ENH: rhePimpleFoam: Merged dynamic mesh functionality of rhoPimpleDyMFoam into rhoPimpleFoam

and replaced rhoPimpleDyMFoam with a script which reports this change.

The rhoPimpleDyMFoam tutorials have been moved into the rhoPimpleFoam directory.

This change is the first of a set of developments to merge dynamic mesh
functionality into the standard solvers to improve consistency, usability,
flexibility and maintainability of these solvers.

Henry G. Weller
CFD Direct Ltd.

rhoReactingFoam: Updated for changes to rhoPimpleFoam files

applications/solvers/combustion/reactingFoam/rhoReactingFoam/rhoReactingFoam.C

@@ -53,10 +53,11 @@ int main(int argc, char *argv[])
     #include "createTime.H"
     #include "createMesh.H"
     #include "createControl.H"
-    #include "createTimeControls.H"
     #include "initContinuityErrs.H"
     #include "createFields.H"
     #include "createFieldRefs.H"
+    #include "createRhoUfIfPresent.H"
+    #include "createTimeControls.H"
 
     turbulence->validate();
 

applications/solvers/compressible/rhoPimpleFoam/Make/options

@@ -7,6 +7,8 @@ EXE_INC = \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I$(LIB_SRC)/meshTools/lnInclude \
     -I$(LIB_SRC)/sampling/lnInclude \
+    -I$(LIB_SRC)/dynamicFvMesh/lnInclude \
+    -I$(LIB_SRC)/dynamicMesh/lnInclude
 
 EXE_LIBS = \
     -lcompressibleTransportModels \
@@ -17,4 +19,7 @@ EXE_LIBS = \
     -lfiniteVolume \
     -lmeshTools \
     -lsampling \
-    -lfvOptions
+    -lfvOptions \
+    -ldynamicFvMesh \
+    -ltopoChangerFvMesh \
+    -ldynamicMesh

applications/solvers/compressible/rhoPimpleFoam/correctPhi.H

@@ -6,6 +6,6 @@ CorrectPhi
     rho,
     psi,
     dimensionedScalar("rAUf", dimTime, 1),
-    divrhoU,
+    divrhoU(),
     pimple
 );

applications/solvers/compressible/rhoPimpleFoam/pEqn.H

@@ -20,9 +20,10 @@ surfaceScalarField phiHbyA
 (
     "phiHbyA",
     fvc::interpolate(rho)*fvc::flux(HbyA)
-  + rhorAUf*fvc::ddtCorr(rho, U, phi)
+  + rhorAUf*fvc::ddtCorr(rho, U, phi, rhoUf)
 );
 
+fvc::makeRelative(phiHbyA, rho, U);
 MRF.makeRelative(fvc::interpolate(rho), phiHbyA);
 
 // Update the pressure BCs to ensure flux consistency
@@ -103,7 +104,15 @@ if (pressureControl.limit(p))
 thermo.correctRho(psi*p - psip0, rhoMin, rhoMax) ;
 rho = thermo.rho();
 
+// Correct rhoUf if the mesh is moving
+fvc::correctRhoUf(rhoUf, rho, U, phi);
+
 if (thermo.dpdt())
 {
     dpdt = fvc::ddt(p);
+
+    if (mesh.moving())
+    {
+        dpdt -= fvc::div(fvc::meshPhi(rho, U), p);
+    }
 }

applications/solvers/compressible/rhoPimpleFoam/pcEqn.H

@@ -1,3 +1,5 @@
+InfoInFunction << "consistent" << endl;
+
 if (!pimple.SIMPLErho())
 {
     rho = thermo.rho();
@@ -21,10 +23,11 @@ surfaceScalarField phiHbyA
     "phiHbyA",
     (
         fvc::interpolate(rho)*fvc::flux(HbyA)
-      + fvc::interpolate(rho*rAU)*fvc::ddtCorr(rho, U, phi)
+      + fvc::interpolate(rho*rAU)*fvc::ddtCorr(rho, U, phi, rhoUf)
     )
 );
 
+fvc::makeRelative(phiHbyA, rho, U);
 MRF.makeRelative(fvc::interpolate(rho), phiHbyA);
 
 volScalarField rhorAtU("rhorAtU", rho*rAtU);
@@ -114,7 +117,15 @@ if (pressureControl.limit(p))
 thermo.correctRho(psi*p - psip0, rhoMin, rhoMax) ;
 rho = thermo.rho();
 
