ENH: fieldSources - added ability to apply source to eqn with specified name

src/finiteVolume/cfdTools/general/fieldSources/basicSource/basicSource/basicSourceList.H

@@ -100,6 +100,10 @@ public:
             template<class Type>
             void apply(fvMatrix<Type>& eqn);
 
+            //- Apply sources to equation with specified name
+            template<class Type>
+            void apply(fvMatrix<Type>& eqn, const word& name);
+
 
         // I-O
 

src/finiteVolume/cfdTools/general/fieldSources/basicSource/basicSource/basicSourceListTemplates.C

@@ -28,9 +28,14 @@ License
 template<class Type>
 void Foam::basicSourceList::apply(fvMatrix<Type>& eqn)
 {
-    checkApplied();
+    apply(eqn, eqn.psi().name());
+}
+
 
-    const word& fieldName = eqn.psi().name();
+template<class Type>
+void Foam::basicSourceList::apply(fvMatrix<Type>& eqn, const word& fieldName)
+{
+    checkApplied();
 
     forAll(*this, i)
     {