Explanation of "solve"function
Hello out there in the big OpenFOAMworld.
Is there anybody who can really explain to me the solvefunction? If I look at Code:
>solve(psiCmpt, sourceCmpt, cmpt);  But where is that solver really defined?  Where can i find the actual definition of the function "solve()"? And if there is somebody really knowing about that solvefunction:  Is there a way to call that solve() for a specific cell only? I am kind of lost with the C++ stuff or at least inside the structure of OpenFOAM, so any help is welcome! 
Hi Bernhard, did you find any information regarding the functionality of the solve() function? Thanks.

The solve function you are looking at is a virtual function ( http://foam.sourceforge.net/docs/cpp/a02380.html ) which is redefined for each solver (diagonalSolver, GAMGSolver, ...).
If you want to solve a linear system directly in a cell or a limited number of cells, you probably want to follow a simpler way. You can, for example, use a scalarSquareMatrix and use LU decomposition on it (OF can do it). 
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