Initial commit

Allwmake

+#!/bin/sh
+# Run from OPENFOAM top-level directory only
+cd "${0%/*}" || exit
+wmake -check-dir "$WM_PROJECT_DIR" 2>/dev/null || {
+    echo "Error (${0##*/}) : not located in \$WM_PROJECT_DIR"
+    echo "    Check your OpenFOAM environment and installation"
+    exit 1
+}
+if [ -f "$WM_PROJECT_DIR"/wmake/scripts/AllwmakeParseArguments ]
+then  . "$WM_PROJECT_DIR"/wmake/scripts/AllwmakeParseArguments || \
+    echo "Argument parse error"
+else
+    echo "Error (${0##*/}) : WM_PROJECT_DIR appears to be incorrect"
+    echo "    Check your OpenFOAM environment and installation"
+    exit 1
+fi
+
+#------------------------------------------------------------------------------
+# Preamble. Report tools or at least the mpirun location
+if [ -f "$WM_PROJECT_DIR"/wmake/scripts/list_tools ]
+then sh "$WM_PROJECT_DIR"/wmake/scripts/list_tools || true
+else
+    echo "mpirun=$(command -v mpirun || true)"
+fi
+echo
+# Report compiler information. First non-blank line from --version output
+compiler="$(wmake -show-path-cxx 2>/dev/null || true)"
+if [ -x "$compiler" ]
+then
+    echo "compiler=$compiler"
+    "$compiler" --version 2>/dev/null | sed -e '/^$/d;q'
+else
+    echo "compiler=unknown"
+fi
+
+echo
+echo ========================================
+date "+%Y-%m-%d %H:%M:%S %z" 2>/dev/null || echo "date is unknown"
+echo "Starting compile ${WM_PROJECT_DIR##*/} ${0##*/}"
+echo "  $WM_COMPILER ${WM_COMPILER_TYPE:-system} compiler"
+echo "  ${WM_OPTIONS}, with ${WM_MPLIB} ${FOAM_MPI}"
+echo ========================================
+echo
+
+# Compile tools for wmake
+"${WM_DIR:-wmake}"/src/Allmake
+
+# Compile ThirdParty libraries and applications
+if [ -d "$WM_THIRD_PARTY_DIR" ]
+then
+    if [ -e "$WM_THIRD_PARTY_DIR"/Allwmake.override ]
+    then
+        if [ -x "$WM_THIRD_PARTY_DIR"/Allwmake.override ]
+        then    "$WM_THIRD_PARTY_DIR"/Allwmake.override
+        fi
+    elif [ -x "$WM_THIRD_PARTY_DIR"/Allwmake ]
+    then      "$WM_THIRD_PARTY_DIR"/Allwmake
+    else
+        echo "Skip ThirdParty (no Allwmake* files)"
+    fi
+else
+    echo "Skip ThirdParty (no directory)"
+fi
+
+# OpenFOAM libraries
+src/Allwmake $targetType $*
+
+# Additional components/modules
+case "$FOAM_MODULE_PREFIX" in
+(false | none)
+    echo ========================================
+    echo "OpenFOAM modules disabled (prefix=${FOAM_MODULE_PREFIX})"
+    echo
+    ;;
+(*)
+    # Use wmake -all instead of Allwmake to allow for overrides
+    ( cd "$WM_PROJECT_DIR/modules" 2>/dev/null && wmake -all )
+esac
+
+# Count files in given directory. Ignore "Test-*" binaries.
+_foamCountDirEntries()
+{
+    (cd "$1" 2>/dev/null && find . -mindepth 1 -maxdepth 1 -type f 2>/dev/null) |\
+        sed -e '\@/Test-@d' | wc -l
+}
+
+src/transportModels-GPU/Allwmake $targetType $*
+src/TurbulenceModels-GPU/Allwmake $targetType $*
+
+# OpenFOAM applications
+applications/Allwmake $targetType $*
+
+# Some summary information
+echo
+date "+%Y-%m-%d %H:%M:%S %z" 2>/dev/null || echo "date is unknown"
+echo ========================================
+echo "  ${WM_PROJECT_DIR##*/}"
+echo "  $WM_COMPILER ${WM_COMPILER_TYPE:-system} compiler"
+echo "  ${WM_OPTIONS}, with ${WM_MPLIB} ${FOAM_MPI}"
+echo
+echo "  api   = $(etc/openfoam -show-api 2>/dev/null)"
+echo "  patch = $(etc/openfoam -show-patch 2>/dev/null)"
+echo "  bin   = $(_foamCountDirEntries "$FOAM_APPBIN") entries"
+echo "  lib   = $(_foamCountDirEntries "$FOAM_LIBBIN") entries"
+echo
+echo ========================================
+
+#------------------------------------------------------------------------------

