Stacked multi-cuboid geometries with PDE Toolbox for thermal analysis
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With the PDE Toolbox, I know that I can use the multicuboid function to create a stack of cuboids for thermal analysis, each with their own thermal characteristics. However, it appears that each of the resulting cuboids must have the same width and height as all other cuboids in the stack. To more accurately represent a power semiconductor that I am analyzing, each cuboid would ideally have a different size (thickness, width, and depth). Is it possible to create such a geometry?
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Alan Weiss
2017-12-12
No, you can currently create a stack of cuboids only with the same width and depth. They can have different thicknesses, as in this example.
Alan Weiss
MATLAB mathematical toolbox documentation
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Alan Weiss
2017-12-12
Sure. Export STL geometry from a CAD program, then import it to your model.
But if you are asking if there is another way in PDE Toolbox, the only thing I can think of is to make 3-D geometry from a point cloud, though I am not 100% sure that this will be satisfactory.
Alan Weiss
MATLAB mathematical toolbox documentation
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Svetlana Pease
2017-12-12
编辑:Svetlana Pease
2017-12-12
Hi David,
You can define a multi-cellular geometry by importing it from an STL file only if the cells are not connected. The last example here shows a multi-cellular geometry imported from STL. In all other cases importGeometry creates one cell.
Regards,
Svetlana Pease
MathWorks Documentation Group
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Giulia Ulpiani
2019-7-23
Hey David, I have the same issue in my current project. Did you solve it somehow?
Thank you,
Giulia
David Naviaux
2019-12-26
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Erebros
2021-3-10
Good morning,
I am having the same issue than you have. I reduced a 3D process to a 2D model due to the symmetry in the z-axis (cylindrical coordinates). Unfortunately I have multiple areas which are directly in contact with each other. If I define the first geometry everything works just fine. But by adding the other geometries the program adds the cross-sectional areas of the two geometry in such a way, that I end up with only one structure containing the combined surface of both geometries. This is unfortunately not acceptable due to the differences in material properties.
Is there any chance that you resolved the problem in another way?
If I find a solution/workaround to this problem I will let you know.
Best regards,
Erebros
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