From: wolf Date: Thu, 30 Jun 2005 23:42:09 +0000 (+0000) Subject: . X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=335079f5af64d2a120ccac26963667446802c8e6;p=dealii-svn.git . git-svn-id: https://svn.dealii.org/trunk@11028 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-18.data/results.html b/deal.II/doc/tutorial/chapter-2.step-by-step/step-18.data/results.html index 9847479b07..1c370070a4 100644 --- a/deal.II/doc/tutorial/chapter-2.step-by-step/step-18.data/results.html +++ b/deal.II/doc/tutorial/chapter-2.step-by-step/step-18.data/results.html @@ -12,7 +12,7 @@ reduced significantly, to about 23 minutes, a much more reasonable time.

If run, the program prints the following output, explaining what it is -doing all that time: +doing during all that time:

 examples/step-18> time make run
@@ -139,21 +139,21 @@ norm of the stress in the material):
 
 
-    
 
-    
 
-    
-    
 
-    
 
-    
+ Time = 2 + Time = 5 + @@ -162,21 +162,21 @@ norm of the stress in the material):
+ Time = 8 + Time = 9 + @@ -193,6 +193,9 @@ to the right). The model clearly does not provide for this (all our forces and boundary deflections are symmetric) but the effect is probably physically correct anyway: in reality, small inhomogeneities in the body's material properties would lead it to buckle to one side -to evade the forcing; in numerical simulation, small perturbations +to evade the forcing; in numerical simulations, small perturbations such as numerical round-off or an inexact solution of a linear system -by an iterative solver could have the same effect. \ No newline at end of file +by an iterative solver could have the same effect. Another typical source for +asymmetries in adaptive computations is that only a certain fraction of cells +is refined in each step, which may lead to asymmetric meshes even if the +original coarse mesh was symmetric.