]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
Comment the output strategy when using the new time stepping.
authorkronbichler <kronbichler@0785d39b-7218-0410-832d-ea1e28bc413d>
Tue, 28 Oct 2008 14:33:16 +0000 (14:33 +0000)
committerkronbichler <kronbichler@0785d39b-7218-0410-832d-ea1e28bc413d>
Tue, 28 Oct 2008 14:33:16 +0000 (14:33 +0000)
git-svn-id: https://svn.dealii.org/trunk@17368 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/examples/step-31/step-31.cc

index dcbdedafeea26166002081175e6bd138e340a1cc..3724149038de823b341aa64fb3a7ea1784df95f0 100644 (file)
@@ -2427,6 +2427,19 @@ void BoussinesqFlowProblem<dim>::output_results ()  const
                                   // the relation between global vector and
                                   // local dofs looks like on the present
                                   // cell, which concludes this tedious work.
+                                  // 
+                                  // There's one thing worth remembering
+                                  // when looking at the output: In our
+                                  // algorithm, we first solve for the
+                                  // Stokes system at time level <i>n-1</i>
+                                  // and then for the temperature at time
+                                  // level <i>n</i>. These are the two
+                                  // components we join for output, so what
+                                  // one is going to look at has this
+                                  // little misalignment. Since output is
+                                  // only a qualititative mean anyway, we
+                                  // can ignore this $\mathcal{O}(h)$
+                                  // error.
   {
     std::vector<unsigned int> local_joint_dof_indices (joint_fe.dofs_per_cell);
     std::vector<unsigned int> local_stokes_dof_indices (stokes_fe.dofs_per_cell);

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