[decibelle]

hi,

I would like to create a sphere with block mesh. I found a code that you can see on this page: https://github.com/OpenFOAM/OpenFOAM.../blockMeshDict

In this code I don't understand this part:

v 0.5773502;
mv -0.5773502;

a 0.7071067;
ma -0.7071067;

vertices
(
    ($mv $mv $mv)
    ( $v $mv $mv)
    ( $v  $v $mv)
    ($mv  $v $mv)
    ($mv $mv  $v)
    ( $v $mv  $v)
    ( $v  $v  $v)
    ($mv  $v  $v)
);

what's represent the value v?

thanks in advance

[piu58]

0.577 is 1/sqrt(3)

[decibelle]

Ok thanks, now I don't understand what represent this 1/sqrt(3).
When I generate this mesh is not a sphere, do you know what I have to replace in this script to generate a sphere?

[eymenrabia]

Originally Posted by piu58

0.577 is 1/sqrt(3)

Greetings from Turkey,

I am a student studying Aerospace Engineering. Currently, i am studying on OpenFoam blockMesh with its tutorial sphere7. But there is a one point that I couldnt understand. In the blockMeshDict of sphere7, there is some value such as v, mv, a, ma etc. I couldnt find where these values come from exactly. There is a relationship between them but i couldnt understand it. Can you help me about this? Also I couldnt find the book which you mentioned it I mean Hermann Schlichting, 1950

Thank you in advance
Regards.

[olesen]

Originally Posted by eymenrabia

Greetings from Turkey,

I am a student studying Aerospace Engineering. Currently, i am studying on OpenFoam blockMesh with its tutorial sphere7. But there is a one point that I couldnt understand. In the blockMeshDict of sphere7, there is some value such as v, mv, a, ma etc. I couldnt find where these values come from exactly.

The '$v' , '$mv' etc variables are references to the values defined earlier in the dictionary. You can think of them as the OpenFOAM equivalent of shell variables if that helps.


/mark