On Wed, May 15, 2013 at 3:54 PM, lorenzo alessio botti < [email protected]> wrote:
> I'm pretty sure that the geometry approximation is responsible of the > convergence degradation. I've experienced this problem with the ringleb > flow (2D Euler) using inviscid wall bcs. If you do p refinement instead of > h refinement you should see that the entropy error actually stagnates and > you get almost zero convergence. This is due to the error in the geometry > representation. Imposing the bcs on the approximated geometry according to > the exact solution of the ringleb flow allows to recover optimal > convergence rates. The geometry approximation error is neglected. > Unfortunately I don't think that the bump has an exact solution, does it? > Otherwise you could try this way. > Hi Lorenzo, Thanks for sharing your experience in this area. The bump does not have an exact solution, so this approach will be difficult. I did put together the ringleb case, so I will experiment with your suggestion. Manav ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
