Hi, there!
I have a question concerning the use of the function
apply_boundary_values():
MatrixTools::apply_boundary_values(boundary_values,
system_matrix,
solution,
system_rhs);
Iteration is used to find a numerical solution. We know that
system_matrix is independent of the iterate and remains unchanged during
the iteration
system_rhs depends on the iterate so it changes during the iteration
Below is the pseudo-code of the program.
initialize iterate u;
assemble system_matrix; //Just once
assemble system_rhs; //1st time
call apply_boundary_values(); //Apply bdry 1st time
while ( not converged ) {
solve FEM to get new iterate u;
assemble system_rhs; // repeated
call apply_boundary_values(); // repeated
}
My question is: will the repeated call to function apply_boundary_values()
inside the loop
alter the system_matrix that is meant to be constant (independent of
iterate u)?
If the answer is no, then the above code will be fine, I guess.
If the answer is yes, I guess I'll need to assemble system_matrix inside
the loop repeatedly
even though it is independent of the iterate u.
Thanks for any assistance.
--
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see
https://groups.google.com/d/forum/dealii?hl=en
---
You received this message because you are subscribed to the Google Groups
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to dealii+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/dealii/89a815ca-65e9-48ba-a5f2-76ddcf0848b5o%40googlegroups.com.
