Elmer Discussion Forum

Hey there, I am still working on some heat flux simulations. But I ran into an issue that I do not understand. I have defined a body that is used as a defined heat input area. This body is part of a larger body at room temperature for which I want to simulate the heat flow. In the first run I define...

Hey, you could try the heat gap functionality of Elmer. With this function, you can define a boundary surface as heat gap and define a heat transfer coefficient as equivalent for a thermal resistance. However, you cannot define a thickness as it is only a virtual "gap". There also some non...

Hi Peter, thanks for the comment on the discont-flag. The Mortar Boundary conditions are very interesting. I looked into them last week. However, a heat gap/thermal resistance at an interface seems to be quite diffucult to be simulated with that. I was just curious, since I wanted to improve my curr...

Thanks! Indeed, it means the boundary that should be meshed with a second pair of nodes to simulate the heat gap. Figured that by playing around with the index. The discont-option is required in case you have an interface between two materials that should be simulated with an thermal resistance diff...

Thanks, these groups of faces make the life a lot easier :) A played a bit with the discont-option of elmergrid. Could you explain what the integer behind that option controls? elmergrid 2 2 mesh -discont 1 or elmergrid 2 2 mesh -discont 3 It doesn't make any sense for me, because sometimes it works...

Thanks for the quick response. I would like to have a heat flow across the interface. The beam is heated and the cube should work as thermal mass to damp the heating effect. However, using the normal way I get a perfect heat transfer at the "inner" boundary between the beam and the cube. S...

Hi, I just started using elmer for some thermal problems. So far it is really awesome work. Thanks! My first simulations have been quite easy and have shown the correct result. Now I wanted to play a bit with the heat gap and the heat flow between two volumes. For this I've created a simple model th...