CONTRIBUTORS.md

+# Contributors to OpenFOAM
+
+The following is a list of known contributors to OpenFOAM.
+It is likely incomplete...
+
+## Contributors (alphabetical by surname)
+
+- William Bainbridge
+- Gabriel Barajas
+- Kutalmis Bercin
+- Ivor Clifford
+- Greg Collecutt
+- Jonathan Cranford
+- Sergio Ferraris
+- Matej Forman
+- Marian Fuchs
+- Pawan Ghildiyal
+- Chris Greenshields
+- Bernhard Gschaider
+- Andrew Heather
+- David Hill
+- Mattijs Janssens
+- Andrew Jackson
+- Hrvoje Jasak
+- Alexander Kabat vel Job
+- Thilo Knacke
+- Shannon Leakey
+- Tommaso Lucchini
+- Graham Macpherson
+- Alexey Matveichev
+- Karl Meredith
+- Laurence McGlashan
+- Timo Niemi
+- Haakan Nilsson
+- Niklas Nordin
+- Mark Olesen
+- Victor Olesen
+- Evangelos Papoutsis-Kiachagias
+- Juho Peltola
+- Johan Roenby
+- Henrik Rusche
+- Bruno Santos
+- Henning Scheufler
+- Richard Smith
+- Prashant Sonakar
+- Hilary Spencer
+- Gavin Tabor
+- Zeljko Tukovic
+- Eugene De Villiers
+- Yi Wang
+- Norbert Weber
+- Henry Weller
+- Niklas Wikstrom
+- Guanyang Xue
+- Thorsten Zirwes
+
+<!----------------------------------------------------------------------------->

META-INFO/.gitignore

+# Do not track build information
+build-info
+
+# Do not track time-stamp
+time-stamp
+
+# Do not track any manifest files
+*[Mm]anifest.txt
+
+####

META-INFO/README.md

+## META-INFO
+
+Meta-information is generally for OpenFOAM internal use only.
+
+The format, content and meaning may be changed at anytime without
+prior notice.
+If any of these are changed, these are some of places that will need
+to be updated accordingly:
+
+  - bin/foamEtcFile
+  - bin/tools/foamConfigurePaths
+  - bin/tools/foamPackRelease
+  - etc/openfoam
+  - wmake/scripts/wmake-build-info
+
+### api-info
+
+This file and its contents are to be tracked by git.
+
+- File content (api) generated by `wmake -build-info` from the
+  `OPENFOAM` define in `wmake/rules/General/general`
+- File content (patch) is manually generated content.
+
+
+### build-info
+
+This file is ***never*** to be tracked by git, but may be present in
+shipped source archives.
+
+- File content (branch, build) generated by `wmake -build-info` from
+  git information and cached from previous wmake (api)
+
+
+### Content types
+
+#### api
+
+Format: `date +%y%m`
+
+- 4-digit year-month (YYMM) integer corresponding to the major
+  release or in unusual cases an intermediate release.
+  Example, `2106` for the June-2021 release.
+
+
+#### patch
+
+Format: `date +%y%m%d`
+
+- 6-digit year-month-day (YYMMDD) integer corresponding to a patch-level
+  for the given **released** API.
+- The first release can have a patch value of `0` or `1` which
+  indicates that it is unpatched or just released. Alternatively
+  it can have a patch value corresponding to the release date.
+
+The patch value is only meaningful together with the api value.
+However, for *development* branches, the patch level should not be
+ascribed too much meaning, but will often correspond to the last
+merge with a *maintenance* (*eg*, `master`) branch.
+
+
+### Flow of information
+
+Changes in the build information must be reflected in information
+available in the final binaries. Conversely, it is necessary for later
+distributions to have a record of the same information.
+
+| property  | source                    | saved      |
+|-----------|---------------------------|------------|
+| api       | wmake/rules               | api-info   |
+| patch     | manual (api-info)         | build-info |
+| branch    | git                       | build-info |
+| build     | git                       | build-info |
+
+
+The command `wmake -build-info -check` is used to determine if
+the saved information needs synchronization. The command
+`wmake -build-info -update` performs the synchronization.
+
+
+### Notes
+
+The saved information is split into two separate files.
+The `api-info` file contains more permanent information,
+whereas the `build-info` is more transient in nature.
+
+----
+2021-06-09

