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Numbering convention of vertices in the boundary condition
Title
Question
The numbering of two faces goes in opposite directions.  For block 1, it is in clockwise direction, and for the other block, it is in the counterclockwise direction.  Is it because one has look at these faces from "inside the block" and do the numbering in clockwise direction?

OpenFOAM-version-7 Multi-block-Meshing-of-a-2D-Geometry-in-OpenFOAM 06-07 min 50-60 sec 17-09-20, 1:53 p.m. kannan

Answers:

Dear Prof. Kannan,

Yes, as mentioned in the previous tutorial, the general convention while defining the faces of any block in the 'boundary' list is that: "the vertices should be ordered clockwise when viewed from inside that block". This is the reason that two opposite facing faces are also ordered in the opposite direction.

Regards,
Ashley
17-09-20, 3:27 p.m. ashleymelvin1193@gmail.com

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