ENH: fvOptions - cache modelType so that derived classes can generate appropriate coeffs_ dict

src/fvOptions/fvOptions/fvOption.C

@@ -255,6 +255,7 @@ Foam::fv::option::option
 )
 :
     name_(name),
+    modelType_(modelType),
     mesh_(mesh),
     dict_(dict),
     coeffs_(dict.subDict(modelType + "Coeffs")),

src/fvOptions/fvOptions/fvOption.H

@@ -94,7 +94,10 @@ protected:
     // Protected data
 
         //- Source name
-        word name_;
+        const word name_;
+
+        //- Model type
+        const word modelType_;
 
         //- Reference to the mesh database
         const fvMesh& mesh_;

src/fvOptions/fvOptions/fvOptionIO.C

@@ -96,7 +96,7 @@ bool Foam::fv::option::read(const dictionary& dict)
         dict.lookup("duration") >> duration_;
     }
 
-    coeffs_ = dict.subDict(type() + "Coeffs");
+    coeffs_ = dict.subDict(modelType_ + "Coeffs");
 
     return true;
 }