Re: [deal.II] Getting RHS values at nodes with DBC

As always there is a "deal.ii" way of doing the calculations. The FEValues::get_function_gradients() is actually what I needed. I got a little bit confused with the FEValues::get_normal_vectors(). This seems to return the normal direction of the face and doesn't give any further info about the

Re: [deal.II] Getting RHS values at nodes with DBC

Thank you for your feedback. I'll try to explain what I try to calculate with the help of a standard FEM textbook: [image: CaptureFEMbook.PNG] In the book the global system is partitioned so that the first row contains the known U1 dofs and the second row the unknown the dofs U2. They solve

Re: [deal.II] Getting RHS values at nodes with DBC

This is a year old post but I'm dealing with the same issue so I decided to continue here instead creating a new one. In my case I solve a simple laplace problem, that represent groundwater flow with non zero dirichlet boundary conditions My goal is to estimate how much water comes in and out

Re: [deal.II] Candi installation fail

No cmake finishes the configuration but the compilation breaks around 78%. It seems that the undefined references that break the process are related to boost iostream, which has failed the test -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see

Re: [deal.II] Candi installation fail

BOOST_SERIALIZATION_USABLE -- Performing Test BOOST_SERIALIZATION_USABLE - Success Any further help? Thank you Giorgos On Thursday, March 28, 2019 at 8:41:07 PM UTC-7, Wolfgang Bangerth wrote: > > On 3/28/19 7:12 PM, Giorgos Kourakos wrote: > > > ~/Documents/CODES/candi_Install/tmp/unpack

[deal.II] Candi installation fail

Hi all, I tried to compile dealii using candi distribution. Because I was getting several errors in the process from various packages, I ended up updating the versions of the following packages hdf5 -> 1.10.5 petsc -> 3.10.4 slepc -> 3.10.2 boost -> 1_69_0 However, during deal.ii compilation

[deal.II] Re: clarification on hanging nodes

That's very good to know Thank you On Saturday, October 13, 2018 at 6:06:25 AM UTC-7, Giorgos Kourakos wrote: > > Hi, I need a clarification about the hanging nodes. > > > At some point in my code I use > > mesh_constraints.resolve_indices(ids); which adds the constraints

Re: [deal.II] Non smooth solution when the BC coincide with the processors boundaries?

to the desired position. This simple trick works great so far. Kudos to whoever came up with that !! Giorgos On Thursday, February 15, 2018 at 3:54:03 PM UTC-8, Wolfgang Bangerth wrote: > > On 02/15/2018 04:48 PM, Giorgos Kourakos wrote: > > > > I haven't forgotten the Constraint

[deal.II] Non smooth solution when the BC coincide with the processors boundaries?

Hi deal.ii experts, I have the following issue and I'd like if you could give me directions what to look for. I'm attaching a figure from two consecutive iterations: The black line shows how the triangulation is split to different processors. The red line indicates a Dirichlet boundary

[deal.II] tests fail

Hi, I'm trying to compile a recent version of deal and I'm getting the following error during the tests as well as when I compile the step-1 ../../lib/libdeal_II.g.so.8.4.1: error: undefined reference to 'PCHYPRESetType' Any ideas what is wrong? thank you Giorgos -- The deal.II project