COMSOL Blog

What’s coming in Particle Tracing for 4.3

April 10, 2012

by Phil Kinnane

It’s been fun working with the next release. One of the great new features will be in the Particle Tracing Module and will allow particles to interact with each other, and not only with the macroscopic field they find themselves in. It also produces some pretty cool vids.

Galaxy Video, COMSOL Multiphysics v4.3

This educational tutorial model shows how to add customized particle-particle interaction forces, which in this example are the gravitational force between 2500 stars in a galaxy. The galaxy initially rotates as a rigid body, then begins to change shape due to the gravitational forces. While there aren’t many galaxies with just 2500 stars out there, this academic example will be great for getting you all up and working with particle-particle interaction forces.


Comments (4)

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Bob Weggel
April 17, 2012

Please keep me posted. My interest is in the interaction between magnetic particles whose magnitude and direction of magnetization depends on a magnetic field generated largely by external sources but also by the particles themselves.

Phil Kinnane
April 18, 2012

Hi Bob,

You can already do this using the Auxiliary Dependent Variable feature. This will also be what you would use in the next version.

Mojtaba Nasiri
August 6, 2012

Hi
How can I input initial position and velocity of three interacting particles. I can’t do this by “mesh based” option.
for example the initial positions are: (-1,0),(1,0) and (0,1)
thanks

Phil Kinnane
August 7, 2012

Hi Mojtaba,

I’m not an expert in the subject, but I belive you can use the “Release From Grid” feature. Otherwise, please contact support@comsol.com

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