Search found 196 matches

by Franz Pichler
02 Feb 2016, 15:10
Forum: HPC
Topic: Multithreading
Replies: 1
Views: 7095

Multithreading

Hi everybody, i was wondering if there is an example of the omp capabilities within elmer. Or is there even an overview somehwere. When i interpret the code fragments throughout the solvers in the rigth way then: 1)for now the multithreading is applied to matrix assembly only 2) the multithreading i...
by Franz Pichler
02 Feb 2016, 13:01
Forum: Updates
Topic: Elmer version 8.1. is out
Replies: 5
Views: 11950

Re: Elmer version 8.1. is out

Hello, i would like to contribute to the GPU discussion above. The solver package "paralution", that works on many backlends including GPUs, has an explicit elmer interface. Do you guys know about that? i didnt try it out with elmer . But the solver itself is fast and handy. best regards F...
by Franz Pichler
26 Nov 2015, 12:27
Forum: ElmerSolver
Topic: Matrix Entry that belongs to two partitions
Replies: 1
Views: 1697

Matrix Entry that belongs to two partitions

Hello, we are facing an issue with matrix entries that should connect two nodes that might possibly be part of different partitions. My questions are: 1) Generally, is the whole system matrix accesible in parallel? In other words can i somehow acces entry i,j where i is the global row of a node (its...
by Franz Pichler
06 Nov 2015, 14:29
Forum: ElmerSolver
Topic: Higher order Elements
Replies: 0
Views: 2205

Higher order Elements

Hello dear Elmer Community, i have questions regarding the use of higher order elements. THe situation is the following: the mesh is created with salome and consists of linear tets and wedges. The wedges form a boundary layer at the boundary of concern. i would like to use the "Element=p:2"...
by Franz Pichler
04 Nov 2015, 17:25
Forum: ElmerSolver
Topic: Question about dBasisdx
Replies: 6
Views: 3775

Re: Question about dBasisdx

hi peter, i actually want to set a constraint to a bc flux that is dependent on some variables Think of poissons equation. The flux "permittivity \nabla phi" at the boundary is equivalent to the charge at the bc. And in many situations this charge has to be equivalent to the charge in the ...
by Franz Pichler
04 Nov 2015, 16:34
Forum: ElmerSolver
Topic: Question about dBasisdx
Replies: 6
Views: 3775

Re: Question about dBasisdx

Thanks for the reply to this. Can anybody think of a way how i can evaluate the parent element gradients on the boundary elements gauss points? i can always get teh parent element and evaluate the elementinfo on it but here i have the problem that again the gauss point local coordinates of the bc el...
by Franz Pichler
15 Sep 2015, 16:25
Forum: ElmerSolver
Topic: Question about dBasisdx
Replies: 6
Views: 3775

Question about dBasisdx

Hello deart Elmer community, i was wondering about the dBasisdx values, that most ElmerSolver get from the ElementInfo function as something like stat = ElementInfo( Element, Nodes, IP % U(t), IP % V(t), IP % W(t), detJ, Basis, dBasisdx ) . When i call this for a boundary element in a 3d simulation,...
by Franz Pichler
31 Aug 2015, 12:49
Forum: Bug reports
Topic: Problem with disjoint Subdomains in parallel
Replies: 0
Views: 3989

Problem with disjoint Subdomains in parallel

Hello, i think i found a bug when dealing with disjoint subdomains in parallel. I attach a minimal example to show the problem. In the example there is a box domain in which 10 non touching spheres are enclosed. I partitioned that with ElmerGrid and the "-metis 4 3" optiion. In the example...
by Franz Pichler
20 Aug 2015, 11:33
Forum: Software development
Topic: INclude Path for my Solvers
Replies: 1
Views: 3885

INclude Path for my Solvers

Hi there, i recently started to order my projects and i set up a nice little directory tree. ONe directory for solvers, one for UDF and another for sif files. Now, is there a way where i can tell the sif file to include a directory when it searches for the procedures? So that i dont have to give ful...
by Franz Pichler
13 Aug 2015, 18:11
Forum: ElmerSolver
Topic: Integral COnstraint for single Solver
Replies: 12
Views: 9785

Re: Integral COnstraint for single Solver

Okay also without using the invperm i managed to make this work sor a serial run. In parallel it doesnt do the same thing though. It runs through but somehow the integral condition has a wrong effect. so i add the entries for all partitions in row number one and i add to rhs entry number one. i am r...