From: bangerth Date: Mon, 26 Sep 2011 19:36:36 +0000 (+0000) Subject: A few more sentences. X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=410849b52ef632e7090c20b90d5075b620d8d2cf;p=dealii-svn.git A few more sentences. git-svn-id: https://svn.dealii.org/trunk@24440 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/examples/step-32/doc/intro.dox b/deal.II/examples/step-32/doc/intro.dox index 4adc763805..7c13ac30e2 100644 --- a/deal.II/examples/step-32/doc/intro.dox +++ b/deal.II/examples/step-32/doc/intro.dox @@ -701,7 +701,15 @@ The setup for this program is mildly reminiscent of the problem we wanted to solve in the first place (see the introduction of step-31): convection in the earth mantle. As a consequence, we choose the following data, all of which appears in the program in units of meters and seconds (the -SI system) even if we list them here in other units. +SI system) even if we list them here in other units. We do note, +however, that these choices are essentially still only exemplary, and +not meant to result in a completely realistic description of +convection in the earth mantle: for that, more and more difficult +physics would have to be implemented, and several other aspects are +currently missing from this program as well. We will come back to this +issue in the results section again, but state for now that providing a +realistic description is a goal of the Apect code in +development at the time of writing this. As a reminder, let us again state the equations we want to solve are these: @f{eqnarray*} @@ -735,9 +743,6 @@ the following quantities: GridGenerator::hyper_shell() function, and we use a HyperShellBoundary objects for the inner and outer boundary. - These two %numbers also provide us with the lengthscale $L$ we need for the - pressure scaling. We choose $L=R_1-R_0$. -
  • At the interface between crust and mantle, the temperature is between 500 and 900 degrees Celsius, whereas at its bottom it is around 4000 degrees Celsius (see, for example,