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.

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:

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

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.

Please find CFD Online's Privacy Policy here:

https://www.cfd-online.com/About/privacy_policy.php

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.

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: https://www.cfd-online.com/Forums/pr...o=editpassword. If you have forgotten your password you can request a new one to be set and emailed to you at https://www.cfd-online.com/Forums/login.php?do=lostpw

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 webmaster@cfd-online.com.

We are very sorry about this incident and would like to sincerely apologize to all of our fantastic users.

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 cfd-online.com 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: https://www.cfd-online.com/Forums/re...o=requestemail

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 cfd-online.com 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, ...)

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):

• 06 Feb - Aeroacoustics
• 20 Feb - Overset

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.

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.

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 http://openfoam.com/releases/openfoam-v1706/

OpenFOAM-v1706 can be downloaded as source code, precompiled Docker images for Linux, Windows and Mac operating systems from http://openfoam.com/download/installation.php.

OpenCFD invites all users to join a free online release webinar. Please register here: https://www.esi-group.com/company/ev...atures-webinar

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.

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:

• Ubuntu Linux: packaged installation for Ubuntu 14.04, 16.04 and 17.04;
• Other Linux: installation with a Docker container; or compilation from source code;
• Windows 10: installation using Windows Subsystem for Linux with Ubuntu packs;
• macOS: installation with a Docker container.

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”.

Combustion

• 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.

Meshes

• 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 5.3.1.4
• 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 http://cpp.openfoam.org
• 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 5.2.3.4; 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

Contributors

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.

Dear FOAMers, this year's OpenFOAM Stammtisch United will be hosted by Helmholtz-Zentrum Dresden - Rossendorf e.V, Institute for Fluid Dynamics on the 24. and 25. May Addition information can be found in the announcement.

Best Regards,
Henrik

Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

We are pleased to announce the release of dissolFoam-v1706 for solving moving boundary problems where the motion is driven by the gradient of a scalar field, for example temperature or concentration.

https://github.com/vitst/dissolFoam/releases/tag/v1706

The release contains a solver, libraries, utilities and sample cases. The libraries include a number of extensions to the OpenFOAM-v1706 release including:

a) coded boundary conditions for linear and non-linear Robin boundary conditions, and a Danckwerts boundary condition.

b) normalMotionSlip - an extension to the slip class to include normal motion.

c) steadyStateControl - for steady flow problems. Modifies simpleControl to prevent the time counter incrementing.

d) velocityDeltatLaplacianFvMotionSolver - adds outer loop iterations to the velocityLaplacianFvMotionSolver class; required by the non-linear projections in the boundary conditions for pointMotionU. Converts velocities to small displacements to allow for convergent outer-loop iterations.


Best regards

Dear OpenFOAM user,

We are pleased to announce the 3rd French OpenFOAM® Users' Meeting which will be will be conducted 23-24 May 2018 at the University of Valenciennes, FRANCE.

Objectives:

This event aims to bring together OpenFOAM® users as well as those interested in potential applications of the software. People from academia and industry are invited to present advances in their relevant research and development fields exchanging ideas and information in an interdisciplinary environment.

Keynotes:

• The OpenFOAM Maintenance Plan - Chris Greenshields (Director of both CFD Direct and the OpenFOAM Foundation)
• Overview of the combustion capabilities and ongoing developments: from handling chemical mechanisms to integrating turbulence - Francesco Contino (Vrije Universiteit Brussel)

Tutorial sessions:

• Introduction to HELYX-OS, the Open-source GUI for OpenFOAM® - Francisco Campos (ENGYS)
• Modeling of turbulent heat transfer: RANS & LES - Lilla Kapa KOLOSZÁR (VKI)
• Introduction of a multi-region, multiphase (VoF) solver - Lilla Kapa KOLOSZÁR (VKI)

For more information (program, important dates, registration, accommodation, etc.) please visit the conference website or contact the Foam-U association.

Best regards,
The organization committee

Dear FOAMer,

Due to the strong demand
-- the last intriductory course during the
2nd German OpenFOAM User meetiNg (GOFUN)
was fully booked up --
we organize an additional

OpenFOAM introductory course

27. - 28.03.2018 in Braunschweig (D).
at the Technische Universiät Braunschweig

Topics:

Getting started
Philosophy of the project
Structure of OpenFOAM cases
Top-level code
Pre-processing and running of own applications
Meshing/mesh import
Advanced meshing/snappyHexMesh
Finite volume schemes
Numerical schemes

Solver (PISO/PIMPLE/SIMPLE)
Best practice
Initial and boundary conditions
Turbulence modelling (RANS/LES/DES)
Parallel simulations
Post-processing in Paraview
Animations
Complex simulations f.i.
- free surface
- mesh refinement
- complex geometries (mesh import/snappyHexMesh)
- external aero dynamics Process integration and automation



Further information on our web-pages
http://www.move-csc.de/training/trainingOF_eng.html


Best regards
ThG

Numerical Modelling of Coupled Problems in Applied Physics with OpenFOAM (NUMAP-FOAM) Summer School 2018 at the University of Zagreb, Croatia

Faculty of Mechanical Engineering (www.fsb.unizg.hr), University of Zagreb, Croatia (www.unizg.hr), announces the 13th edition of the School on Modelling of Coupled Problems in Applied Physics with OpenFOAM (NUMAP-FOAM) for graduate students and young researchers in Zagreb in August 2018. The Programme Chairs are Professor Hrvoje Jasak and Professor Zeljko Tukovic.


Description

The School aims to provide tuition at expert level for a small and selected group of students and researchers in academia and industry. The idea of the NUMAP-FOAM School is to expand the physical modelling knowledge, numerics and programming skills of attendees using OpenFOAM in their research through direct supervision and one-to-one project work. Lectures on chosen topics of mathematical and numerical modelling pertinent to coupled problems in engineering and applied physics will be delivered in addition. For further references, please contact the organisers or one of more than 150 alumni of previous editions of the School.

To ensure quality of work and individual supervision, the number of places is strictly limited.


Place and Time

The Summer 2018 edition NUMAP-FOAM shall take place between Monday 20 August and Friday 31 August 2018, inclusive (10 working days). The School shall be held at the Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lucica 5, Zagreb, Croatia.


Topic Areas

Students are invited to propose their own topics for the School. Preference shall be given to project which require complex programming in OpenFOAM, advanced software design and implementation of complex and coupled physical models in OpenFOAM. Special topics for this year's Summer School are naval hydrodynamics, solidification / phase change and higher order discretisation methods.


How to Apply: NUMAP-FOAM Summer School 2018

To apply, please write a one-page description of the project you wish to work on, with current problems and goals to be achieved at the School. Application is open to all students on graduate University courses, as well as researchers in companies and government organisations with sufficient knowledge of OpenFOAM.

Please note this is NOT an introductory OpenFOAM course: significant understanding of the project and software is a pre-requisite for application.

Deadline for application is 1 May 2018. Successful candidates will be informed within three weeks of closing.


Accommodation and Costs

Attendees to the School should plan to cover their travel and accommodation expenses, ideally bringing a laptop computer with them. A registration fee for the School is EUR 2000 per attendee.


Contact Details

For further details and submission of project proposals, please contact prof. Hrvoje Jasak at hrvoje.jasak@fsb.hr. For local organisational details please contact NUMAP-FOAM Secretary Mrs. Silvana Skoko-Gavranovic at silvana.skoko-gavranovic@fsb.hr.


Legal

OPENFOAM is a registered trade mark of OpenCFD Limited.

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: http://www.technicalcourses.net/port...php?curso_id=8