Menu

Discussion Forum

New Discussion
Filtrer

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 The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Laser engraving - mesh solution

Posted 23 janv. 2019, 15:29 UTC−5 Heat Transfer & Phase Change Version 4.2a 4 Replies

Manuel Flury
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

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 janv. 2019, 08:43 UTC−5
Manuel Flury
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 25 janv. 2019, 16:28 UTC−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

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 25 janv. 2019, 17:10 UTC−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

-------------------
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
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 30 janv. 2019, 08:34 UTC−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

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 30 janv. 2019, 08:43 UTC−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

-------------------
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

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content