Initial commit

applications/solvers/combustion/PDRFoam/createFieldRefs.H

+const volScalarField& psi = thermo.psi();

applications/solvers/combustion/PDRFoam/ftEqn.H

+if (composition.contains("ft"))
+{
+    volScalarField& ft = composition.Y("ft");
+
+    solve
+    (
+        betav*fvm::ddt(rho, ft)
+      + mvConvection->fvmDiv(phi, ft)
+      - fvm::laplacian(Db, ft)
+    );
+}