COMSOL - Preventing a moving mesh from stretching in COMSOL simulation

[Steradiant]

TL;DR Summary

In the tutorial for modeling the induced current from a moving magnet, the mesh in the moving domain stretches. How can I prevent this for bigger displacements?

Hello,

I followed the following example for modeling the induced current from a moving magnet in a coil https://www.comsol.com/support/lear...-from-Moving-a-Magnet-Through-a-Coil-9871/112
If I have a bigger model with a bigger displacement of the magnet, I can imagine that the stretching of the mesh can get disadvantageous. How can I prevent this stretching? E.g. Re-Mesh after some timesteps or some kind of periodic meshing? Or I could also imagine a adaptive mesh refinement for each time step (or something like that).

 

[Future Bruno]

Thank you in advance.It is possible to use re-meshing at certain intervals or use an adaptive meshing scheme when modeling the induced current from a moving magnet in a coil. Re-meshing involves remeshing the domain after a certain number of time steps, while adaptive meshing can dynamically refine the mesh in areas of rapid change.In addition, you can also use a structured mesh instead of an unstructured mesh to reduce stretching. This can be done by setting up a Cartesian mesh with a grid spacing that is suitable for your problem. Structured meshes are better suited for problems involving high velocities or large displacements since they are more efficient in terms of memory usage and computation time. Finally, you can also use symmetry or other geometric simplifications to reduce the amount of mesh elements needed for the simulation. This can be done by taking advantage of the symmetry of your model, or by using a surface mesh to represent the curved surfaces of the coil. We hope this information helps. If you have any other questions, please do not hesitate to contact us.