Update GMRES/MLMG interface #3779
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
Depend on #3778 |
WeiqunZhang
force-pushed
the
curl_curl_gmres
branch
3 times, most recently
from
c31cd7f to
274f9ef
Compare
WeiqunZhang
force-pushed
the
curl_curl_gmres
branch
3 times, most recently
from
342b0bc to
3b97b9e
Compare
For the curl curl test, if beta = 1e-9 alpha/dx^2, the multigrid solver is able to reduce the residual by 10 orders of magnitude in 10 v-cycles. But for beta = 1e-14 alpha/dx^2, the multigrid solver's residual will stall at about 5e-6 of the original residual. However, it can be solved using GMRES with multigrid as a preconditioner.
WeiqunZhang
force-pushed
the
curl_curl_gmres
branch
from
3b97b9e to
0638721
Compare
atmyers
approved these changes
Mar 3, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
For the curl curl test, if beta = 1e-9 alpha/dx^2, the multigrid solver is able to reduce the residual by 10 orders of magnitude in 10 v-cycles. But for beta = 1e-14 alpha/dx^2, the multigrid solver's residual will stall at about 5e-6 of the original residual. However, it can be solved using GMRES with multigrid as preconditioner.