<font face="Vorgabe Sans Serif,Verdana,Arial,Helvetica,Sans-Serif" size="2">Dear Duners,<br><br>in order to implement boundary conditions for a multiphase formulation in Dune-pdelab,<br>I have to use strongly and weakly fulfilled boundary conditions. I implemented the weak<br>Dirichlet-bc in the alpha_boundary method by extracting them from a boundary function. <br><br>My question now is: How can I take the strong Dirichlet bc from another bc- function <br>into account? I thought, I should use them in the solver call "apply", but I can't use <br>only the strong bc, because I have to consider the structure of the GridFunctionTree, <br>is that right?<br>In other words: How can I combine strongly and weakly fulfilled Dirichlet bc in my set <br>of boundary conditions in order to pass it to the apply method of the solver?<br><br>Thanks in advance, <br>Christian Simon<br><div></div></font>