particles under diffusion model?

Pled · September 28, 2018, 06:09

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

ghorrocks · October 2, 2018, 19:27

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, 06:09	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, 19:27		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	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.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Discrete Element Method Collision Model	sfn	Fluent Multiphase	5	May 27, 2018 10:25
Overflow Error in Multiphase Modelling with Two Continuous Fluids	ashtonJ	CFX	6	August 11, 2014 15:32
UDF for Vapor Adsorption in the Solution Diffusion Model	Tomas C	System Analysis	0	August 4, 2014 11:35
Is diffusion is possible through VOF model of Fluent?	Blue	FLUENT	2	October 10, 2012 06:40
sediment scour model, scalars OR mass particles?	ati_ros61	FLOW-3D	0	October 12, 2009 06:41