Has anyone done any MMS verification on cubic hermite convergence rates? I thought they were supposed to be O(h^4).... but we're only seeing O(h^2) on a fairly simple 2D poisson problem with an assumed solution of u=sin(8*pi*x).
We started investigating this because we were doing some comparisons between linear lagrange, second order lagrange and cubic hermites.... and the second order lagrange were both faster and more accurate than the cubic hermites! This was on a fourth order Cahn-Hilliard like system (we were using a split method with the lagrange basis). This was pretty surprising to me so we went to verify that we were getting the proper convergence rates on a simple problem... and.... we're not! Any ideas? Derek ------------------------------------------------------------------------------ Simplify data backup and recovery for your virtual environment with vRanger. Installation's a snap, and flexible recovery options mean your data is safe, secure and there when you need it. Data protection magic? Nope - It's vRanger. Get your free trial download today. http://p.sf.net/sfu/quest-sfdev2dev _______________________________________________ Libmesh-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-devel
