On 07 Feb 2014, at 19:45, Johannes Ackva <[email protected]> wrote:
> Hello Jean-Pierre and Christophe, > > Jean-Pierre, yes Your Plot shows as max the maximum nodal value. And I > verified now that this can be shown be using the "Adapt visualisation > grid". > > Christophe, > thank You for Your background information. Let me please pose a next > question: How can it be judged which is the true max value? And what > does it mean if the max-values from different approximations are so > different (194 vs 240): Mesh not fine enough? Or elm quality bad? Or both? > It's not a problem: it's just that the maximum of a second order polynomial interpolated with Lagrange functions is not necessarily at one of the interpolation nodes. Consider a second order line element [0,1] with a middle node at 0.5. Assign values 1, 2 and 2 at the 3 nodes. The maximum is not 2 - but 2.125 (between the middle and the right node). +----+-----+ 0 0.5 1 > thank for very much, Best regards, Johannes_ACKVA > > > www.code-aster.de > > On 07/02/14 17:12, jean pierre aubry wrote: >> with quadratic element >> is not it that? >> enclosed pic >> >> Adapt visualization grid > <Screenshot.png><bado_segment45_post.resu>_______________________________________________ > gmsh mailing list > [email protected] > http://www.geuz.org/mailman/listinfo/gmsh -- Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
