CFD Online Discussion Forums - [blockMesh] blockMesh code algorithm

Hi, foamers.
I want to understand how blockMesh makes mesh from blockMeshDict file.

Is it possible to make mesh with automatically scale shoosing?
As I saw in UserGuide we can write amount of cells by hands.

For example (as written in OpenFoam's UserGuide):

Code:

blocks

(

hex (0 1 2 3 4 5 6 7)

(10 10 10) // numbers of cells in each direction

simpleGrading (1 2 3)

);

But is exists another ways of defining necessary cell amount?

I am beginner in OpenFOAM and will appreciate to get any help.

Thanks.