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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Laser engraving - mesh solution

Posted 23.01.2019, 15:29 GMT-5 Heat Transfer & Phase Change Version 4.2a 4 Replies

Manuel Flury
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We are interested to re-create the example visible in the link : https://www.comsol.com/paper/comsol-assisted-simulation-of-laser-engraving-7574 But we do not understand to implement the moving mesh to see the engraving effect. Can we have any suggestions ? We use Comsol 4.2a

Thanks a lot

4 Replies Last Post 30.01.2019, 08:43 GMT-5
Manuel Flury
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Posted: 6 years ago 25.01.2019, 16:28 GMT-5

We verify some information about moving mesh : it seems that it is well known in the litterature. But can we have an example or simple tutorial to understand how to implement with the case of laser engraving ? Thanks a lot

We verify some information about moving mesh : it seems that it is well known in the litterature. But can we have an example or simple tutorial to understand how to implement with the case of laser engraving ? Thanks a lot
Jeff Hiller COMSOL Employee

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Posted: 6 years ago 25.01.2019, 17:10 GMT-5

Hello Manuel,

This blog post on thermal ablation should help get you on the right track. Unfortunately the files are not available in version 4.2a, so hopefully you can update your installation.

Best,

Jeff

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Jeff Hiller
Hello Manuel, This [blog post on thermal ablation](https://www.comsol.com/blogs/modeling-thermal-ablation-for-material-removal/) should help get you on the right track. Unfortunately the files are not available in version 4.2a, so hopefully you can update your installation. Best, Jeff
Manuel Flury
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Posted: 6 years ago 30.01.2019, 08:34 GMT-5

Dear Jeff Hiller, We try to implement your example in Comsol 4.2 : Modeling Thermal Ablation for Material Removal, due to our experience in this version. In the case of 1D, it works, and we obtain the same results as in the blog.

We try in the case of 2D axis symetric, but we have problem of convergence, for example inversed mesh. The consequence is the apparition of corrugation on the surface, and not apparition of ablation. What are the parameter of the solver to obtain convergence ? Hoping for your help, I think this topic can be helpful for many case.

Dear Jeff Hiller, We try to implement your example in Comsol 4.2 : Modeling Thermal Ablation for Material Removal, due to our experience in this version. In the case of 1D, it works, and we obtain the same results as in the blog. We try in the case of 2D axis symetric, but we have problem of convergence, for example inversed mesh. The consequence is the apparition of corrugation on the surface, and not apparition of ablation. What are the parameter of the solver to obtain convergence ? Hoping for your help, I think this topic can be helpful for many case.
Jeff Hiller COMSOL Employee

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Posted: 6 years ago 30.01.2019, 08:43 GMT-5

Hello Manuel,

We have released 12 versions since 4.2a, with many improvements to the solvers. It is unfortunately not clear whether you could make that model converge by simply tweaking settings in 4.2a.

My recommendation would be that you update your installation to 5.4.

Best regards,

Jeff

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Jeff Hiller
Hello Manuel, We have released 12 versions since 4.2a, with many improvements to the solvers. It is unfortunately not clear whether you could make that model converge by simply tweaking settings in 4.2a. My recommendation would be that you update your installation to 5.4. Best regards, Jeff

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