+// Correct rhoUf if the mesh is moving
+fvc::correctRhoUf(rhoUf, rho, U, phi);
+
 if (thermo.dpdt())
 {
     dpdt = fvc::ddt(p);
+
+    if (mesh.moving())
+    {
+        dpdt -= fvc::div(fvc::meshPhi(rho, U), p);
+    }
 }

applications/solvers/compressible/rhoPimpleFoam/readControls.H

@@ -0,0 +1,10 @@
+#include "readTimeControls.H"
+
+bool correctPhi = pimple.dict().lookupOrDefault<Switch>
+(
+    "correctPhi",
+    !isA<staticFvMesh>(mesh)
+);
+
+bool checkMeshCourantNo =
+    pimple.dict().lookupOrDefault<Switch>("checkMeshCourantNo", false);

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleDyMFoam/Make/files

@@ -1,3 +0,0 @@
-rhoPimpleDyMFoam.C
-
-EXE = $(FOAM_APPBIN)/rhoPimpleDyMFoam

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleDyMFoam/Make/options

@@ -1,26 +0,0 @@
-EXE_INC = \
-    -I.. \
-    -I$(LIB_SRC)/transportModels/compressible/lnInclude \
-    -I$(LIB_SRC)/thermophysicalModels/basic/lnInclude \
-    -I$(LIB_SRC)/TurbulenceModels/turbulenceModels/lnInclude \
-    -I$(LIB_SRC)/TurbulenceModels/compressible/lnInclude \
-    -I$(LIB_SRC)/finiteVolume/cfdTools \
-    -I$(LIB_SRC)/finiteVolume/lnInclude \
-    -I$(LIB_SRC)/meshTools/lnInclude \
-    -I$(LIB_SRC)/sampling/lnInclude \
-    -I$(LIB_SRC)/dynamicFvMesh/lnInclude \
-    -I$(LIB_SRC)/dynamicMesh/lnInclude
-
-EXE_LIBS = \
-    -lcompressibleTransportModels \
-    -lfluidThermophysicalModels \
-    -lspecie \
-    -lturbulenceModels \
-    -lcompressibleTurbulenceModels \
-    -lfiniteVolume \
-    -lmeshTools \
-    -lsampling \
-    -lfvOptions \
-    -ldynamicFvMesh \
-    -ltopoChangerFvMesh \
-    -ldynamicMesh

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleDyMFoam/createControls.H

@@ -1,11 +0,0 @@
-#include "createTimeControls.H"
-
-bool correctPhi
-(
-    pimple.dict().lookupOrDefault("correctPhi", true)
-);
-
-bool checkMeshCourantNo
-(
-    pimple.dict().lookupOrDefault("checkMeshCourantNo", false)
-);

