]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
Fix sign errors
authorbangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Sat, 28 Oct 2006 13:14:46 +0000 (13:14 +0000)
committerbangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Sat, 28 Oct 2006 13:14:46 +0000 (13:14 +0000)
git-svn-id: https://svn.dealii.org/trunk@14116 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/examples/step-21/doc/intro.dox

index 74167d099ac6f7c1e2c40c4b64c3c660aa79ffca..f165ed298f02d378a272965325def32ebebacbf6 100644 (file)
@@ -181,10 +181,10 @@ Note that in the first term, we have to prescribe the pressure $p^{n+1}$ on
 the boundary $\partial\Omega$ as boundary values for our problem. $\mathbf n$
 denotes the unit outward normal vector to $\partial K$, as usual.
 
-For the saturation equation, we obtain
+For the saturation equation, we obtain after integrating by parts
 @f{eqnarray*}
   (S^{n+1}, \sigma)_\Omega
-  +
+  -
   \triangle t 
   \sum_K
   \left\{
@@ -199,7 +199,7 @@ Using the fact that $\nabla \cdot \mathbf{u}^{n+1}=0$, we can rewrite the cell
 term to get an equation as follows:
 @f{eqnarray*}
   (S^{n+1}, \sigma)_\Omega
-  +
+  -
   \triangle t 
   \sum_K
   \left\{
@@ -284,6 +284,7 @@ B_{ij} &=&
 (\nabla \cdot \mathbf v_i, \phi_j)_\Omega,
 \\
 H_{ij} &=&
+  -
   \sum_K
   \left\{
   \left(F(S^n) \mathbf v_i, \nabla \phi_j)\right)_K

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