On 2/24/23 05:22, 'yy.wayne' via deal.II User Group wrote:
I use trilinos because MatrixFree method relys on LinearAlbegra::distributed
Vector or Block Vector.
When solve the coarsest level of MatrixFree multigrid problem directly,
trilinos direct solver only
handles non-blocked vectors, so I do transfer between BlockVectors and
Vectors. The ordering of
DoFs is destructed when fe degree rises to 3 and higher, causing the transfer
error.
The problem with renumbering by component is that the DoFs owned by each
process are no longer a contiguous range, and that just isn't allowed by the
vector class you are trying to use. It needs to be a contiguous index range.
If you need to copy from block vectors to non-block vectors, you might just
have to copy in a way that doesn't just map from src[i] to dst[i], but from
src[i] to dst[mapping[i]] where mapping takes care of the translation of
corresponding vector elements.
Best
W.
--
------------------------------------------------------------------------
Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
--
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 [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/dealii/1bb5fe65-4eea-55f8-2d73-b3d98a14514e%40colostate.edu.
