Solving euler eq on unstructured grid: how do i transform the flux back...?
i am quite new, sorry if the title of my question is a little clumsy.
(if you give a better one i will correct it)
My problem looks simple, and i have already a working c++ program.
But there is just one thing that i cannot accept. :confused:
So there is the Euler eq.
We are on an unstructured grid. (Triangles.)
We solve it with the first order Euler method.
Therefore I need the divergence of the flux.
I transform my speed vector from my global coordinate system to the local coordinate system of one of the face of the given triangle.
What is the flux at the face?
I average the flux of the flux of neighboring triangles.
Then i take the normal component of the flux. (normal to the face)
And here is my question:
Do i have to transform the flux to sum it up over the 3 faces of the given triangle? How?
(Now i have a working code which only transform rhou end rhov back.)
(2 dimensional problem)
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