deal.II User Group

Dear all, I've got multigrid solver matrix-free for FSI in ALE formulation. For deforming grid I

On 4/26/20 4:53 PM, Michał Wichrowski wrote: > I've just looked through the possible solution

On Wednesday, March 11, 2020 at 7:36:31 AM UTC-4, Michał Wichrowski wrote: I tried to fix that by

Maxi, it would likely be interesting to run the STREAM benchmark on these two systems to see how much

Currently gather_evaluate is a replacement for the combination of read_dof_values() and evaluate(),

Found a bug in the library, reported here: https://github.com/dealii/dealii/issues/9405, and

Found my mistake, I was iterating over the wrong things. Am Sonntag, 19. Januar 2020 14:54:16 UTC+1

For approximating the inverse mass matrix I followed step-48 with some modifications: In the reinit-

Dear Martin, I get the meaning, you are right. And in this case if VectorizedArrayType

And your suggestion to compare the diagonal is quite helpful, as inverse_entries is protected one may

Dear Michal, Thanks for reporting this problem - this is indeed a bug. It seems we did not think

Dear Michal, To answer the first request, we can provide an iterator from `MatrixFree` via `

So you want to a separate function that calls the current interface with default constructed

Dear Michal, Great. I've opened issue https://github.com/dealii/dealii/issues/8460 for that to

Following step-37 I tried to extend it for non-linear equations, using a jacobian approximation for

Found my mistake, I forgot to call mg_transfer.build(dof_handler); before doing anything with it. Am

I found my mistake, I could not reuse the same partition for the main matrix and the MG-matrices,

Hei, based on what I know from literature a GMG-preconditioner with Chebyshev smoothing should work

Thus I intended to use a GMG-preconditioner, with a Chebyshev-smoother. Usually the GMG-

> Would that work together with the GMG-preconditioner? You mean you want to use the linear

Steve, On Wednesday, February 6, 2019 at 2:49:26 PM UTC-5, Stephen DeWitt wrote: The one area that I

Bruno and Martin, Thank you for your responses. I'll try to get a CUDA version of step-48 up and

On 10/25/2018 05:23 AM, Michał Wichrowski wrote: > > I think the documentation of arpack solver

The effect described in the paper looks indeed similar, thanks for the hint. Am Mittwoch, 2. Mai 2018

Hi Maxi, To build on what Daniel said in the other thread: This function was written with the intent

ps I can confirm that using reinit() which takes vectors of DoFHandlers and Constraints solved the

Thanks Daniel for pointing me to this! On Sat, Dec 9, 2017 at 9:05 AM, Daniel Arndt <daniel.arndt@

Dear Martin, Thank you for your quick reply. I understand my mistake now- the issue stems from "

Dear Stephen, You are absolutely right, the value of dofs_per_cell is simply wrong in the vector-

Dear Martin, I finally managed to make it work by following Your idea. Thanks! Michał