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Scaling of geometry finalization

Posted 2013年10月29日 GMT-4 01:32 Geometry Version 4.3b 1 Reply

Campbell Scott
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I am running some large models that result in several thousand domains.
Geometry finalization (create union) can take over a day to complete.
I wonder what the scaling is here. How does the final geometry build time scale with the number of domains?
Does it matter that all of the geometry is guaranteed to be rectilinear? All boundaries are parallel to x,y,z axes.
Thanks, Campbell
1 Reply Last Post 2013年10月30日 GMT-4 04:32
Daniel Bertilsson COMSOL Employee

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Posted: 1 decade ago 2013年10月30日 GMT-4 04:32
The build time is larger than C*N^2, where N is the number of geometry objects. In the forthcoming release 4.4, we have improved the constant C in the case when the objects are disjoint (the code is about 5-10 times faster). The quadratic dependence on N holds both for planar and curved boundaries. We will continue to speed up this algorithm in future releases.

Best regards,
Daniel Bertilsson
COMSOL Development
The build time is larger than C*N^2, where N is the number of geometry objects. In the forthcoming release 4.4, we have improved the constant C in the case when the objects are disjoint (the code is about 5-10 times faster). The quadratic dependence on N holds both for planar and curved boundaries. We will continue to speed up this algorithm in future releases. Best regards, Daniel Bertilsson COMSOL Development

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