META-INFO/api-info

+api=2112
+patch=0

README.md

+## About OpenFOAM
+OpenFOAM is a free, open source CFD software [released and developed by OpenCFD Ltd since 2004](http://www.openfoam.com/history/).
+It has a large user base across most areas of engineering and science, from both commercial and academic organisations.
+OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to acoustics, solid mechanics and electromagnetics.
+[See documentation](http://www.openfoam.com/documentation)
+
+OpenFOAM is professionally released every six months to include
+customer sponsored developments and contributions from the community -
+individual and group contributors, integrations
+(eg, from FOAM-extend and OpenFOAM Foundation Ltd) as well as
+[governance guided activities](https://www.openfoam.com/governance/).
+
+
+## License
+
+OpenFOAM is free software: you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation, either version 3 of the License, or (at your
+option) any later version.  See the file COPYING in this directory or
+[http://www.gnu.org/licenses/](http://www.gnu.org/licenses), for a
+description of the GNU General Public License terms under which you
+may redistribute files.
+
+
+## OpenFOAM Trademark
+
+OpenCFD Ltd grants use of its OpenFOAM trademark by Third Parties on a
+licence basis. ESI Group and OpenFOAM Foundation Ltd are currently
+permitted to use the Name and agreed Domain Name. For information on
+trademark use, please refer to the
+[trademark policy guidelines][link trademark].
+
+Please [contact OpenCFD](http://www.openfoam.com/contact) if you have
+any questions about the use of the OpenFOAM trademark.
+
+Violations of the Trademark are monitored, and will be duly prosecuted.
+
+
+## Using OpenFOAM
+
+If OpenFOAM has already been compiled on your system, simply source
+the appropriate `etc/bashrc` or `etc/cshrc` file and get started.
+For example, for the OpenFOAM-v2112 version:
+```
+source /installation/path/OpenFOAM-v2112/etc/bashrc
+```
+
+## Compiling OpenFOAM
+
+If you are compiling OpenFOAM from source, please see the relevant
+guides:
+
+| Location    | Readme    | Requirements | Build |
+|-------------|-----------|--------------|-------|
+| [OpenFOAM][repo openfoam] | [readme][link openfoam-readme] | [system requirements][link openfoam-require] | [build][link openfoam-build] |
+| [ThirdParty][repo third] | [readme][link third-readme] | [system requirements][link third-require] | [build][link third-build] |
+
+
+If you need to modify the versions or locations of ThirdParty
+software, please read how the
+[OpenFOAM configuration][wiki-config] is structured.
+
+
+## How do I know which version I am currently using?
+
+The value of the `$WM_PROJECT_DIR` or even `$WM_PROJECT_VERSION` are
+not guaranteed to have any correspondence to the OpenFOAM release
+(API) value. If OpenFOAM has already been compiled, the build-time
+information is embedded into each application. For example, as
+displayed from `blockMesh -help`:
+```
+Using: OpenFOAM-com (2012) - visit www.openfoam.com
+Build: b830beb5ea-20210429 (patch=210414)
+Arch:  LSB;label=32;scalar=64
+```
+This output contains all of the more interesting information that we need:
+
+| item                  | value         |
+|-----------------------|---------------|
+| version               | com  (eg, local development branch) |
+| api                   | 2012          |
+| commit                | b830beb5ea    |
+| author date           | 20210429      |
+| patch-level           | (20)210414    |
+| label/scalar size     | 32/64 bits    |
+
+The Arch information may also include the `solveScalar` size
+if different than the `scalar` size.
+
+As can be seen in this example, the git build information is
+supplemented by the date when the last change was authored, which can
+be helpful when the repository contains local changes. If you simply
+wish to know the current API and patch levels directly, the
+`wmake -build-info` provides the relevant information even
+when OpenFOAM has not yet been compiled:
+```
+$ wmake -build-info
+make
+    api = 2012
+    patch = 210414
+    branch = master
+    build = 308af39136-20210426
+```
+Similar information is available with `foamEtcFile`, using the
+`-show-api` or `-show-patch` options. For example,
+```
+$ foamEtcFile -show-api
+2012
+
+$ foamEtcFile -show-patch
+210414
+```
+This output will generally be the easiest to parse for scripts.
+The `$FOAM_API` convenience environment variable may not reflect the
+patching changes made within the currently active environment and
+should be used with caution.
+
+
+## ThirdParty directory
+
+OpenFOAM normally ships with a directory of 3rd-party software and
+build scripts for some 3rd-party software that is either necessary or
