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ReleaseNotes.html
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<div id="content">
<h1 class="title"><b>Release notes for foam-extend-5.0</b> <b>Version 5.0 - Cambridge</b></h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#org91c5e77">1. Overview</a></li>
<li><a href="#org5f93325">2. Installation</a></li>
<li><a href="#org1564cfd">3. Compatibility</a></li>
<li><a href="#orge965305">4. Main differentiators between foam-extend and OpenFOAM</a></li>
<li><a href="#org58de222">5. New features in foam-extend-5.0, since foam-extend-4.1</a></li>
<li><a href="#orgda5bb1e">6. Major new features:</a></li>
<li><a href="#orgc6c30d8">7. Software engineering</a></li>
<li><a href="#org804948d">8. Consistency with previous version</a></li>
<li><a href="#org7d3852e">9. Overview of Development</a></li>
<li><a href="#orgd5f40f4">10. Reporting bugs</a></li>
<li><a href="#org99c69c6">11. How to contribute</a></li>
<li><a href="#org2b35aaf">12. List of Contributors:</a></li>
</ul>
</div>
</div>
<p>
###############################################################################
</p>
<div id="outline-container-org91c5e77" class="outline-2">
<h2 id="org91c5e77"><span class="section-number-2">1</span> Overview</h2>
<div class="outline-text-2" id="text-1">
<p>
The foam-extend project is a fork of the OpenFOAM® open source
library for Computational Fluid Dynamics (CFD). It is an open
project welcoming and integrating contributions from all users and
developers. Previously known as OpenFOAM-dev and OpenFOAM-extend,
it contains bug fixes and performance improvements, as well as
extensions and additional features provided by community
contributors (see file ListOfContributors).
For a full list, see below and previous release notes at:
<a href="http://sourceforge.net/p/foam-extend/wiki/Home/">http://sourceforge.net/p/foam-extend/wiki/Home/</a>
</p>
<p>
Version 5.0, nicknamed "Cambridge", is the current version of
foam-extend. The release continues the tradition and spirit of the
original FOAM code developed by prof. Jasak and Mr. Weller during
their time at Imperial College and released as the general purpose
CFD/CCM package by Nabla Ltd. in 2000. In this spirit, we reverted
18 December 2013 to the original numbering scheme (foam-2.3.2, 13
December 2004) as release number 3.0. Visit <a href="http://foam-extend.org">http://foam-extend.org</a>
for more information.
</p>
<p>
OPENFOAM is a registered trademark of ESI Group. OpenFOAM-extend and
foam-extend are a community effort not endorsed by ESI Group.
</p>
<p>
This is a major release of foam-extend-5.0 created from the
nextRelease branch of foam-extend-4.1 which consolidates
cumulative development since 14 October 2019.
</p>
</div>
</div>
<div id="outline-container-org5f93325" class="outline-2">
<h2 id="org5f93325"><span class="section-number-2">2</span> Installation</h2>
<div class="outline-text-2" id="text-2">
<p>
foam-extend-5.0 can be compiled and runs on a large variety of Linux, Mac or Windows
systems
</p>
<ul class="org-ul">
<li>Main supported OSs:
<ul class="org-ul">
<li>Ubuntu 20.04 LTS</li>
<li>Ubuntu 22.04 LTS</li>
<li>Ubuntu 18.04 LTS</li>
<li>Mac OS X</li>
<li>Microsoft Windows 10</li>
</ul></li>
<li><p>
Compile from source:
</p>
<p>
Please refer to doc/buildInstructions/ for details. Further
installation instruction are available on the unofficial OpenFOAM
Wiki:
<a href="http://openfoamwiki.net/index.php/Installation/Linux/foam-extend-4.1">http://openfoamwiki.net/index.php/Installation/Linux/foam-extend-4.1</a>
If you have improvements or build instructions for a new system,
please share them with the community (see section "How to
contribute", below).
