ENH: twoPhaseEulerFoam: Removed requirement that a model (most likely "none") had to be specified for all pairs

applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/dragModel/dragModel.C

@@ -35,6 +35,8 @@ namespace Foam
     defineRunTimeSelectionTable(dragModel, dictionary);
 }
 
+const Foam::dimensionSet Foam::dragModel::dimK(1, -3, -1, 0, 0);
+
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 

applications/solvers/multiphase/twoPhaseEulerFoam/interfacialModels/dragModels/dragModel/dragModel.H

@@ -93,6 +93,12 @@ public:
         );
 
 
+    // Static data members
+
+        //- Coefficient dimensions
+        static const dimensionSet dimK;
+
+
     // Constructors
 
         // Construct without residual constants