open TELEMAC-MASCARET The mathematically superior suite of solvers

hi,
i don't know the reason why there are two directions of velocity on the boundary.i think the direction should be the same. But why?

how can i solve this problem?
thank you !

Hello,

If you have a recirculation along one boundary, you can have different directions for velocity components, not surprising.

You can enlarge the extent of the domain not to have such phenomena (but perhaps quite farther).

Hope this helps,

Chi-Tuan