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleDyMFoam/pEqn.H

@@ -1,121 +0,0 @@
-if (!pimple.SIMPLErho())
-{
-    rho = thermo.rho();
-}
-
-// Thermodynamic density needs to be updated by psi*d(p) after the
-// pressure solution
-const volScalarField psip0(psi*p);
-
-volScalarField rAU(1.0/UEqn.A());
-surfaceScalarField rhorAUf("rhorAUf", fvc::interpolate(rho*rAU));
-volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p));
-
-if (pimple.nCorrPISO() <= 1)
-{
-    tUEqn.clear();
-}
-
-surfaceScalarField phiHbyA
-(
-    "phiHbyA",
-    fvc::flux(rho*HbyA)
-  + rhorAUf*fvc::ddtCorr(rho, U, rhoUf)
-);
-
-fvc::makeRelative(phiHbyA, rho, U);
-MRF.makeRelative(fvc::interpolate(rho), phiHbyA);
-
-// Update the pressure BCs to ensure flux consistency
-constrainPressure(p, rho, U, phiHbyA, rhorAUf, MRF);
-
-if (pimple.transonic())
-{
-    surfaceScalarField phid
-    (
-        "phid",
-        (fvc::interpolate(psi)/fvc::interpolate(rho))*phiHbyA
-    );
-
-    phiHbyA -= fvc::interpolate(psi*p)*phiHbyA/fvc::interpolate(rho);
-
-    while (pimple.correctNonOrthogonal())
-    {
-        fvScalarMatrix pEqn
-        (
-            fvc::ddt(rho) + psi*correction(fvm::ddt(p))
-          + fvc::div(phiHbyA)
-          + fvm::div(phid, p)
-          - fvm::laplacian(rhorAUf, p)
-         ==
-            fvOptions(psi, p, rho.name())
-        );
-
-        // Relax the pressure equation to ensure diagonal-dominance
-        pEqn.relax();
-
-        pEqn.solve(mesh.solver(p.select(pimple.finalInnerIter())));
-
-        if (pimple.finalNonOrthogonalIter())
-        {
-            phi = phiHbyA + pEqn.flux();
-        }
-    }
-}
-else
-{
-    while (pimple.correctNonOrthogonal())
-    {
-        // Pressure corrector
-        fvScalarMatrix pEqn
-        (
-            fvc::ddt(rho) + psi*correction(fvm::ddt(p))
-          + fvc::div(phiHbyA)
-          - fvm::laplacian(rhorAUf, p)
-         ==
-            fvOptions(psi, p, rho.name())
-        );
-
-        pEqn.solve(mesh.solver(p.select(pimple.finalInnerIter())));
-
-        if (pimple.finalNonOrthogonalIter())
-        {
-            phi = phiHbyA + pEqn.flux();
-        }
-    }
-}
-
-#include "rhoEqn.H"
-#include "compressibleContinuityErrs.H"
-
-// Explicitly relax pressure for momentum corrector
-p.relax();
-
-U = HbyA - rAU*fvc::grad(p);
-U.correctBoundaryConditions();
-fvOptions.correct(U);
-K = 0.5*magSqr(U);
-
-if (pressureControl.limit(p))
-{
-    p.correctBoundaryConditions();
-}
-
-thermo.correctRho(psi*p - psip0, rhoMin, rhoMax);
-rho = thermo.rho();
-
-{
-    rhoUf = fvc::interpolate(rho*U);
-    surfaceVectorField n(mesh.Sf()/mesh.magSf());
-    rhoUf += n*(fvc::absolute(phi, rho, U)/mesh.magSf() - (n & rhoUf));
-}
-
-if (thermo.dpdt())
-{
-    dpdt = fvc::ddt(p);
-
-    if (mesh.moving())
-    {
-        dpdt -= fvc::div(fvc::meshPhi(rho, U), p);
-    }
-}

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleDyMFoam/readControls.H

@@ -1,6 +0,0 @@
-#include "readTimeControls.H"
-
-correctPhi = pimple.dict().lookupOrDefault("correctPhi", true);
-
-checkMeshCourantNo =
-    pimple.dict().lookupOrDefault("checkMeshCourantNo", false);

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleDyMFoam/rhoPimpleDyMFoam.C

@@ -1,168 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-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
-    rhoPimpleDyMFoam
-
-Group
-    grpCompressibleSolvers grpMovingMeshSolvers
-
-Description
-    Transient solver for turbulent flow of compressible fluids for HVAC and
-    similar applications, with optional mesh motion and mesh topology changes.
-
-    Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
-    pseudo-transient simulations.
-
-\*---------------------------------------------------------------------------*/
-
-#include "fvCFD.H"
-#include "dynamicFvMesh.H"
-#include "fluidThermo.H"
-#include "turbulentFluidThermoModel.H"
-#include "bound.H"
-#include "pimpleControl.H"
-#include "pressureControl.H"
-#include "CorrectPhi.H"
-#include "fvOptions.H"
-#include "localEulerDdtScheme.H"
-#include "fvcSmooth.H"
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-int main(int argc, char *argv[])
-{
-    #include "postProcess.H"
-
-    #include "setRootCase.H"
-    #include "createTime.H"
-    #include "createDynamicFvMesh.H"
-    #include "createControl.H"
-    #include "initContinuityErrs.H"
-    #include "createFields.H"
-    #include "createFieldRefs.H"
-    #include "createRhoUf.H"
-    #include "createControls.H"
-
-    turbulence->validate();
-
-    if (!LTS)
-    {
-        #include "compressibleCourantNo.H"
-        #include "setInitialDeltaT.H"
-    }
-
-    // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-    Info<< "\nStarting time loop\n" << endl;
-
-    while (runTime.run())
-    {
-        #include "readControls.H"
-
-        {
-            // Store divrhoU from the previous mesh so that it can be mapped
-            // and used in correctPhi to ensure the corrected phi has the
-            // same divergence
-            volScalarField divrhoU
-            (
-                "divrhoU",
-                fvc::div(fvc::absolute(phi, rho, U))
-            );
-
-            if (LTS)
-            {
-                #include "setRDeltaT.H"
-            }
-            else
-            {
-                #include "compressibleCourantNo.H"
-                #include "setDeltaT.H"
-            }
-
-            runTime++;
-
-            Info<< "Time = " << runTime.timeName() << nl << endl;
-
-            // Store momentum to set rhoUf for introduced faces.
-            volVectorField rhoU("rhoU", rho*U);
-
-            // Do any mesh changes
-            mesh.update();
-
-            if (mesh.changing())
-            {
-                MRF.update();
-
-                if (correctPhi)
-                {
-                    // Calculate absolute flux from the mapped surface velocity
-                    phi = mesh.Sf() & rhoUf;
-
-                    #include "correctPhi.H"
-
-                    // Make the fluxes relative to the mesh-motion
-                    fvc::makeRelative(phi, rho, U);
-                }
-
-                if (checkMeshCourantNo)
-                {
-                    #include "meshCourantNo.H"
-                }
-            }
-        }
-
-        #include "rhoEqn.H"
-        Info<< "rhoEqn max/min : " << max(rho).value()
-            << " " << min(rho).value() << endl;
-
-        // --- Pressure-velocity PIMPLE corrector loop
-        while (pimple.loop())
-        {
-            #include "UEqn.H"
-            #include "EEqn.H"
-
-            // --- Pressure corrector loop
-            while (pimple.correct())
-            {
-                #include "pEqn.H"
-            }
-
-            if (pimple.turbCorr())
-            {
-                turbulence->correct();
-            }
-        }
-
-        runTime.write();
-
-        runTime.printExecutionTime(Info);
-    }
-
-    Info<< "End\n" << endl;
-
-    return 0;
-}
-
-
-// ************************************************************************* //

