On Wed, 12 Nov 2008, Vijay M wrote:
>>> For example when I have an unstructured grid, and when I coarsen >>> uniformly twice and refine uniformly twice, would I get the exact >>> same mesh?! >> >> No. For instance, the second mesh above is a uniform coarsening (so >> far as such a thing exists) of the first mesh, but uniformly refining >> it will produce two new elements that weren't in the first mesh. > > I do not understand this. I thought you maintained the level number for each > element and so once I specify an initial mesh, all elements in it are > treated as level_0. Now if I refine it once, all new elements get the > level_1 flag and become active while the original elements still are in > memory but inactive. And now if I coarsen the mesh uniformly, then the > level_1 elements become inactive and level_0 elements become active. > > Isn't this how the refine-coarsen methodology implemented ? Or am I way off > in my understanding ? That's exactly how refine-coarsen is implemented, and refine*N followed by coarsen*N will always give you the same mesh. But coarsen*N followed by refine*N will not. Again, take a look at mesh 2 in my last email to see why. --- Roy ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
