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Moving heat source / Gaussian beam really in 2D? - Symmetry issues?

Posted 5 dic 2013, 08:01 GMT-5 Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Geometry, Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization Version 4.3b, Version 4.4 0 Replies

Christian
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Hi all,

I am aware that the Gaussian Beam/moving heat source issue has already been extensively discussed in the community and I have spent quite some time reading through the various posts. However, I am still not entirely confident about my conclusions and would like to get some feedback from the community.
Can I really model a moving Gaussian beam (surface or volume source, transient) in 2D?
If the source is fixed, no problem; 2D axis symmetry around the beam center that is clear. However, as soon as it is moving I am losing my 2D symmetry, right? So the model would have to be at least 3D symmetric with a symmetry plan defined by the beam axis and the direct of the (linear) motion of the beam, right? (By the way: How would I define this 3D symmetry in Comsol?)
That is at least what I am taking form previous posts and my understanding of how Comsol deals with symmetries/model dimensions.

www.comsol.com/community/forums/general/thread/14155
www.comsol.com/community/forums/general/thread/31787

One of the reasons why I am questioning my reasoning is because of some paper of past Comsol conferences that actually do a 2D model of a moving beam.

Any feedback on this issue would be greatly appreciated.

Best,
Christian
0 Replies Last Post 5 dic 2013, 08:01 GMT-5
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