INT: Integration of isoAdvector and supporting material

Community contribution from Johan Roenby, DHI

IsoAdvector is a geometric Volume-of-Fluid method for advection of a
sharp interface between two incompressible fluids. It works on both
structured and unstructured meshes with no requirements on cell shapes.
IsoAdvector is as an alternative choice for the interface compression
treatment with the MULES limiter implemented in the interFoam family
of solvers.

The isoAdvector concept and code was developed at DHI and was funded
by a Sapere Aude postdoc grant to Johan Roenby from The Danish Council
for Independent Research | Technology and Production Sciences (Grant-ID:
DFF - 1337-00118B - FTP).
Co-funding is also provided by the GTS grant to DHI from the Danish
Agency for Science, Technology and Innovation.

The ideas behind and performance of the isoAdvector scheme is
documented in:

    Roenby J, Bredmose H, Jasak H. 2016 A computational method for sharp
    interface  advection. R. Soc. open sci. 3: 160405.
    [http://dx.doi.org/10.1098/rsos.160405](http://dx.doi.org/10.1098/rsos.160405)

Videos showing isoAdvector's performance with a number of standard
test cases can be found in this youtube channel:

    https://www.youtube.com/channel/UCt6Idpv4C8TTgz1iUX0prAA

Project contributors:

* Johan Roenby <jro@dhigroup.com> (Inventor and main developer)
* Hrvoje Jasak <hrvoje.jasak@fsb.hr> (Consistent treatment of
  boundary faces including processor boundaries, parallelisation,
  code clean up
* Henrik Bredmose <hbre@dtu.dk> (Assisted in the conceptual
  development)
* Vuko Vukcevic <vuko.vukcevic@fsb.hr> (Code review, profiling,
  porting to foam-extend, bug fixing, testing)
* Tomislav Maric <tomislav@sourceflux.de> (Source file
  rearrangement)
* Andy Heather <a.heather@opencfd.co.uk> (Integration into OpenFOAM
  for v1706 release)

See the integration repository below to see the full set of changes
implemented for release into OpenFOAM v1706

    https://develop.openfoam.com/Community/Integration-isoAdvector

tutorials/multiphase/interIsoFoam/sphereInReversedVortexFlow/system/fvSolution

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    "alpha.*"
+    {
+        isoFaceTol      1e-8;
+        surfCellTol     1e-8;
+        snapTol         0;
+        nAlphaBounds    4;
+        clip            false;
+        nAlphaSubCycles 1;
+        cAlpha          1;
+    }
+}
+
+PIMPLE
+{
+    frozenFlow      yes;
+    momentumPredictor no;
+    nCorrectors     -1;
+    nNonOrthogonalCorrectors -1;
+    pRefCell        0;
+    pRefValue       0;
+}
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/sphereInReversedVortexFlow/system/setAlphaFieldDict

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+field       "alpha.water";
+type        sphere;
+radius      0.15;
+centre      (0.35 0.35 0.35);
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/0.orig/U

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volVectorField;
+    location    "0";
+    object      U;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -1 0 0 0 0];
+
+internalField   uniform (0 0 0);
+
+boundaryField
+{
+    left
+    {
+        type    slip;
+    }
+    right
+    {
+        type    slip;
+    }
+    top
+    {
+        type    slip;
+    }
+    bottom
+    {
+        type    slip;
+    }
+    front
+    {
+        type    empty;
+    }
+    back
+    {
+        type    empty;
+    }
+}
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/0.orig/alpha.water

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      alpha.water;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    left
+    {
+        type            zeroGradient;
+    }
+    right
+    {
+        type            zeroGradient;
+    }
+    top
+    {
+        type            zeroGradient;
+    }
+    bottom
+    {
+        type            zeroGradient;
+    }
+    front
+    {
+        type            empty;
+    }
+    back
+    {
+        type            empty;
+    }
+}
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/0.orig/p_rgh

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      p_rgh;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 -1 -2 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    left
+    {
+        type    fixedFluxPressure;
+        value   uniform 0;
+    }
+    right
+    {
+        type    fixedFluxPressure;
+        value   uniform 0;
+    }
+    top
+    {
+        type    fixedFluxPressure;
+        value   uniform 0;
+    }
+    bottom
+    {
+        type    fixedFluxPressure;
+        value   uniform 0;
+    }
+    front
+    {
+        type            empty;
+    }
+    back
+    {
+        type            empty;
+    }
+}
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/Allclean

