On 4/15/23 22:31, Tao Jin wrote:
During a time interval, I want to use the first split operator
*A B * u1 = b1 *to solve*u1 *and*u2.*
*B C u2 b2*
Then, plug the solved u1 and u2 into the second split operator
*F * u3 = b3*
where *F* contains the information of the newly solved *u1* and *u2*.
You will want to look at how step-32 solves the coupled problem. There, it is
a time-dependent one where we first want to solve for the first two variables,
and then the third.
If F depends on u1 and u2, you will have to assemble that matrix separate from
the A,B,C matrices. In that case, you might also want to consider the approach
of step-31.
step-31 and -32 solve the same problem. It might be useful to compare and
contrast.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
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