Search found 20 matches

by aminer2k
22 Feb 2012, 02:01
Forum: ElmerSolver
Topic: Multiple Domains with different physics: multimesh?
Replies: 3
Views: 1876

Re: Multiple Domains with different physics: multimesh?

Looking further at this problem, it looks like the approach used in the Elmer Tutorial "Thermal Flow in Curved Pipe" is a better way to approach my problem. In this tutorial there are two domains, the fluid and the pipe wall. the HeatSolver solves heat transfer in the pipe, and both the HeatSolver a...
by aminer2k
15 Feb 2012, 01:58
Forum: ElmerSolver
Topic: Multiple Domains with different physics: multimesh?
Replies: 3
Views: 1876

Multiple Domains with different physics: multimesh?

Hello, I am having trouble building a test case to look at solving two domains, with different physics being solved in each. The first domain is just HeatSolver (Temperature), the second domain uses a solver solving Temperature and Potential. I have been using the test case "multimesh" as a guide. m...
by aminer2k
11 Feb 2012, 01:57
Forum: External tools
Topic: quadratic elements from Salome to Elmer
Replies: 0
Views: 1563

quadratic elements from Salome to Elmer

Hello, I've invested a quite a bit in using Salome for geometry and meshing, but have generally exported linear elements to Elmer via a UNV file format and a ElmerGrid conversion. Now, I need to use p-elements (which I think is the same as what Salome calls quadratic elements). I can find no way to ...
by aminer2k
04 Feb 2012, 03:54
Forum: ElmerSolver
Topic: FluxSolver results
Replies: 0
Views: 1037

FluxSolver results

Hello, I am getting results from FluxSolver that I can not improve. I have a very simple example problem where there is fixed temperatures on both sides of a block. The block has cubes of metal on both ends (1x1x1mm) and a block of low thermal conductivity material in the middle. The ends are fixed ...
by aminer2k
28 Dec 2011, 09:51
Forum: ElmerSolver
Topic: Navier Stokes Convergence issues
Replies: 1
Views: 1578

Navier Stokes Convergence issues

Hello, I would like to perform analysis using Navier Stokes and Heat Transfer eventually. As a first step, I set up some tests by just solving the fluid portion of the problem. I am finding it very difficult to get a problem to converge. Generally, I am finding that simple geometries with structured...
by aminer2k
26 Aug 2011, 06:00
Forum: ElmerSolver
Topic: poor convergence with flux solver
Replies: 3
Views: 802

Re: poor convergence with flux solver

Hello, Thank you for the suggestions. I tried the settings for the solver that you recommended, but without a positive result. I am solving the heat equation using a heat source, h, then finding the flux of Temperature. When I turn off h, or significantly reduce the magnitude of h, the flux solver w...
by aminer2k
25 Aug 2011, 03:38
Forum: ElmerSolver
Topic: poor convergence with flux solver
Replies: 3
Views: 802

poor convergence with flux solver

I am calculating the electric field from the electrical potential using fluxsolver. It has very poor convergence. I simplified the model to only about 85 volumes, but the convergence is worse. Solver section: Solver 2 # solve for E field, from the flux of the potential E=-flux(phi) Exec Solver = alw...
by aminer2k
12 Aug 2011, 04:30
Forum: ElmerSolver
Topic: Access to material properties in Body Force section
Replies: 2
Views: 1064

Re: Access to material properties in Body Force section

I may have found an approach that works. In order to get access to the material properties as regular variables elsewhere in the .sif, it looks like I need to run 'SaveScalars' ' SaveMaterials' solver first. It looks like this evaluates any material property listed there, and sets it as a nodal vari...
by aminer2k
12 Aug 2011, 00:45
Forum: ElmerSolver
Topic: Access to material properties in Body Force section
Replies: 2
Views: 1064

Access to material properties in Body Force section

Hello, I am having trouble finding out how to use material properties, such as density within the .sif file section 'Body Force'. For example to apply a heat source when using HeatSolve, the heat source h should be in units of W/kg. I would like to apply my user heat source A, with units of W/m^3, b...
by aminer2k
10 Aug 2011, 18:41
Forum: ElmerSolver
Topic: Coupling thermal and electrostatic solver
Replies: 2
Views: 628

Re: Coupling thermal and electrostatic solver

Thank you for your guidance on adding a fluxsolver and using the divergence solver. I will look into that, and repost progress. Yes, I agree that it seems to make better sense to make a modified solver. I'd like to try that, but it seems beyond my programing skills right now. Basically, the governin...