+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+# Source tutorial clean functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+
+\rm -rf 0

tutorials/multiphase/interIsoFoam/standingWave/Allrun

+#!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+restore0Dir
+
+runApplication blockMesh
+runApplication -s 1 topoSet -dict system/topoSetDict1
+runApplication -s 1 refineMesh -dict system/refineMeshDict1 -overwrite
+runApplication -s 2 topoSet -dict system/topoSetDict2
+runApplication -s 2 refineMesh -dict system/refineMeshDict2 -overwrite
+
+runApplication setAlphaField
+
+runApplication $(getApplication)

tutorials/multiphase/interIsoFoam/standingWave/constant/dynamicMeshDict

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      dynamicMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dynamicFvMesh   staticFvMesh;
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/constant/g

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       uniformDimensionedVectorField;
+    location    "constant";
+    object      g;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -2 0 0 0 0];
+value           ( 0 0 -9.81 );
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/constant/transportProperties

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      transportProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+phases (water air);
+
+water
+{
+    transportModel  Newtonian;
+    nu              [0 2 -1 0 0 0 0] 1e-06;
+    rho             [1 -3 0 0 0 0 0] 1000;
+}
+
+air
+{
+    transportModel  Newtonian;
+    nu              [0 2 -1 0 0 0 0] 1.48e-05;
+    rho             [1 -3 0 0 0 0 0] 1;
+}
+
+sigma           sigma [ 1 0 -2 0 0 0 0 ] 0.00;
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/constant/turbulenceProperties

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      turbulenceProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+simulationType  laminar;
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/blockMeshDict

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      blockMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+convertToMeters 1;
+
+L	1;
+nx	50;
+
+y1 	-.01;
+y2	.01;
+ny	1;
+
+H	1;
+nz	50;
+
+vertices
+(
+    (0 $y1 0)
+    ($L $y1 0)
+    ($L $y2 0)
+    (0 $y2 0)
+    (0 $y1 $H)
+    ($L $y1 $H)
+    ($L $y2 $H)
+    (0 $y2 $H)
+);
+
+blocks
+(
+    hex (0 1 2 3 4 5 6 7) ($nx $ny $nz) simpleGrading (1 1 1)
+);
+
+edges
+(
+);
+
+boundary
+(
+    left
+    {
+        type patch;
+        faces
+        (
+            (0 4 7 3)
+        );
+    }
+    right
+    {
+        type patch;
+        faces
+        (
+            (1 2 6 5)
+        );
+    }
+    top
+    {
+        type patch;
+        faces
+        (
+            (4 5 6 7)
+        );
+    }
+    bottom
+    {
+        type patch;
+        faces
+        (
+            (0 3 2 1)
+        );
+    }
+    front
+    {
+        type empty;
+        faces
+        (
+            (0 1 5 4)
+        );
+    }
+    back
+    {
+        type empty;
+        faces
+        (
+            (2 3 7 6)
+        );
+    }
+);
+
+mergePatchPairs
+(
+);
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/controlDict

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+application     interIsoFoam;
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         10;
+
+deltaT          0.001;
+
+writeControl    adjustableRunTime;
+
+writeInterval   .1;
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision  6;
+
+writeCompression uncompressed;
+
+timeFormat      general;
+
+timePrecision   6;
+
+runTimeModifiable yes;
+
+adjustTimeStep  yes;
+
+maxCo           0.5;
+maxAlphaCo      0.5;
+
+maxDeltaT       1;
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/decomposeParDict

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      decomposeParDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+numberOfSubdomains 1;
+
+method          simple;
+
+simpleCoeffs
+{
+    n               ( 2 1 2 );
+    delta           0.001;
+}
+
+hierarchicalCoeffs
+{
+    n               ( 1 1 1 );
+    delta           0.001;
+    order           xyz;
+}
+
+manualCoeffs
+{
+    dataFile        "";
+}
+
+distributed     no;
+
+roots           ( );
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/fvSchemes

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default         CrankNicolson 0.5;
+}
+
+gradSchemes
+{
+    default         Gauss linear;
+}
+
+divSchemes
+{
+    div(rhoPhi,U)  Gauss limitedLinearV 1;
+    div(phi,alpha)  Gauss vanLeer;
+    div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
+}
+
+laplacianSchemes
+{
+    default         Gauss linear corrected;
+}
+
+interpolationSchemes
+{
+    default         linear;
+}
+
+snGradSchemes
+{
+    default         corrected;
+}
+
+fluxRequired
+{
+    default         no;
+    p_rgh;
+    pcorr;
+    alpha.water;
+}
+
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/fvSolution

