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Modeling magnetic nano-particles in a fluid

Posted 2010年9月16日 GMT-4 09:33 Fluid & Heat, Microfluidics, Chemical Reaction Engineering, Materials Version 4.3b 2 Replies

Ori Cohen
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Hi all,

We wants to model magnetic nano-particles in a fluid (fluid velocity is 0).

We don't know which model to choose in the model navigator, and how to create a nano-particles.

Thanks
2 Replies Last Post 2014年8月22日 GMT-4 16:00
COMSOL Moderator

Hello Ori Cohen

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If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Atiye Yousefi
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Posted: 1 decade ago 2013年7月24日 GMT-4 05:53
Hi Ori
I'm modeling cancer treatment with magnetic nano particles in comsol, and I'm having the same problem you had.
I was wondering if you'd found out what model to use, I'd be glad if I receive your answer

Thanks a lot.

Atiye Yousefi
Hi Ori I'm modeling cancer treatment with magnetic nano particles in comsol, and I'm having the same problem you had. I was wondering if you'd found out what model to use, I'd be glad if I receive your answer Thanks a lot. Atiye Yousefi
Saeid Movahed
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Posted: 1 decade ago 2014年8月22日 GMT-4 16:00
Hi, I have the same problem as yours. I want to simulate the concentration variation of nano-particle in a micro-fluid channel under magnetic field, I have built a modeling including transport of diluted species , laminar flow and magnetic field . I want to solve step1: stationary magnetic field and then step2: time dependent laminar flow and transport of diluted species. step1 solved good but I have an error in step2 . Nonlinear solver did not converge.
Maximum number of Newton iterations reached.
There was an error message from the linear solver.
The relative residual (0.33) is greater than the relative tolerance.
Time : 0
Last time step is not converged.
Anyone got a solution?
Hi, I have the same problem as yours. I want to simulate the concentration variation of nano-particle in a micro-fluid channel under magnetic field, I have built a modeling including transport of diluted species , laminar flow and magnetic field . I want to solve step1: stationary magnetic field and then step2: time dependent laminar flow and transport of diluted species. step1 solved good but I have an error in step2 . Nonlinear solver did not converge. Maximum number of Newton iterations reached. There was an error message from the linear solver. The relative residual (0.33) is greater than the relative tolerance. Time : 0 Last time step is not converged. Anyone got a solution?

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