blockMeshMerge: Adjusted merge-tolerance

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1443

src/mesh/blockMesh/blockMesh/blockMeshMerge.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2012 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -118,7 +118,7 @@ void Foam::blockMesh::calcMergeInfo()
         // the size of the block.
 
         boundBox bb(blockCells[blockPlabel].points(blockFaces, blockPoints));
-        const scalar mergeSqrDist = magSqr(SMALL*bb.span());
+        const scalar mergeSqrDist = magSqr(10*SMALL*bb.span());
 
         // This is an N^2 algorithm
 
@@ -582,4 +582,5 @@ void Foam::blockMesh::calcMergeInfo()
 
 }
 
+
 // ************************************************************************* //