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+
+    "alpha.*"
+    {
+        isoFaceTol      1e-6;
+        surfCellTol     1e-6;
+        nAlphaBounds    2;
+        snapTol         1e-12;
+        clip            true;
+
+        nAlphaSubCycles 1;
+        cAlpha          1;
+    }
+
+    "pcorr.*"
+    {
+        solver          PCG;
+        preconditioner  DIC;
+        tolerance       1e-10;
+        relTol          0;
+    }
+
+    p_rgh
+    {
+        solver          PCG;
+        preconditioner  DIC;
+        tolerance       1e-07;
+        relTol          0.05;
+    }
+
+    p_rghFinal
+    {
+        $p_rgh;
+        tolerance       1e-07;
+        relTol          0;
+    }
+
+    U
+    {
+        solver          PBiCG;
+        preconditioner  DILU;
+        tolerance       1e-06;
+        relTol          0;
+    }
+}
+
+PIMPLE
+{
+    momentumPredictor no;
+    nCorrectors      3;
+    nOuterCorrectors 1;
+    nNonOrthogonalCorrectors 0;
+    pRefCell        0;
+    pRefValue       0;
+}
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/refineMeshDict1

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      refineMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Cells to refine; name of cell set
+set c1;
+
+// Type of coordinate system:
+// - global : coordinate system same for every cell. Usually aligned with
+//   x,y,z axis. Specify in globalCoeffs section below.
+// - patchLocal : coordinate system different for every cell. Specify in
+//   patchLocalCoeffs section below.
+coordinateSystem global;
+//coordinateSystem patchLocal;
+
+// .. and its coefficients. x,y in this case. (normal direction is calculated
+// as tan1^tan2)
+globalCoeffs
+{
+    tan1 (1 0 0);
+    tan2 (0 1 0);
+}
+
+patchLocalCoeffs
+{
+    patch outside;  // Normal direction is facenormal of zero'th face of patch
+    tan1 (1 0 0);
+}
+
+// List of directions to refine
+directions
+(
+    tan1
+//    tan2
+    normal
+);
+
+// Whether to use hex topology. This will
+// - if patchLocal: all cells on selected patch should be hex
+// - split all hexes in 2x2x2 through the middle of edges.
+useHexTopology  true;
+
+// Cut purely geometric (will cut hexes through vertices) or take topology
+// into account. Incompatible with useHexTopology
+geometricCut    false;
+
+// Write meshes from intermediate steps
+writeMesh       false;
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/refineMeshDict2

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      refineMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Cells to refine; name of cell set
+set c2;
+
+// Type of coordinate system:
+// - global : coordinate system same for every cell. Usually aligned with
+//   x,y,z axis. Specify in globalCoeffs section below.
+// - patchLocal : coordinate system different for every cell. Specify in
+//   patchLocalCoeffs section below.
+coordinateSystem global;
+//coordinateSystem patchLocal;
+
+// .. and its coefficients. x,y in this case. (normal direction is calculated
+// as tan1^tan2)
+globalCoeffs
+{
+    tan1 (1 0 0);
+    tan2 (0 1 0);
+}
+
+patchLocalCoeffs
+{
+    patch outside;  // Normal direction is facenormal of zero'th face of patch
+    tan1 (1 0 0);
+}
+
+// List of directions to refine
+directions
+(
+    tan1
+//    tan2
+    normal
+);
+
+// Whether to use hex topology. This will
+// - if patchLocal: all cells on selected patch should be hex
+// - split all hexes in 2x2x2 through the middle of edges.
+useHexTopology  true;
+
+// Cut purely geometric (will cut hexes through vertices) or take topology
+// into account. Incompatible with useHexTopology
+geometricCut    false;
+
+// Write meshes from intermediate steps
+writeMesh       false;
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/setAlphaFieldDict

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+field       alpha.water;
+type        sin;
+direction   (1 0 0);
+up          (0 0 1);
+centre      (-0.5 0 0.5);
+period      2;
+amplitude   0.05;
+
+// ************************************************************************* //

tutorials/multiphase/interIsoFoam/standingWave/system/topoSetDict1

+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  plus                                  |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      topoSetDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+actions
+(
+    {
+        name    c1;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (-1e10 -1e10 0.3) (1e10 1e10 0.7);
+        }
+    }
+);
+
+// ************************************************************************* //