[Nikunj.R]

Hello All!

I have this questions which has been bugging me from quite sometime now. I think many of you might find it very trivial.

So attached with this post is blockMeshDict for a very simple square box. The image following the box is that of a slice of the volume. I dont understand despite defining all block such that all the local axes are aligned along the real x, y, z coordinates, why am I getting those slanting edges for every cell?

BlockMesh:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.1.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices
(
(0 0 0)
(10 0 0)
(10 5 0)
(0 5 0)
(0 0 10)
(10 0 10)
(10 5 10)
(0 5 10)
);

blocks
(
hex (0 1 2 3 4 5 6 7) (20 10 20) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
floor
{
type wall;
faces
(
(1 5 4 0)
);
}
ceiling
{
type wall;
faces
(
(3 7 6 2)
);
}
fixedWalls
{
type wall;
faces
(
(0 4 7 3)
(2 6 5 1)
(0 3 2 1)
(4 5 6 7)
);
}
);

mergePatchPairs
(
);

// ************************************************** *********************** //