driftFluxFoam: Corrected Udm BCs

Added 'READ_IF_PRESENT' option to support overriding of the default BCs
for complex problems requiring special treatment of Udm at boundaries.

Resolves bug-report http://bugs.openfoam.org/view.php?id=2317

applications/solvers/multiphase/driftFluxFoam/relativeVelocityModels/relativeVelocityModel/relativeVelocityModel.C

@@ -24,6 +24,9 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "relativeVelocityModel.H"
+#include "fixedValueFvPatchFields.H"
+#include "slipFvPatchFields.H"
+#include "partialSlipFvPatchFields.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
@@ -33,6 +36,34 @@ namespace Foam
     defineRunTimeSelectionTable(relativeVelocityModel, dictionary);
 }
 
+// * * * * * * * * * * * * * Private Member Functions   * * * * * * * * * * * //
+
+Foam::wordList Foam::relativeVelocityModel::UdmPatchFieldTypes() const
+{
+    const volVectorField& U = mixture_.U();
+
+    wordList UdmTypes
+    (
+        U.boundaryField().size(),
+        calculatedFvPatchScalarField::typeName
+    );
+
+    forAll(U.boundaryField(), i)
+    {
+        if
+        (
+            isA<fixedValueFvPatchVectorField>(U.boundaryField()[i])
+         || isA<slipFvPatchVectorField>(U.boundaryField()[i])
+         || isA<partialSlipFvPatchVectorField>(U.boundaryField()[i])
+        )
+        {
+            UdmTypes[i] = fixedValueFvPatchVectorField::typeName;
+        }
+    }
+
+    return UdmTypes;
+}
+
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
@@ -55,11 +86,12 @@ Foam::relativeVelocityModel::relativeVelocityModel
             "Udm",
             alphac_.time().timeName(),
             alphac_.mesh(),
-            IOobject::NO_READ,
+            IOobject::READ_IF_PRESENT,
             IOobject::AUTO_WRITE
         ),
         alphac_.mesh(),
-        dimensionedVector("Udm", dimVelocity, Zero)
+        dimensionedVector("Udm", dimVelocity, Zero),
+        UdmPatchFieldTypes()
     )
 {}
 

applications/solvers/multiphase/driftFluxFoam/relativeVelocityModels/relativeVelocityModel/relativeVelocityModel.H

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2014 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2014-2016 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -52,12 +52,16 @@ class relativeVelocityModel
 {
     // Private Member Functions
 
+        //- Return the list of patchFieldTypes for Udm derived from U
+        wordList UdmPatchFieldTypes() const;
+
         //- Disallow default bitwise copy construct
         relativeVelocityModel(const relativeVelocityModel&);
 
         //- Disallow default bitwise assignment
         void operator=(const relativeVelocityModel&);
 
+
 protected:
 
     // Protected data