particles under diffusion model?

Pled · September 28, 2018, 05:09

I want to model particles that are moving under a pure diffusion model.
Is that possible?

ghorrocks · October 2, 2018, 18:27

You can do a diffusion only additional variable. The additional variable can then represent the concentration of the particles.

If you want to do lagrangian particle tracking using only a diffusion model then you could probably hack the existing lagrangian model to do it - define a user drag law and set it to zero and replace it with a diffusion based model. Getting this to work might be tricky.

September 28, 2018, 05:09	particles under diffusion model?	#1
Pled Member Dimitrios S. P. Join Date: Jan 2018 Posts: 63 Rep Power: 8	I want to model particles that are moving under a pure diffusion model. Is that possible?

October 2, 2018, 18:27		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,781 Rep Power: 143	You can do a diffusion only additional variable. The additional variable can then represent the concentration of the particles. If you want to do lagrangian particle tracking using only a diffusion model then you could probably hack the existing lagrangian model to do it - define a user drag law and set it to zero and replace it with a diffusion based model. Getting this to work might be tricky. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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