From: Wolfgang Bangerth Date: Thu, 16 Dec 2010 21:42:39 +0000 (+0000) Subject: Explain what we are seeing. X-Git-Tag: v8.0.0~4674 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=245d3697500db2260c06b81611d6f04780ed32ee;p=dealii.git Explain what we are seeing. git-svn-id: https://svn.dealii.org/trunk@22985 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/examples/step-38/doc/results.dox b/deal.II/examples/step-38/doc/results.dox index 5e5bee9ba1..a3eda5aec0 100644 --- a/deal.II/examples/step-38/doc/results.dox +++ b/deal.II/examples/step-38/doc/results.dox @@ -20,8 +20,16 @@ H1 error = 0.00552639 @endverbatim This is what we expect: make the mesh size smaller by a factor of two and the -error goes down by a factor of four (***HM, SHOULDN'T IT BE A FACTOR OF -TWO???***) +error goes down by a factor of four (remember that we use bi-quadratic +elements). The full sequence of errors from one to five refinements looks like +this, neatly following the theoretically predicted pattern: +@verbatim +0.360759 +0.0888008 +0.0221245 +0.00552639 +0.0013813 +@endverbatim Finally, the program produces graphical output that we can visualize. Here is a plot of the results: