ENH: the adjoint grid displacement field (ma)

is now appended by the name of the adjoint solver, if more than one
exist. This was necessary for an accurate continuation since, before
these changes, only the ma field of the last solver was written. As a
result, when restarting the first adjoint solver was reading the ma
field of the last one. No changes are needed in fvSolution and fvSchemes
w.r.t. the previous code version.

src/optimisation/adjointOptimisation/adjoint/optimisation/adjointSensitivity/incompressible/adjointMeshMovementSolver/adjointMeshMovementSolverIncompressible.C

@@ -5,8 +5,8 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2007-2019 PCOpt/NTUA
-    Copyright (C) 2013-2019 FOSS GP
+    Copyright (C) 2007-2021 PCOpt/NTUA
+    Copyright (C) 2013-2021 FOSS GP
     Copyright (C) 2019-2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
@@ -28,6 +28,8 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "adjointMeshMovementSolverIncompressible.H"
+#include "incompressibleAdjointSolver.H"
+#include "fixedValueFvPatchFields.H"
 #include "subCycleTime.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -70,12 +72,22 @@ adjointMeshMovementSolver::adjointMeshMovementSolver
     tolerance_(-1),
     ma_
     (
-        variablesSet::autoCreateMeshMovementField
+        IOobject
         (
+            word
+            (
+                adjointSensitivity.adjointVars().useSolverNameForFields() ?
+                "ma" + adjointSensitivity.adjointSolver().solverName() :
+                "ma"
+            ),
+            mesh.time().timeName(),
             mesh,
-            "ma",
-            dimensionSet(pow3(dimLength/dimTime))
-        )
+            IOobject::READ_IF_PRESENT,
+            IOobject::AUTO_WRITE
+        ),
+        mesh,
+        dimensionedVector(pow3(dimLength/dimTime), Zero),
+        fixedValueFvPatchVectorField::typeName
     ),
     source_
     (
@@ -142,7 +154,8 @@ void adjointMeshMovementSolver::solve()
         maEqn.boundaryManipulate(ma_.boundaryFieldRef());
 
         //scalar residual = max(maEqn.solve().initialResidual());
-        scalar residual = mag(maEqn.solve().initialResidual());
+        scalar residual =
+            mag(Foam::solve(maEqn, mesh_.solverDict("ma")).initialResidual());
 
         Info<< "Max ma " << gMax(mag(ma_)()) << endl;
 

src/optimisation/adjointOptimisation/adjoint/optimisation/adjointSensitivity/incompressible/adjointSensitivity/adjointSensitivityIncompressible.C

@@ -5,8 +5,8 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2007-2020 PCOpt/NTUA
-    Copyright (C) 2013-2020 FOSS GP
+    Copyright (C) 2007-2021 PCOpt/NTUA
+    Copyright (C) 2013-2021 FOSS GP
     Copyright (C) 2019-2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
@@ -100,6 +100,24 @@ autoPtr<adjointSensitivity> adjointSensitivity::New
 
 // * * * * * * * * * * * * * * *  Member Functions   * * * * * * * * * * * * //
 
+const incompressibleVars& adjointSensitivity::primalVars() const
+{
+    return primalVars_;
+}
+
+
+const incompressibleAdjointVars& adjointSensitivity::adjointVars() const
+{
+    return adjointVars_;
+}
+
+
+const incompressibleAdjointSolver& adjointSensitivity::adjointSolver() const
+{
+    return adjointSolver_;
+}
+
+
 const scalarField& adjointSensitivity::calculateSensitivities()
 {
     assembleSensitivities();

src/optimisation/adjointOptimisation/adjoint/optimisation/adjointSensitivity/incompressible/adjointSensitivity/adjointSensitivityIncompressible.H

@@ -5,8 +5,8 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2007-2020 PCOpt/NTUA
-    Copyright (C) 2013-2020 FOSS GP
+    Copyright (C) 2007-2021 PCOpt/NTUA
+    Copyright (C) 2013-2021 FOSS GP
     Copyright (C) 2019 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
@@ -155,6 +155,15 @@ public:
 
     // Member Functions
 
+        //- Get primal variables
+        const incompressibleVars& primalVars() const;
+
+        //- Get adjoint variables
+        const incompressibleAdjointVars& adjointVars() const;
+
+        //- Get adjoint solver
+        const incompressibleAdjointSolver& adjointSolver() const;
+
         //- Accumulate sensitivity integrands
         //  Corresponds to the flow and adjoint part of the sensitivities
         virtual void accumulateIntegrand(const scalar dt) = 0;