On 2/25/22 19:44, Ali Seddiq wrote:
Thank you for your reply. In order to reconstruct the following final
discretized form as
(M+A)u + A'p=F+G,
a 2*2 matrix is subdivided into blocks in a way that (block)components (0,0)
and (1,1) are M+A and A' respectively and components (0,1) and (1,0) set to zero.
Solution vector is declared as a BlockVector but contains/subdivided into two
scalar components u and p. Right hand side is also a BlockVector containing
F_u and G_p.
I hope I could have addressed your point here. Would you please advise me if
there are any discrepancies in my structuring?
I have no idea. The error message says
You are providing a matrix whose subdivision into blocks in either row or
column direction does not use the same block sizes as the solution vector or
right hand side vectors, respectively.
You need to find out why that is so. Some debug output right before you call
MatrixTools::apply_boundary_values() will be able to tell you whether the
error message is correct or not. If the error message is correct, you ought to
find out why the subdivision is how it is.
Best
W.
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