]> https://gitweb.dealii.org/ - dealii.git/commitdiff
Discuss one other point.
authorWolfgang Bangerth <bangerth@math.tamu.edu>
Sun, 24 Apr 2011 18:56:01 +0000 (18:56 +0000)
committerWolfgang Bangerth <bangerth@math.tamu.edu>
Sun, 24 Apr 2011 18:56:01 +0000 (18:56 +0000)
git-svn-id: https://svn.dealii.org/trunk@23642 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/examples/step-46/doc/intro.dox

index 33688de8ff7df5ae8332aa0d7e341e978e2e2a2c..e1c4cccf964786e1e8a2bd5e94f93e63e7a4323c 100644 (file)
@@ -428,6 +428,15 @@ We will consider the following situation as a testcase:
 
 @image html step-46.layout.png
 
+As discussed at the top of this document, we need to assume in a few places
+that a cell is either entirely in the fluid or solid part of the domain and,
+furthermore, that all children of an inactive cell also belong to the same
+subdomain. This can definitely be ensured if the coarse mesh already
+subdivides the mesh into solid and fluid coarse mesh cells; given the geometry
+outlined above, we can do that by using an $8\times 8$ coarse mesh,
+conveniently provided by the GridGenerator::subdivided_hyper_rectangle
+function.
+
 The fixed boundary at the bottom implies $\mathbf u=0$, and we also
 prescribe Dirichlet conditions for the flow at the top so that we get
 inflow at the left and outflow at the right. At the left and right

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