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Meshing high aspect ratio geometry

Posted 5 mars 2021, 16:50 UTC−5 Mesh Version 5.5 3 Replies

Claire Cook
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I'm trying to mesh a geometry with a very high aspect ratio (see screenshot) with a vertical dimension ~1 km and horizontal dimension ~1000 km. There are two parts in the geometry, with the bottom one being a layer around 30 m thick. Both are made using point clouds from topography data. Normally I would use a swept mesh for a geometry with this kind of aspect ratio, at least for the lower layer, but I haven't been able to do that because of the shape of the boundary. I'd appreciate any recommendations on how to mesh this type of geometry.

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3 Replies Last Post 8 mars 2021, 17:05 UTC−5
Jeff Hiller COMSOL Employee

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Posted: 4 years ago 5 mars 2021, 17:20 UTC−5

Hi Claire,

It's a bit difficult to judge the shape of your geometry based on this image, but one idea would be to partition your geometry using something like an elliptical cylinder, chosen such that you can mesh the parts of your geometry inside that elliptical cylinder with a swept mesh while using an unstructured mesh on the periphery.

Jeff

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Jeff Hiller
Hi Claire, It's a bit difficult to judge the shape of your geometry based on this image, but one idea would be to partition your geometry using something like an elliptical cylinder, chosen such that you can mesh the parts of your geometry inside that elliptical cylinder with a swept mesh while using an unstructured mesh on the periphery. Jeff
Claire Cook
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Posted: 4 years ago 8 mars 2021, 16:56 UTC−5

Thanks for the idea. I think that would work for my purposes, except that I am getting an internal error in geometry decomposition/error in parameter domain topological analysis when I try to partition. Any ideas how to fix that?

Thanks for the idea. I think that would work for my purposes, except that I am getting an internal error in geometry decomposition/error in parameter domain topological analysis when I try to partition. Any ideas how to fix that?
Jeff Hiller COMSOL Employee

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Posted: 4 years ago 8 mars 2021, 17:05 UTC−5

Hi Claire,

I'd recommend you contact our support team ( www.comsol.com/support/ ) as this is straying too far out of my area of competency.

Best,

Jeff

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Jeff Hiller
Hi Claire, I'd recommend you contact our support team ( www.comsol.com/support/ ) as this is straying too far out of my area of competency. Best, Jeff

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