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Fusion plasma in comsol
Posted 22.10.2023, 15:32 GMT-4 Electromagnetics, Plasma Physics, Geometry Version 6.1 2 Replies
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I've just started using COMSOL and I'm struggling to create a simulation of a plasma inside a magnetic field. I'm trying to simulate a stellerator, but I've realized how difficult it is to create a 3D mobius strip in COMSOL so im just focucing on simulating a single part of the mobius strip. However, I'm really struggling to configure the plasma into a mobius strip and then surround it with superconducting magnets to simulate magentic confinement in a stellerator. Also, I will confugure the magnets in different ways to find the the most effective configuration but I just do not know how to start. Please help.
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A comment: I think that if I was just starting to use Comsol Multiphysics, one of the last things I would seek to model, as a beginner, would be a stellarator! Unless there is an existing stellerator (or similar) example Comsol application already available to you to work from and modify, then I advise that you start your modeling work by preparing/understanding much simpler models that are relevant to your eventual goal, ensuring that you understand what you are doing and that you can learn key lessons and work through the pitfalls along the way, as you become more skilled. For example, geometry-wise, maybe model a simple straight solenoid, then perhaps try a torus, and then (maybe) a stellerator magnetic field configuration, but all without a plasma. Then, separately, maybe do some plasma modeling in simple geometries variously without any magnetic field, with an applied magnetic field (but a simpler one than a stellerator), etc. Are you doing this in time domain? If so, make sure you become comfortable doing simpler time-domain models of EM fields and plasmas, in 2D and 3D. There are some articles on the Comsol Blog that you may find helpful: https://www.comsol.com/blogs/mits-psfc-designs-a-tokamak-to-survive-plasma-disruptions/ and https://www.comsol.com/blogs/analyzing-a-component-of-the-iter-tokamak-with-simulation/ p.s. It isn't very difficult to make a simple mobius geometry (at least, if that was all you needed). See: https://www.comsol.com/community/exchange/982/ . But I think your challenge is much greater than that. One step at a time. Good luck!
-------------------Scientific Applications & Research Associates (SARA) Inc.
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Hi Akeeb,
Robert's feedback is great. Only mentioning the magnetic field, before entering into the complicated shapes of a stellarator, you may want to study the Helmholtz coil model example. From there you get to other resources that are of primary interest. Possibly, these training resources regarding AC/DC are great : select electromagnetics and have a look to everything that refers to coils.
Best of luck!
Eric Favre
Renaissance Fusion
Eric Favre
Renaissance Fusion