- **Main CFD Forum**
(*https://www.cfd-online.com/Forums/main/*)

- - **Solving euler eq on unstructured grid: how do i transform the flux back...?**
(*https://www.cfd-online.com/Forums/main/97344-solving-euler-eq-unstructured-grid-how-do-i-transform-flux-back.html*)

Solving euler eq on unstructured grid: how do i transform the flux back...?Hi all,
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) Thank you. |

All times are GMT -4. The time now is 01:57. |