On Wed, Apr 27, 2016 at 3:46 PM, Pepijn Kessels <[email protected]> wrote:
> Hi there, > > I'm trying to import a structured mesh for the 2D backward facing step > problem given on the nasa site. I transformed the original plot3d format > into exodus format using paraview. I could import the mesh into libMesh > without problems, but I ran into some issues when trying to run a > simulation. > > The problem is that the mesh is comprised of 4 subdomains and they are not > stitched together, but seen as seperate entities. I read somewhere on the > forum that if the nodes on the boundary exactly overlap (which they do) > they should automatically be stitched together. I also tried to manually > stitch the seperate subdomains together using "stitch_meshes" , but this > did not work either as it did not find any nodes on the boundary. I suppose > my problem is that boundary information is missing on this mesh. Is there > a(n) (easy) way to fix this, such that the 4 subdomains are seen as one > domain? > This could be caused if there are duplicate nodes in the Exodus file... then find_neighbors() won't detect them as actually being neighbors because there will be an infinitely thin "slit" between them. There's a utility [0] you can use to see if this is the case. [0]: https://gist.github.com/jwpeterson/7a36f9f794df67d51126 As far as stitching the meshes together goes, I don't think this will work if there are no sidesets in the Exodus mesh. It's possible the conversion from plot3d -> Exodus dropped these somehow. -- John ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
