I am new at this forum and also a beginner in using elmer. I am sorry, if this question has been asked already before by someone else, but with the search function I could not find a matching topic. I try to simulate the heat transfer from an LED to a cool body and then finally to the outer air. For the cool body I changed the existing example in elmer a little bit and "placed" a LED on top of the cool body. The LED should represent body 2 and the cooler body 1. Unfortunetly because of this body 2 is now set as a small area around the cooler and LED at the position of the LED as one can see in the attached picture, which seems to be a general problem with extruded objects. Is there any possibility to avoid this and shrink body 2 only to the LED. I also attached my code in this topic.
Thank you very much in advance!
Kind regards!
- led_cooler.png (141.97 KiB) Viewed 328 times
- Code: Select all
***** ElmerGrid input file for structured grid generation *****
Version = 210903
Coordinate System = Cartesian 3D
Subcell Divisions in 3D = 11 3 17
Subcell Sizes 1 = 0.15 0.2 0.15 0.2 0.05 0.05 0.05 0.2 0.15 0.2 0.15
Subcell Sizes 2 = 0.025 0.3 0.7
Subcell Sizes 3 = 0.1 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.025 0.05 0.025 0.2 0.1 0.2 0.1 0.2 0.1 0.2 0.1
Material Structure in 2D
2 0 2 0 2 2 2 0 2 0 2
1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 0 3 0 0 0 0 0
End
!Geometry Mappings
! mode line limits(2) Np params(Np)
! -1 1 0.15 0.2 4 0.3 0.0 1.0 -0.1
! -1 3 0.15 0.2 4 0.3 0.0 1.0 -0.1
! -1 5 0.15 0.2 4 0.3 0.0 1.0 -0.1
! -1 7 0.15 0.2 4 0.3 0.0 1.0 -0.1
! -1 9 0.15 0.2 4 0.3 0.0 1.0 -0.1
! -1 11 0.15 0.2 4 0.3 0.0 1.0 -0.1
!End
Materials Interval = 1 4
Extruded Structure
! 1stmat lastmat newmat
1 2 1
1 1 1
1 2 1
1 1 1
1 2 1
1 1 1
1 2 1
1 1 1
1 2 1
1 3 2
1 2 1
1 1 1
1 2 1
1 1 1
1 2 1
1 1 1
1 2 1
1 1 1
1 2 1
End
Boundary Definitions
! type out int double of the boundaries
1 -1 1 1
2 -3 1 1
2 -2 1 1
2 -4 1 1
3 0 2 1
4 1 2 1
5 -1 3 1
5 -2 3 1
5 -3 3 1
5 -4 3 1
End
Numbering = Horizontal
Element Degree = 1
Element Innernodes = False
Surface Elements = 2000
Minimum Element Divisions = 2 2 2