Search found 4812 matches

by raback
06 Dec 2010, 00:45
Forum: General
Topic: Can I solve this with Elmer
Replies: 4
Views: 4168

Re: Can I solve this with Elmer

Hi, Unfortunately not. The little work on contact models has been experimental and limited in functionality. -Peter
by raback
04 Dec 2010, 02:10
Forum: ElmerSolver
Topic: Helmholtz solver excitation at selected node
Replies: 8
Views: 4894

Re: Helmholtz solver excitation at selected node

Hi Create a new BC section and instead of refering to "Target Boundaries" give "Target Coordinates". The closest node to the coordinate value will be chosen, for example Boundary Condition 7 Name = "FixedNode" Target Coordinates(1,3) = 1.2 2.3 0.0 Pressure 1 = Real 0.0 ...
by raback
02 Dec 2010, 18:15
Forum: External tools
Topic: Combination of .vtu results
Replies: 2
Views: 3649

Re: Combination of .vtu results

Hi

This should not be needed since many programs, such as Paraview and ViSit, can read the partitioned data. Just open the .pvtu file therein.

-Peter
by raback
02 Dec 2010, 13:47
Forum: ElmerSolver
Topic: Adaptive Timestepping
Replies: 9
Views: 9099

Re: Adaptive Timestepping

Hi I would never have found out by myself what you have suggested (timestepping method = explicit Euler - what is that, and why is it better here? etc. etc.). Time integration methods such as the explicit Euler are not limited to just to FEM. In fact in FEM the time discretization is the only one th...
by raback
01 Dec 2010, 19:26
Forum: Updates
Topic: Elmer channel on Youtube
Replies: 1
Views: 14047

Elmer channel on Youtube

Hi All, Just for the fun of it, there is now a youtube channel for Elmer movies. See http://www.youtube.com/user/elmerfem It's biassed towards some fresh developments on particle trackers but hopefully with time it will more representative to all the features of Elmer. If you have, or intend to put,...
by raback
01 Dec 2010, 10:55
Forum: ElmerSolver
Topic: Divergence (with NaN steps) for Navier-Stokes equation
Replies: 16
Views: 12984

Re: Divergence (with NaN steps) for Navier-Stokes equation

Hi About ElmerGrid and gmsh: If you do not use physical entities then by default the mesh is cleaned and renumbered. This means that the '-autoclean' flag is enforced. This is because the default numbering of geometric entities is not ideal for Elmer. Also gmsh does not seem to be consistant with th...
by raback
30 Nov 2010, 17:39
Forum: ElmerSolver
Topic: freesurfacesolver for droplet motion?!
Replies: 2
Views: 2007

Re: freesurfacesolver for droplet motion?!

Hi I think that your approach might be almost feasible. The thing that worries me little bit is the triple point where the plane, air and drop meet. If you use no-slip conditions for the velocity it will also fix the triple point (or line in 3d). Having a suitable slip coefficient might result to be...
by raback
30 Nov 2010, 17:25
Forum: ElmerSolver
Topic: Divergence (with NaN steps) for Navier-Stokes equation
Replies: 16
Views: 12984

Re: Divergence (with NaN steps) for Navier-Stokes equation

Hi, You should apply the "exec solver = never" to the k-epsilon solver, not to the flow solver. -Peter
by raback
30 Nov 2010, 17:16
Forum: ElmerSolver
Topic: Few question about convergence and preconditionals (ILU)
Replies: 2
Views: 2233

Re: Few question about convergence and preconditionals (ILU)

Hi Althenor 1) I created yesterday a subforum in which people can submit their cases of moderate size. One could place to look is the "tests" directory in your Elmer installation which includes around 140 minimalistic Elmer cases. 2) If you do *exactly* as in the tutorial there should not ...
by raback
30 Nov 2010, 17:09
Forum: ElmerSolver
Topic: Divergence (with NaN steps) for Navier-Stokes equation
Replies: 16
Views: 12984

Re: Divergence (with NaN steps) for Navier-Stokes equation

Hi

To remove the turbulence model say for the turbulence solver

Code: Select all

Exec Solver = never
Comment out the "Heat Condutivity Model" and "Viscosity Model", and set the tangential velocity components to zero.

-Peter