On Fri, Apr 17, 2020 at 1:58 PM Roberto Federico Ausas <rfausas@icmc.usp.br> wrote:
Hello, Thanks for your answer. The solution you provided worked.
Effectively, I was using Fenics, but then I needed to switch to firedrake because of the possibility of using Hermite elements to solve the structure part (a Kirchhoff beam). In the FSI interaction scheme I'm thinking, I will probably need a few dozens of variables belonging to R spaces (these essentially are the dofs associated with the beam problem). I hope the strategy you provided will work as well in such a case. Another difficulty I will face is that in order to construct the residual of my problem, I will need to integrate over the fluid and the beam meshes, the coupling being done through these Real space variables. A fully monolithic approach is probably out of question.
Hermite is certainly a way to go for beams, but have you looked at the Morley element? Thanks, Matt
Regards
On Fri, Apr 17, 2020 at 8:00 AM <firedrake-request@imperial.ac.uk> wrote:
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1. Issue solving problem involving function in R space (Roberto Federico Ausas) 2. Re: Issue solving problem involving function in R space (Patrick Farrell)
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Message: 1 Date: Fri, 17 Apr 2020 00:22:02 -0300 From: Roberto Federico Ausas <rfausas@icmc.usp.br> To: firedrake@imperial.ac.uk Subject: [firedrake] Issue solving problem involving function in R space Message-ID: < CAH6Ec4msgbi57NxOuLHB-W3LZm1yzhpa86DORwdobSWr2KmEUg@mail.gmail.com> Content-Type: text/plain; charset="utf-8"
Hello,
I need to solve a problem involving functions belonging to an R space.
For robustness, I need to use direct solvers for the linear part, but I'm getting the following:
ValueError: Monolithic matrix assembly is not supported for systems with R-space blocks.
Is there any way of doing this? Any help would be appreciated Regards
-- Roberto F. Ausas Instituto de Ci?ncias Matem?ticas e de Computa??o - ICMC/USP S?o Carlos, SP - Brasil *http://www.lmacc.icmc.usp.br/~ausas* < http://www.lmacc.icmc.usp.br/~ausas>