Dear Friends,

I am trying to compute the ringleb flow which is purely subsonic . The inlet corresponds to an isovelocity line ( q=0.3)and outlet to the symmetry axis. However, I seem to have some problems with the boundary conditions, specifically at the outlet. The flow is determined by streamlines k=0.5 and k=0.8. With adaptation, the solution is deteriorating.

Can you please advise on the bc's for this problem. I have referred to Esser's paper, Coiriers's thesis and AGARD report of Chiocchia. I need the BC s for the problem in details.

As of now, the inlet and outlet BC s are Reimann invariants wherein the exact solution is supplied as the missing state. The wall BC s are pressure extrapolation or mirror b.c. . I have experimented by using the Reimann Solver instead of Reimann invariant also at both inlet and outlet, as wellas invariant at the inlet and solver at the outlet.

Please advise on the BC s and issues regarding initialistaion, if any.

Thanks

Ganesh

You may want to look at the boundary condition implementation in the NSC2KE code.

http://pauillac.inria.fr/cdrom/prog/unix/nsc2ke/eng.htm

Regards.

[2012ZGZYY]

does anyone has solutions or open source code?