</p></li>
<li><p>
Download binary packages:
</p>
<p>
Binary packages are available for download at
<a href="http://sourceforge.net/projects/foam-extend/">http://sourceforge.net/projects/foam-extend/</a> for the following
systems: Ubuntu 20.04, Ubuntu 22.04, Ubuntu 18.04 and Windows 10
</p></li>
<li>Accompanying ThirdParty software:
<ul class="org-ul">
<li>gcc compatibility up to 11.2</li>
<li>bison 3.8.2</li>
<li>cmake 3.22.1</li>
<li>flex-2.6.4</li>
<li>hwloc 2.0.1</li>
<li>libccmio 2.6.1</li>
<li>mesquite 2.3.0</li>
<li>metis 5.1.0</li>
<li>openmpi 4.1.2</li>
<li>parmetis 4.0.3</li>
<li>ParMGridGen 1.0</li>
<li>PyFoam 0.6.4</li>
<li>scotch 6.0.9</li>
<li>pyFoam 0.6.9</li>
</ul></li>
</ul>
<ul class="org-ul">
<li>The code has been developed on Ubuntu-20.04. It is natively compiled
on Linux, Mac OSX and Microsoft Windows 10.</li>
</ul>
</div>
</div>
<div id="outline-container-org1564cfd" class="outline-2">
<h2 id="org1564cfd"><span class="section-number-2">3</span> Compatibility</h2>
<div class="outline-text-2" id="text-3">
<p>
Upstream features from the OpenFOAM® code base are merged into
foam-extend on regular basis. The interface format of
foam-extend-5.0 is largely compatible to foam-extend-4.1, to
OpenFOAM-1.6-ext and OpenFOAM-1.7.x. In some cases, the
differences are caused by bug fixes and algorithmic improvements,
considered more important than inter-operability.
</p>
</div>
</div>
<div id="outline-container-orge965305" class="outline-2">
<h2 id="orge965305"><span class="section-number-2">4</span> Main differentiators between foam-extend and OpenFOAM</h2>
<div class="outline-text-2" id="text-4">
<p>
A large number of features have been lost within the release of
OpenFOAM since version 1.3, the code base has shrunk by more than
40%. While we understand the lack of technical ability of
supporting advanced CFD features, we feel that existing features and
specifically large-scale contributions should remain active and
developed further. Below is a list of main features of foam-extend
which are lacking, lost, deactivated or unusable in ESI releases:
</p>
<ul class="org-ul">
<li>Turbomachinery features, including General Grid Interface (GGI),
partial overlap GGI, cyclic GGI, with improvements in parallel
scaling. First release of a mixing plane stage interface</li>
<li>Dynamic mesh with topological changes Sliding interfaces, mesh
layering, attach-detach boundaries etc. In foam-extend, full
parallel support for topological changes is released for the first
time</li>
<li>Finite Element Method with support for polyhedral meshes This is
mainly used in mesh deformation and over the last 15 years it has
proven vastly superior to all other dynamic mesh methods.</li>
<li>Advanced mesh deformation technology Including tet FEM mesh
deformation, Radial Basis Function (RBF) mesh deformation,
tetrahedral remeshing dynamic mesh support and solid body motion
functions. All of the above include parallelisation support</li>
<li>Library of dynamic meshes with topological changes with full
second order FVM discretisation support on moving meshes with
topological changes</li>
<li>Internal combustion engine-specific dynamic mesh classes such as
two-stroke engine and various forms of 4-stroke and multi-valve
dynamic mesh classes</li>
<li>Finite Area Method providing support for FVM-like discretisation
on a curved surface in 3-D, with examples of liquid film modeling</li>
<li>Block-coupled matrix support, allowing fully implicit
multi-equation solution of NxN equation sets, with full
parallelisation support. First release of a block-AMG linear
equation solver</li>
<li>Fully implicit conjugate-coupled solution framework, allowing
implicit solution for multiple equations over multiple meshes, with
parallelism</li>
<li>Proper Orthogonal Decomposition data analysis tools, with
applications to FOAM field classes</li>
<li>Equation reader classes and tutorials</li>
<li>Multi-solver solution framework, allowing multiple field models to
be solved in a coupled manner</li>
<li>A major contribution is solid mechanics modelling, including
linear and non-linear materials, contact, self-contact and
friction, with updated Lagrangian or absolute Lagrangian
formulation. Solution of damage models and crack propagation in
complex materials via topological changes</li>
<li>CUDA solver release, provided in full source and as an example of
coupling external linear equation solvers with FOAM</li>
<li>Library-level support for Immersed Boundary Method and Overset
Mesh</li>
<li>Framework for Reduced Order Models using Proper Orthogonal Decomposition
(POD) for real-time simulations based on the method of snapshots</li>
<li>Major improvements in accuracy and stability of FVM discretisation
with options on convection and diffusion discretisation, deferred
correction or explicit schemes</li>
<li>Algebraic multigrid solver framework for scalar and block matrices</li>
<li>274 tutorials with automated run scripts</li>
<li>Automatic test harness</li>
<li>Approximately 6800 bug fixes in fundamental level libraries and
discretisation techniques</li>
</ul>
</div>
</div>
<div id="outline-container-org58de222" class="outline-2">
<h2 id="org58de222"><span class="section-number-2">5</span> New features in foam-extend-5.0, since foam-extend-4.1</h2>
<div class="outline-text-2" id="text-5">
<p>
The list of features is a result of the work of numerous
contributors. The maintainers of foam-extend would formally like to
thank them all.
