Hi Franz,
thanks for the tip. I could find some info on that and was able to do the experiment. Thanks again. Maybe next version of the Models Manual would include some documentation on Heat Gap.
Search found 63 matches
- 21 Jun 2013, 14:01
- Forum: ElmerSolver
- Topic: Modeling Surface Roughness for Heat Transfer
- Replies: 5
- Views: 3838
- 21 Jun 2013, 10:29
- Forum: ElmerSolver
- Topic: Modeling Surface Roughness for Heat Transfer
- Replies: 5
- Views: 3838
Re: Modeling Surface Roughness for Heat Transfer
Hi Franz,
thanks for the suggestion. I've looked in the Elmer Models Manual, and could not find anything about 'Heat Gap" (the phrase does not exist, and gap is used only in solving thin channel flows). Could you elaborate a bit on this? Thanks.
thanks for the suggestion. I've looked in the Elmer Models Manual, and could not find anything about 'Heat Gap" (the phrase does not exist, and gap is used only in solving thin channel flows). Could you elaborate a bit on this? Thanks.
- 20 Jun 2013, 15:04
- Forum: ElmerSolver
- Topic: Modeling Surface Roughness for Heat Transfer
- Replies: 5
- Views: 3838
Modeling Surface Roughness for Heat Transfer
I am conducting a set of simulations in which different materials are used to spread the heat from a heat source. I have the physical measurements to compare the simulations against. Some experiments have some adhesive between the spreader and the plastic body in which the temperature is measured, a...
- 06 Sep 2012, 18:52
- Forum: ElmerSolver
- Topic: Incompressible vs. Perfect Gas Air Models
- Replies: 0
- Views: 2221
Incompressible vs. Perfect Gas Air Models
I'm running a CFD simulation on a system consisting of a few solids immersed in a box of air. There's a slow airflow through the box; some of the solids consume power. Elmer solves both the Heat equation and Navier-Stokes. I'm having problems with how the properties of Air are defined. If the materi...
- 14 Aug 2012, 00:59
- Forum: ElmerSolver
- Topic: Discrepancy in results based on air flow direction
- Replies: 0
- Views: 2265
Discrepancy in results based on air flow direction
I'm trying to simulate some 3D models of electronic components. One of the test cases is to have a small PCB board with a single component on top; the component should running pretty hot, at about 150C (based on measurements on the actual component). The simulation I'm using is creating the PCB and ...
- 09 Nov 2011, 18:51
- Forum: External tools
- Topic: Defining faces as physical surfaces in Salome
- Replies: 20
- Views: 23647
Re: Defining faces as physical surfaces in Salome
Hi Mike, I'm attaching the script that exports a mesh to Gmsh .msh format. The script also includes the parts that import the geometry, mesh it and declare groups based on it -- I haven't tested the export part without these steps, so thought it would be safer to include them too. As I've mentioned,...
- 02 Nov 2011, 11:53
- Forum: External tools
- Topic: Defining faces as physical surfaces in Salome
- Replies: 20
- Views: 23647
Re: Defining faces as physical surfaces in Salome
Hi Mike, The script is not a very general Salome -> .msh translation. I'm pretty much assuming that the mesh consists only of triangles for faces and of tets for volumes, and that each face and volume is a group (or, in Gmsh parlance, physical faces and physical volumes). For my purposes, this suffi...
- 27 Oct 2011, 21:15
- Forum: External tools
- Topic: Defining faces as physical surfaces in Salome
- Replies: 20
- Views: 23647
Re: Defining faces as physical surfaces in Salome
Hi Peter, one more result that might help you with debugging the UNV import. I've written a custom .msh mesh exporter to write the Salome mesh in Gmsh format, which can then be read by ElmerGrid. The exporter is a Salome script which works with Salome's internal data structures and not with any expo...
- 24 Oct 2011, 23:57
- Forum: External tools
- Topic: Defining faces as physical surfaces in Salome
- Replies: 20
- Views: 23647
Re: Defining faces as physical surfaces in Salome
Hi Peter, I found something that could be the issue. I've been looking through the source code (in release/6.0/elmergrid/src) at file femfilein.c, line 3964: /* should this be physical property or material property? */ data->material[noelements] = physind; OK, so first I've modified it to be matind ...
- 24 Oct 2011, 17:00
- Forum: External tools
- Topic: Defining faces as physical surfaces in Salome
- Replies: 20
- Views: 23647
Re: Defining faces as physical surfaces in Salome
Hi Matthias, Yes, the Windows version is not very stable, that's why we're considering using virtual Linux boxes on top of our Windows OS's to run Salome. As for identifying common faces/edges, Salome has the partition algorithm in there, that can identify these common faces -- after that, the mesh ...