applications/solvers/compressible/rhoPimpleFoam/rhoPimpleFoam.C

@@ -29,7 +29,7 @@ Group
 
 Description
     Transient solver for turbulent flow of compressible fluids for HVAC and
-    similar applications.
+    similar applications, with optional mesh motion and mesh topology changes.
 
     Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
     pseudo-transient simulations.
@@ -37,11 +37,13 @@ Description
 \*---------------------------------------------------------------------------*/
 
 #include "fvCFD.H"
+#include "dynamicFvMesh.H"
 #include "fluidThermo.H"
 #include "turbulentFluidThermoModel.H"
 #include "bound.H"
 #include "pimpleControl.H"
 #include "pressureControl.H"
+#include "CorrectPhi.H"
 #include "fvOptions.H"
 #include "localEulerDdtScheme.H"
 #include "fvcSmooth.H"
@@ -54,12 +56,13 @@ int main(int argc, char *argv[])
 
     #include "setRootCase.H"
     #include "createTime.H"
-    #include "createMesh.H"
+    #include "createDynamicFvMesh.H"
     #include "createControl.H"
-    #include "createTimeControls.H"
     #include "initContinuityErrs.H"
     #include "createFields.H"
     #include "createFieldRefs.H"
+    #include "createRhoUfIfPresent.H"
+    #include "createTimeControls.H"
 
     turbulence->validate();
 
@@ -75,7 +78,21 @@ int main(int argc, char *argv[])
 
     while (runTime.run())
     {
-        #include "readTimeControls.H"
+        #include "readControls.H"
+
+        {
+            // Store divrhoU from the previous mesh so that it can be mapped
+            // and used in correctPhi to ensure the corrected phi has the
+            // same divergence
+            autoPtr<volScalarField> divrhoU;
+            if (correctPhi)
+            {
+                divrhoU = new volScalarField
+                (
+                    "divrhoU",
+                    fvc::div(fvc::absolute(phi, rho, U))
+                );
+            }
 
             if (LTS)
             {
@@ -91,6 +108,40 @@ int main(int argc, char *argv[])
 
             Info<< "Time = " << runTime.timeName() << nl << endl;
 