+at least highly useful for OpenFOAM, but which are not necessarily
+readily available on every operating system or cluster installation.
+
+These 3rd-party sources are normally located in a directory parallel
+to the OpenFOAM directory. For example,
+```
+/path/parent
+|-- OpenFOAM-v2112
+\-- ThirdParty-v2112
+```
+There are, however, many cases where this simple convention is inadequate:
+
+* When no additional 3rd party software is actually required (ie, the
+  operating system or cluster installation provides it)
+
+* When we have changed the OpenFOAM directory name to some arbitrary
+  directory name, e.g. openfoam-sandbox2112, etc..
+
+* When we would like any additional 3rd party software to be located
+  inside of the OpenFOAM directory to ensure that the installation is
+  encapsulated within a single directory structure. This can be
+  necessary for cluster installations, or may simply be a convenient
+  means of performing a software rollout for individual workstations.
+
+* When we have many different OpenFOAM directories for testing or
+  developing various different features but wish to use or reuse the
+  same 3rd party software for them all.
+
+The solution for these problems is a newer, more intelligent discovery
+when locating the ThirdParty directory with the following precedence:
+
+1. PROJECT/ThirdParty
+   * for single-directory installations
+2. PREFIX/ThirdParty-VERSION
+   * this corresponds to the traditional approach
+3. PREFIX/ThirdParty-vAPI
+   * allows for an updated value of VERSION, *eg*, `v2112-myCustom`,
+     without requiring a renamed ThirdParty. The API value would still
+     be `2112` and the original `ThirdParty-v2112/` would be found.
+4. PREFIX/ThirdParty-API
+   * same as the previous example, but using an unadorned API value.
+5. PREFIX/ThirdParty-common
+   * permits maximum reuse for various versions, for experienced
+     users who are aware of potential version incompatibilities
+
+If none of these directories are found to be suitable, it reverts to
+using PROJECT/ThirdParty as a dummy location (even if the directory
+does not exist). This is a safe fallback value since it is within the
+OpenFOAM directory structure and can be trusted to have no negative
+side-effects. In the above, the following notation has been used:
+
+| name          | value         | meaning       |
+|---------------|---------------|---------------|
+| PROJECT       | `$WM_PROJECT_DIR`     | The OpenFOAM directory |
+| PREFIX        | `dirname $WM_PROJECT_DIR` | The OpenFOAM parent directory |
+| API           | `foamEtcFiles -show-api` |  The api or release version |
+| VERSION       | `$WM_PROJECT_VERSION` | The version we have chosen |
+
+To reduce the potential of false positive matches (perhaps some other
+software also uses ThirdParty-xxx for its naming), the directory test
+is accompanied by a OpenFOAM-specific sanity test. The OpenFOAM
+ThirdParty directory will contain either an `Allwmake` file or a
+`platforms/` directory.
+
+
+<!-- OpenFOAM -->
+
+[link trademark]: https://www.openfoam.com/opencfd-limited-trade-mark-policy
+
+[repo openfoam]: https://develop.openfoam.com/Development/openfoam/
+[repo third]: https://develop.openfoam.com/Development/ThirdParty-common/
+
+[link openfoam-readme]: https://develop.openfoam.com/Development/openfoam/blob/develop/README.md
+[link openfoam-issues]: https://develop.openfoam.com/Development/openfoam/blob/develop/doc/BuildIssues.md
+[link openfoam-build]: https://develop.openfoam.com/Development/openfoam/blob/develop/doc/Build.md
+[link openfoam-require]: https://develop.openfoam.com/Development/openfoam/blob/develop/doc/Requirements.md
+[link third-readme]: https://develop.openfoam.com/Development/ThirdParty-common/blob/develop/README.md
+[link third-build]: https://develop.openfoam.com/Development/ThirdParty-common/blob/develop/BUILD.md
+[link third-require]: https://develop.openfoam.com/Development/ThirdParty-common/blob/develop/Requirements.md
+
+[wiki-config]: https://develop.openfoam.com/Development/openfoam/-/wikis/configuring
+
+
+## Useful Links
+
+- Download [source](https://dl.openfoam.com/source/) and [download and installation instructions](http://www.openfoam.com/download/)
+- [Documentation](http://www.openfoam.com/documentation)
+- [Reporting bugs/issues/feature requests](http://www.openfoam.com/code/bug-reporting.php)
+- [Issue tracker](https://develop.openfoam.com/Development/openfoam/-/issues)
+- [Code wiki](https://develop.openfoam.com/Development/openfoam/-/wikis/) and [General wiki](http://wiki.openfoam.com/)
+- [Governance](http://www.openfoam.com/governance/), [Governance Projects](https://www.openfoam.com/governance/projects)
+- [Contacting OpenCFD](http://www.openfoam.com/contact/)
+
+Copyright 2016-2021 OpenCFD Ltd

