Re: [deal.II] shape function gradient at arbitrary points in the element

2022-07-06 Thread Wolfgang Bangerth
On 7/5/22 09:28, Simon Wiesheier wrote: What is the approach to achieve this? My only idea is to create a new FEValues object for each quadrature point and pass an appropriate Quadrature object. But seems to be very inefficient. This is basically what the VectorTools::point_value() and

Re: [deal.II] discretization of a analytical function on a second triangulation

2022-07-06 Thread Wolfgang Bangerth
On 7/6/22 01:02, Simon Wiesheier wrote: Basically, my motivation to call VectorTools::interpolate is to compute the nodal values (scalar field --> DOFs) in the triangulation based on the formula implemented in the just derived class. During the assembly routine, I access some interpolated

Re: [deal.II] error: installation of dealii using spack

2022-07-06 Thread Jean-Paul Pelteret
Hi Simon, Daniel is right — only Sundials versions 5 through 5.8 are compatible with deal.II 9.3.2, while Sundials 6 is compatible with 9.3.4 onwards. This is in fact what is stated in the Spack package, so I don’t quite know how it is that you’re able to get this mixed configuration:

Re: [deal.II] discretization of a analytical function on a second triangulation

2022-07-06 Thread Daniel Arndt
Simon, if you get all information you need using VectorTools::interpolate then this sounds good. Note that there also is FEFieldFunction( https://www.dealii.org/current/doxygen/deal.II/classFunctions_1_1FEFieldFunction.html ) that implements the interpolation for you. Best, Daniel On Wed, Jul

[deal.II] deal.II Newsletter #218

2022-07-06 Thread 'Rene Gassmoeller' via deal.II User Group
Hello everyone! This is deal.II newsletter #218. It automatically reports recently merged features and discussions about the deal.II finite element library. ## Below you find a list of recently proposed or merged features: #14101: Vector tools project 1 (proposed by gfcas)

Re: [deal.II] error: installation of dealii using spack

2022-07-06 Thread Daniel Arndt
Simon, It looks like all the errors are related to the Sundials dependency (release 6.0.0). Looking at https://github.com/dealii/dealii/pull/13918, it seems that you need the latest deal.II release (9.4.0) to support that Sundials version. If you don't anticipate needing it I would just turn the

[deal.II] Re: error while installing dealii using candi

2022-07-06 Thread Bruno Turcksin
Hello, This error often happens when you don't have enough memory to compile the program. Try using only one or two cores. Best, Bruno On Wednesday, July 6, 2022 at 4:01:45 AM UTC-4 me20...@iittp.ac.in wrote: > Dear all, > please find the error attached. > > thank you in advance.[image:

Re: [deal.II] discretization of a analytical function on a second triangulation

2022-07-06 Thread Simon Wiesheier
Dear Daniel, yes, I defined a class derived from deal::Function and it seems to work for me. Basically, my motivation to call VectorTools::interpolate is to compute the nodal values (scalar field --> DOFs) in the triangulation based on the formula implemented in the just derived class. During