Re: finite volume two dimensional steady-state diffusion in unstructured triangular mesh


In article <1168351573.837266.101780@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"=?iso-8859-1?q?Erik_Wikstr=F6m?=" <eriwik@xxxxxxxxxxxxxxxxxxx> writes:
I have a mesh consisting of triangles on which I'm to calculate heat
conduction. I understand how to calculate when the mesh consists of
structured square cells and I have an idea of how to do it with
triangles, but I'm wondering if someone have any good documentation
just to be sure.

My problem is this, how to select the centre of the triangle and how to
calculate the distance between nodes. My current idea is to use the
centroid as centre and to calculate the distance between nodes by
taking the shortest distance from the centre to shared edge for both
the triangles and adding them up. Does anyone know how this is usually
done?

--
Erik Wikstr=F6m


in the subject line you had "finite volume" : then you must take the
center of the circumscribed circle in order to get connections which
cut the edges orthogonally. you compute the distance as the euclidean distance
and apply standard finite differences in order to express the normal derivatives
hth
peter
.

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