applications/Allwmake

+#!/bin/sh
+# Run from OPENFOAM applications/ directory only
+cd "${0%/*}" || exit
+wmake -check-dir "$WM_PROJECT_DIR/applications" 2>/dev/null || {
+    echo "Error (${0##*/}) : not located in \$WM_PROJECT_DIR/applications"
+    echo "    Check your OpenFOAM environment and installation"
+    exit 1
+}
+if [ -f "$WM_PROJECT_DIR"/wmake/scripts/AllwmakeParseArguments ]
+then  . "$WM_PROJECT_DIR"/wmake/scripts/AllwmakeParseArguments || \
+    echo "Argument parse error"
+else
+    echo "Error (${0##*/}) : WM_PROJECT_DIR appears to be incorrect"
+    echo "    Check your OpenFOAM environment and installation"
+    exit 1
+fi
+
+echo ========================================
+echo Compile OpenFOAM applications
+echo ========================================
+
+#------------------------------------------------------------------------------
+
+wmake -all $targetType solvers
+wmake -all $targetType utilities
+
+# Optional
+## wmake -all $targetType tools
+
+#------------------------------------------------------------------------------
+
+echo ========================================
+echo Done OpenFOAM applications
+echo ========================================
+
+#------------------------------------------------------------------------------

applications/solvers/DNS/DNSSolversDoc.H

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2015 OpenFOAM Foundation
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+    details.
+
+    You should have received a copy of the GNU General Public License along with
+    OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\defgroup grpDNSSolvers Direct Numerical Simulation solvers
+@{
+    \ingroup grpSolvers
+    This group contains Direct Numerical Simulation (DNS) solvers.
+@}
+
+\*---------------------------------------------------------------------------*/

applications/solvers/DNS/dnsFoam/Allwmake

+#!/bin/sh
+cd "${0%/*}" || exit                                # Run from this directory
+. ${WM_PROJECT_DIR:?}/wmake/scripts/AllwmakeParseArguments
+. ${WM_PROJECT_DIR:?}/wmake/scripts/have_fftw
+#------------------------------------------------------------------------------
+
+if have_fftw
+then
+    wmake $targetType
+else
+    echo "==> skip dnsFoam solver (no FFTW)"
+fi
+
+#------------------------------------------------------------------------------

