I need to perform particle tracking due to magnetic field. My magnet has a remanant flux density of 1.5 in x,y,z direction. Particles has relative permeability of 4.1.

I am using

1. Magnetic filed no current

2. Laminar flow

3. Particle tracing for fluid flow modules in order.

I am doing the simulation using comsol. I want to increase the magnetic field area because of the permanent magnet used in the study so that I can study how particles are getting attracted towards magnet. I want it to cover the entire airway. But I am unable to do it. Please help.

Also, for particles I am giving magnetophoretic force. Please look into my case. It will be a great help.

I am uploading the drive link for my entire case.I am attaching screenshot for reference. The blue circle indicates where I want my magnetic filed to be. Rectangular portion is magnet.

https://drive.google.com/drive/folders/15JLjKLno-xKdx9Sox_LUoR8VPJm_dPjI?usp=sharing

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