+            // Store momentum to set rhoUf for introduced faces.
+            autoPtr<volVectorField> rhoU;
+            if (rhoUf.valid())
+            {
+                rhoU = new volVectorField("rhoU", rho*U);
+            }
+
+            // Do any mesh changes
+            mesh.update();
+
+            #include "updateRhoUf.H"
+
+            if (mesh.changing())
+            {
+                MRF.update();
+
+                if (correctPhi)
+                {
+                    // Calculate absolute flux from the mapped surface velocity
+                    phi = mesh.Sf() & rhoUf();
+
+                    #include "correctPhi.H"
+
+                    // Make the fluxes relative to the mesh-motion
+                    fvc::makeRelative(phi, rho, U);
+                }
+
+                if (checkMeshCourantNo)
+                {
+                    #include "meshCourantNo.H"
+                }
+            }
+        }
+
         if (pimple.nCorrPIMPLE() <= 1)
         {
             #include "rhoEqn.H"

applications/solvers/compressible/sonicFoam/sonicDyMFoam/Make/options

@@ -1,6 +1,6 @@
 EXE_INC = \
     -I.. \
-    -I../../rhoPimpleFoam/rhoPimpleDyMFoam \
+    -I../../rhoPimpleFoam \
     -I$(LIB_SRC)/transportModels/compressible/lnInclude \
     -I$(LIB_SRC)/thermophysicalModels/basic/lnInclude \
     -I$(LIB_SRC)/TurbulenceModels/turbulenceModels/lnInclude \

applications/solvers/compressible/sonicFoam/sonicDyMFoam/sonicDyMFoam.C

@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
     #include "createTime.H"
     #include "createDynamicFvMesh.H"
     #include "createControl.H"
-    #include "createControls.H"
+    #include "createTimeControls.H"
     #include "createFields.H"
     #include "createFieldRefs.H"
     #include "createRhoUf.H"

applications/solvers/lagrangian/sprayFoam/sprayDyMFoam/Make/options

@@ -1,7 +1,7 @@
 EXE_INC = \
     -I.. \
     -I../../reactingParcelFoam \
-    -I../../../compressible/rhoPimpleFoam/rhoPimpleDyMFoam \
+    -I../../../compressible/rhoPimpleFoam \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I${LIB_SRC}/meshTools/lnInclude \
     -I${LIB_SRC}/sampling/lnInclude \

applications/solvers/lagrangian/sprayFoam/sprayDyMFoam/sprayDyMFoam.C

@@ -54,7 +54,7 @@ int main(int argc, char *argv[])
     #include "createTime.H"
     #include "createDynamicFvMesh.H"
     #include "createControl.H"
-    #include "createControls.H"
+    #include "createTimeControls.H"
     #include "createFields.H"
     #include "createFieldRefs.H"
     #include "createRhoUf.H"

bin/rhoPimpleDyMFoam

@@ -0,0 +1 @@
+mergedDyM

src/finiteVolume/cfdTools/compressible/createRhoUfIfPresent.H

@@ -0,0 +1,51 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2017 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+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/>.
+
+Global
+    createRhoUf
+
+Description
+    Creates and initialises the velocity field rhoUf if present.
+
+\*---------------------------------------------------------------------------*/
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+autoPtr<surfaceVectorField> rhoUf;
+
+IOobject rhoUfHeader
+(
+    "rhoUf",
+    runTime.timeName(),
+    mesh,
+    IOobject::MUST_READ,
+    IOobject::AUTO_WRITE
+);
+
+if (rhoUfHeader.typeHeaderOk<surfaceVectorField>(true))
+{
+    Info<< "Reading face momentum rhoUf\n" << endl;
+    rhoUf = new surfaceVectorField(rhoUfHeader, mesh);
+}
+
+// ************************************************************************* //

src/finiteVolume/cfdTools/compressible/updateRhoUf.H

@@ -0,0 +1,55 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2017 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+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/>.
+
+Global
+    updateRhoUf
+
+Description
+    Constructs the face momentum field rhoUf if not already constructed.
+
+\*---------------------------------------------------------------------------*/
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+if (mesh.changing())
+{
+    if (!rhoUf.valid())
+    {
+        Info<< "Constructing face momentum rhoUf" << endl;
+
+        rhoUf = new surfaceVectorField
+        (
+            IOobject
+            (
+                "rhoUf",
+                runTime.timeName(),
+                mesh,
+                IOobject::READ_IF_PRESENT,
+                IOobject::AUTO_WRITE
+            ),
+            fvc::interpolate(rho*U)
+        );
+    }
+}
+
+// ************************************************************************* //

tutorials/compressible/rhoPimpleFoam/RAS/annularThermalMixer/system/controlDict

@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-application     rhoPimpleDyMFoam;
+application     rhoPimpleFoam;
 
 startFrom       latestTime;