applications/solvers/DNS/dnsFoam/Make/files

+dnsFoam.C
+
+EXE = $(FOAM_APPBIN)/dnsFoam

applications/solvers/DNS/dnsFoam/Make/options

+EXE_INC = \
+    -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/randomProcesses/lnInclude
+
+EXE_LIBS = \
+    -lfiniteVolume \
+    -lmeshTools \
+    -lrandomProcesses

applications/solvers/DNS/dnsFoam/createFields.H

+#include "readTransportProperties.H"
+
+Info<< "Reading field p\n" << endl;
+volScalarField p
+(
+    IOobject
+    (
+        "p",
+        runTime.timeName(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::AUTO_WRITE
+    ),
+    mesh
+);
+
+Info<< "Reading field U\n" << endl;
+volVectorField U
+(
+    IOobject
+    (
+        "U",
+        runTime.timeName(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::AUTO_WRITE
+    ),
+    mesh
+);
+
+#include "createPhi.H"
+
+mesh.setFluxRequired(p.name());
+
+#include "readTurbulenceProperties.H"

applications/solvers/DNS/dnsFoam/dnsFoam.C

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2011-2016 OpenFOAM Foundation
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Application
+    dnsFoam
+
+Group
+    grpDNSSolvers
+
+Description
+    Direct numerical simulation solver for boxes of isotropic turbulence.
+
+\*---------------------------------------------------------------------------*/
+
+#include "fvCFD.H"
+#include "Kmesh.H"
+#include "UOprocess.H"
+#include "fft.H"
+#include "calcEk.H"
+#include "graph.H"
+#include "pisoControl.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+int main(int argc, char *argv[])
+{
+    argList::addNote
+    (
+        "Direct numerical simulation for boxes of isotropic turbulence."
+    );
+
+    #include "postProcess.H"
+
+    #include "setRootCaseLists.H"
+    #include "createTime.H"
+    #include "createMeshNoClear.H"
+    #include "createControl.H"
+    #include "createFields.H"
+    #include "initContinuityErrs.H"
+
+    // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+    label ntot = 1;
+    forAll(K.nn(), idim)
+    {
+        ntot *= K.nn()[idim];
+    }
+    const scalar recRootN = 1.0/Foam::sqrt(scalar(ntot));
+
+    Info<< nl << "Starting time loop" << endl;
+
+    while (runTime.loop())
+    {
+        Info<< "Time = " << runTime.timeName() << nl << endl;
+
+        force.primitiveFieldRef() = ReImSum
+        (
+            fft::reverseTransform
+            (
+                K/(mag(K) + 1.0e-6) ^ forceGen.newField(), K.nn()
+            )*recRootN
+        );
+
+        #include "globalProperties.H"
+
+        fvVectorMatrix UEqn
+        (
+            fvm::ddt(U)
+          + fvm::div(phi, U)
+          - fvm::laplacian(nu, U)
+         ==
+            force
+        );
+
+        solve(UEqn == -fvc::grad(p));
+
+
+        // --- PISO loop
+        while (piso.correct())
+        {
+            volScalarField rAU(1.0/UEqn.A());
+            surfaceScalarField rAUf("rAUf", fvc::interpolate(rAU));
+            volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p));
+            surfaceScalarField phiHbyA
+            (
+                "phiHbyA",
+                fvc::flux(HbyA)
+              + rAUf*fvc::ddtCorr(U, phi)
+            );
+
+            // Update the pressure BCs to ensure flux consistency
+            constrainPressure(p, U, phiHbyA, rAUf);
+
+            fvScalarMatrix pEqn
+            (
+                fvm::laplacian(rAUf, p) == fvc::div(phiHbyA)
+            );
+
+            pEqn.solve(mesh.solver(p.select(piso.finalInnerIter())));
+
+            phi = phiHbyA - pEqn.flux();
+
+            #include "continuityErrs.H"
+
+            U = HbyA - rAU*fvc::grad(p);
+            U.correctBoundaryConditions();
+        }
+
+        runTime.write();
+
+        if (runTime.writeTime())
+        {
+            calcEk(U, K).write
+            (
+                runTime.path()/"graphs"/runTime.timeName(),
+                "Ek",
+                runTime.graphFormat()
+            );
+        }
+
+        runTime.printExecutionTime(Info);
+    }
+
+    Info<< "End\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //

