCBOX HPC cloud platform
    9 Aug, 2018
OpenFOAM is now available on the HPCBOX HPC cloud platform. Versions v5 and v6 of OpenFOAM are pre-installed and integrated with our desktop-centric, workflow oriented HPC cloud platform. OpenFOAM can be used in distributed parallel mode from a rich desktop interface and can be seamlessly run over multiple nodes interconnected with a high speed Infiniband fabric. ParaFOAM can be used with hardware accelerated 3D on NVIDIA graphics cards for post-processing.

This is a Pay-As-You-Go offer, meaning, you will be able to scale-out/scale-in your HPC cluster by adding more nodes and shutting down existing nodes when you are not running the solver. Moreover, the entire cluster, including the Master node can be shutdown when not in use and restarted later for use, it's like having your own personal HPC cluster, readily available for use as needed.

There is an article with a briefing on functionality and availability at https://goo.gl/kvTrZq. More information can also be found at www.drizti.com/hpcbox and www.drizti.com/applications

Feel free to post any queries you might have.

Thanks.
► Training OpenFOAM for Propeller and Turbomachinery: Rostock, 29./30.08.2018
    1 Aug, 2018
Dear CFD Users,

developers who want to use OpenFOAM to calculate propellers and turbomachinery may be interested in our training on this topic.
The next one will take place on 29./30. august 2018 in Rostock, Germany.

For more details on content and registration, please visit this page: http://www.foamacademy.com/events/ev...ry-propellers/

Attachment 64837

We are looking forward to meet you!

Regards, Hannes

Attached Images
File Type: jpg ducted_propeller_scooter.jpg (23.8 KB)
► OpenFoam log file monitor
  25 Jul, 2018
Hi guys,

I uploaded an early version of my log file monitoring tool to my github page https://github.com/greole/foamMon . The tool aims to give an overview of
the progress of long running simulations. Feel free to try it out.


Cheers,
Gregor

OpenFOAM Wiki top

► Contrib/waves2Foam
  11 Oct, 2018

Modifications to the Source Code (History)

← Older revision Revision as of 17:59, 11 October 2018
Line 52: Line 52:
   
 
== Modifications to the Source Code (History) ==
 
== Modifications to the Source Code (History) ==
  +
* 2018-10-11 19:59:00: (r2129) Consistency update of FOAM_USER to WAVES. Decay function to streamFunction (optional)
 
* 2018-09-28 11:17:21: (r2128) IOstream flushing bug in surface elevation sampling resolved
 
* 2018-09-28 11:17:21: (r2128) IOstream flushing bug in surface elevation sampling resolved
 
* 2018-09-21 10:15:36: (r2127) Bug resolved in bichromaticSecond in evaluation of eta
 
* 2018-09-21 10:15:36: (r2127) Bug resolved in bichromaticSecond in evaluation of eta

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