</p>
<p>
Get a full log of the updates by (either):
</p>
<div class="org-src-container">
<pre class="src src-bash">user@machine> git log 5.0.. > commitLog
</pre>
</div>
<div class="org-src-container">
<pre class="src src-bash">user@machine> git log 5.0.. --oneline > commitLog
</pre>
</div>
<div class="org-src-container">
<pre class="src src-bash">user@machine> gitg 5.0..
</pre>
</div>
</div>
</div>
<div id="outline-container-orgda5bb1e" class="outline-2">
<h2 id="orgda5bb1e"><span class="section-number-2">6</span> Major new features:</h2>
<div class="outline-text-2" id="text-6">
<ul class="org-ul">
<li>Physics modelling
<ul class="org-ul">
<li>Proper Orthogonal Decomposition (POD) model development across a number of applications with tutorials and validation cases. POD uses the Method of Snapshots to create energy-consistent reduced order models which run 1000s of times faster than full CFD. POD analysis is also used to examine stability characteristics of flow regimes or to assemble "digital twin"-type models. POD has been deployed across a number of applications, with new tutorials.</li>
<li>Extension to porous zone models for thermal modelling and heat transfer, including implicit coupled conjugate heat transfer</li>
<li>Physics modelling updates for coal combustion</li>
<li>Handling of derived forms of enthalpy in thermophysical models with correct boundary condition setup (coupled interfaces)</li>
</ul></li>
</ul>
<ul class="org-ul">
<li>Numerics
<ul class="org-ul">
<li>Immersed Boundary (Surface) method: major improvements. Consistency errors in parallel cutting and interaction with coupled boundaries have been resolved. Further type-consistent boundary conditions on IB surfaces have been adeed, with correct mapping and post-processing. Major robustness improvements in the method. Algorithmic improvements in immersed boundary handling; cutting, dead cells, extended sets of boundary conditions. Rewrite of cut cell handling, parallelism and consistency updates.</li>
<li>Immersed boundary with interfering patches: multiple intersections</li>
<li>Updated algorithms for buoyant flows: correct limit of incompressibility and consistent handling of stratified flows. Solvers represent incompressible results for canonical flows without instability</li>
<li>Consistency updates for Multiple Rotating Frames (MRF) of reference, with accurate geometry handling. Consistent and convergent integration with block pressure-velocity solvers</li>
<li>Algorithmic updates for steady compressible turbomachinery flows. New implementation of rothalpy handling with better consistency in rothalpy jump coupled boundary conditions</li>
<li>Use of block-AMG solvers for block-coupled p-U solvers: see tutorials</li>
<li>Updated handling of bounded flux boundary conditions</li>
<li>New 01 bounded convection schemes</li>
<li>Better reporting of flux check</li>
<li>Updated algorithms for partial overlap GGI interface pairs</li>
<li>Change in handling of adjustPhi for moving deforming meshes</li>
</ul></li>
</ul>
<ul class="org-ul">
<li>HPC and parallelism, performance improvements
<ul class="org-ul">
<li>Major improvement in handling of processor boundaries and other cached coupled interface patch types. This resolves long-standing bugs in FOAM-OpenFOAM development lines and results in significant reduction in number of iterations of linear solvers. Further, numerous stability and consistency problems in parallel execution have been resolved</li>