applications/solvers/DNS/dnsFoam/globalProperties.H

+{
+    Info<< "k(" << runTime.timeName() << ") = "
+        << 3.0/2.0*average(magSqr(U)).value() << endl;
+
+    Info<< "epsilon(" << runTime.timeName() << ") = "
+        << (0.5*nu*average(magSqr(twoSymm(fvc::grad(U))))).value() << endl;
+
+    Info<< "U.f(" << runTime.timeName() << ") = "
+        << 181.0*average(U & force).value() << endl;
+}

applications/solvers/DNS/dnsFoam/readTransportProperties.H

+    Info<< "Reading transportProperties\n" << endl;
+
+    IOdictionary transportProperties
+    (
+        IOobject
+        (
+            "transportProperties",
+            runTime.constant(),
+            mesh,
+            IOobject::MUST_READ_IF_MODIFIED,
+            IOobject::NO_WRITE
+        )
+    );
+
+    dimensionedScalar nu
+    (
+        "nu",
+        dimViscosity,
+        transportProperties
+    );

applications/solvers/DNS/dnsFoam/readTurbulenceProperties.H

+    Info<< "Reading turbulenceProperties\n" << endl;
+
+    IOdictionary turbulenceProperties
+    (
+        IOobject
+        (
+            "turbulenceProperties",
+            runTime.constant(),
+            mesh,
+            IOobject::MUST_READ_IF_MODIFIED,
+            IOobject::NO_WRITE
+        )
+    );
+
+    volVectorField force
+    (
+        U/dimensionedScalar("dt", dimTime, runTime.deltaTValue())
+    );
+
+    Kmesh K(mesh);
+    UOprocess forceGen(K, runTime.deltaTValue(), turbulenceProperties);

applications/solvers/acoustic/acousticFoam/Make/files

+acousticFoam.C
+
+EXE = $(FOAM_APPBIN)/acousticFoam

applications/solvers/acoustic/acousticFoam/Make/options

+EXE_INC = \
+    -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/fvOption/lnInclude \
+    -I$(LIB_SRC)/regionFaModels/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/sampling/lnInclude \
+    -I$(LIB_SRC)/transportModels/compressible/lnInclude
+
+EXE_LIBS = \
+    -lfiniteVolume \
+    -lfvOptions \
+    -lmeshTools \
+    -lsampling \
+    -lregionFaModels

applications/solvers/acoustic/acousticFoam/acousticFoam.C

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Application
+   acousticFoam
+
+Group
+    grpAcousticSolvers
+
+Description
+    Acoustic solver solving the acoustic pressure wave equation.
+
+    \f[
+        \ddt2{pa} - c^2 \laplacian{pa} = 0
+    \f]
+
+    where
+    \vartable
+        c       | Sound speed
+        pa      | Acoustic pressure
+    \endvartable
+
+SourceFiles
+    acousticFoam.C
+
+\*---------------------------------------------------------------------------*/
+
+#include "fvCFD.H"
+#include "fvOptions.H"
+#include "pimpleControl.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+int main(int argc, char *argv[])
+{
+    argList::addNote
+    (
+        "Acoustic solver solving the acoustic pressure wave equation."
+    );
+
+    #include "postProcess.H"
+
+    #include "addCheckCaseOptions.H"
+    #include "setRootCaseLists.H"
+    #include "createTime.H"
+    #include "createMesh.H"
+    #include "createControl.H"
+    #include "createRegionControls.H"
+
+    #include "readTransportProperties.H"
+    #include "createFields.H"
+
+    Info<< "\nStarting time loop\n" << endl;
+
+    while (runTime.run())
+    {
+        ++runTime;
+
+        Info<< "Time = " << runTime.timeName() << nl << endl;
+
+        while (pimple.correct())
+        {
+            #include "paEqn.H"
+        }
+
+        runTime.write();
+
+        runTime.printExecutionTime(Info);
+    }
+
+    Info<< "End\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //