On 7/29/25 22:52, Md Mahmudul Islam wrote:
Thanks a lot, Professor, for your kind reply again. I have checked the block
sparsity pattern but couldn't find any issue. It is identical to step-55 in my
code. Professor, my problem is uncertainty quantification with time-dependent
NSE. I have checked if I keep the assembly system as it is, like step-55 it
runs. So, I think my problem is in assemble system or inside run.
Well, yes, of course. In your assembly, you are apparently writing into more
matrix entries than step-55 does, but you have not previously told the
sparsity pattern that you want to write into these entries. That can have two
reasons:
* You really *do* want to write into these entries, but you have not allocated
these entries in the sparsity pattern.
* You *mistakingly* write into these entries.
I don't know which it is -- you will need to figure out in which specific ways
the assembly you perform is different from the one in step-55, for example by
isolating the terms you have added, and thinking about their correctness.
Best
W.
--
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 visit
https://groups.google.com/d/msgid/dealii/5d729117-818c-40e5-ba1f-ec949a9876c5%40colostate.edu.
