Sorry, it’s me agin. It is a continuous question based on my last post , I have now fix the issuse with assembling the vector, now there is not error reported when I run the program. But I meet another problem: the solver gives me different solution when work in parallel. Since this doesn’t happend…

As I just posted in the other post, you need to use a function with the MPC function space to store your solution, if you want back-substitution to work properly, for the same reason of using the MPC function space for the RHS vector.

DOLFINX_MPC produce different results when work in parallel

dolfinx

tuderic January 9, 2024, 7:58am 6

Is it possible that your problem is also related to this post? In my case, the slave DOFs are also not updated by the backsubstitution process.

Topic		Replies	Views
Running dolfinx on parallel processors dolfinx	6	857	April 20, 2022
MPC backsubstitution in parallel dolfinx mpi , dolfinx_mpc	28	503	January 9, 2024
Problem with dolfinx_mpc when assemble vetors in paraller dolfinx assembly , mpi	5	133	January 7, 2024
MPI performance question dolfinx	1	452	May 12, 2022
Problem running complex dolfinx demo in parallel General dolfinx , mpi	2	102	March 4, 2024

DOLFINX_MPC produce different results when work in parallel

Related Topics