Search found 215 matches

by mark smith
10 Jan 2017, 18:43
Forum: ElmerSolver
Topic: Degenerate 2D elements, GMSH mesh
Replies: 29
Views: 18469

Re: Degenerate 2D elements, GMSH mesh

Hi Mustafa,
Have you tried using only linear elements, set order 1 in gmsh?
Mark
by mark smith
06 Jan 2017, 15:21
Forum: General
Topic: paste squeeze simulation advice
Replies: 1
Views: 2313

paste squeeze simulation advice

Hi Elmer group, Referring to the image below maybe someone can offer advice on how to simulate the following 3D problem with Elmer (if possible) or any other tool they might know of that could do it. test_problem.png A bead or beads (even dots) of paste (properties known) of given thickness and shap...
by mark smith
16 Dec 2016, 14:40
Forum: Bug reports
Topic: elmergrid and gmsh format
Replies: 3
Views: 5001

Re: elmergrid and gmsh format

Hi Peter,
Thanks, when will this be available in the windows nightly build?
Best regards
Mark
by mark smith
14 Dec 2016, 20:29
Forum: Bug reports
Topic: elmergrid and gmsh format
Replies: 3
Views: 5001

elmergrid and gmsh format

Hi Elmer team I am evaluating pointwise as a mesher for use with Elmer and there is a small bug which the pointwise gmsh mesh throws. In the latest version of gmsh the mesh format allows the following (from section 9.1 of the Gmsh documentation) "Any section with an unrecognized header is simpl...
by mark smith
06 Dec 2016, 20:26
Forum: External tools
Topic: Using Dakota optimisation software with Elmer
Replies: 0
Views: 5072

Using Dakota optimisation software with Elmer

Hi All, I'm looking at trying to interface Elmer with Dakota https://dakota.sandia.gov/ and wondered if anyone else is using it who might be able to offer advice? I've already produced my own application that generates parameterized geometry using gmsh from a table of possible input parameters, mesh...
by mark smith
21 Nov 2016, 20:04
Forum: ElmerSolver
Topic: noslip wall BC not respected
Replies: 2
Views: 2878

Re: noslip wall BC not respected (solved)

Hi All, After scouring the forum I discovered that I needed to put the following line in the Simulation section of my sif file. Set Dirichlet BCs by BC Numbering = Logical True I cannot understand why this isn't the default as otherwise (as I found) the BC's at shared edges e.g. in cfd an inlet and ...
by mark smith
18 Nov 2016, 18:14
Forum: ElmerSolver
Topic: noslip wall BC not respected
Replies: 2
Views: 2878

noslip wall BC not respected

Elmer 8.2 Rev d3bf396 Windows mpi build Hi I have some 3D geometry built in Gmsh with a fluid volume with 2 rectangular inlets and 2 rectangular outlets. I put all the other fluid walls as noslip wall BC = True, the inlets have a uniform normal velocity applied, the outlets have zero pressure. When ...
by mark smith
17 Nov 2016, 21:15
Forum: ElmerSolver
Topic: savescalars format
Replies: 11
Views: 8337

Re: savescalars format

Hi Again, A similar problem is also the case for the mean temperature if you include Parallel Operator 1 = string sum, here you get the sum of the mean temperature of the surface in each partition and not weighted by the area of the surface in each partition ;-( I shall have to live with not using t...
by mark smith
17 Nov 2016, 18:48
Forum: ElmerSolver
Topic: savescalars format
Replies: 11
Views: 8337

Re: savescalars format

Hi Elmer team, When using save scalars with mpiexec & elmersolver_mpi and Parallel Reduce to get 1 output file then the following gives incorrect results in a thermal problem. Variable 1 = Temperature Operator 1 = "boundary min" UNLESS the boundary exists in all the partitions, if it d...
by mark smith
09 Nov 2016, 20:30
Forum: ElmerSolver
Topic: Elmer mesh quality
Replies: 1
Views: 2083

Elmer mesh quality

Hi Elmer team, Is there an Elmer tool that can determine the mesh quality of an Elmer mesh? I do my meshing with various tools (GID,Trelis,Comsol,GiD) and then export them in a convenient format then convert to Elmer format using Elmergrid. I am having convergence issues and NANs and wonder if it co...