<li>Improvements for large memory usage in large-scale HPC cases</li>
<li>Incremental consistency work on block-coupled solvers for incompressible flows</li>
<li>Incremental improvement in performance for parallel Oveset Mesh capability. Update in low-level communication and consistency</li>
<li>Clean-up of boundary condition updates in absence of database field access</li>
</ul></li>
</ul>
<ul class="org-ul">
<li>Dynamic Mesh
<ul class="org-ul">
<li>Full deployment of dynamic load balancing with AMR or other dynamic mesh features at the level of topoChangerDynamicFvMesh</li>
<li>Refactoring of dynamic mesh solvers with algoritmic efficiency improvements</li>
<li>Changes in dynamic mesh handling: efficient and consistent geometry updates</li>
</ul></li>
</ul>
</div>
</div>
<div id="outline-container-orgc6c30d8" class="outline-2">
<h2 id="orgc6c30d8"><span class="section-number-2">7</span> Software engineering</h2>
<div class="outline-text-2" id="text-7">
<ul class="org-ul">
<li>Port to gcc-9 and gcc-11</li>
<li>c++-11 updates: default destructors, delete automatically generated</li>
<li>update of the build system using native third party packages whenever possible</li>
<li>Change in style to FatalErrorInFunction sytnax</li>
<li>new VectorN types for extended coupling in block matrices</li>
</ul>
</div>
</div>
<div id="outline-container-org804948d" class="outline-2">
<h2 id="org804948d"><span class="section-number-2">8</span> Consistency with previous version</h2>
<div class="outline-text-2" id="text-8">
<ul class="org-ul">
<li>fvSolution requires correct PIMPLE/SIMPLE sub-dictionaries; use of potentialFlow sub-dictionary in initialisation</li>
<li>blockMeshDict moved into system</li>
<li>faceCompactList consistency with OpenCFD version</li>
</ul>
</div>
</div>
<div id="outline-container-org7d3852e" class="outline-2">
<h2 id="org7d3852e"><span class="section-number-2">9</span> Overview of Development</h2>
<div class="outline-text-2" id="text-9">
<ul class="org-ul">
<li>New tutorials: 274 in total</li>
<li>Bug fixes: see git log for details</li>
<li>In total, the release consists of 5535 commits since the last release</li>
</ul>
</div>
</div>
<div id="outline-container-orgd5f40f4" class="outline-2">
<h2 id="orgd5f40f4"><span class="section-number-2">10</span> Reporting bugs</h2>
<div class="outline-text-2" id="text-10">
<p>
To report bugs, please use the bugtracker at
<a href="http://sourceforge.net/p/foam-extend/tickets/">http://sourceforge.net/p/foam-extend/tickets/</a>
</p>
</div>
</div>
<div id="outline-container-org99c69c6" class="outline-2">
<h2 id="org99c69c6"><span class="section-number-2">11</span> How to contribute</h2>
<div class="outline-text-2" id="text-11">
<p>
All your contributions are highly welcome: New solvers, utilities and
models; bug fixes; documentation. The many ways of contributing and the
contribution process are described in detail at:
<a href="http://sourceforge.net/p/foam-extend/wiki/HowToContribute/">http://sourceforge.net/p/foam-extend/wiki/HowToContribute/</a>
</p>
</div>
</div>
<div id="outline-container-org2b35aaf" class="outline-2">
<h2 id="org2b35aaf"><span class="section-number-2">12</span> List of Contributors:</h2>
<div class="outline-text-2" id="text-12">
<p>
See file ListOfContributors
</p>
</div>
</div>
</div>
<div id="postamble" class="status">
<p class="date">Date: September 2022</p>
<p class="date">Created: 2022-09-20 Tue 09:35</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div>
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