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particle diffusion with wall interactions

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Old   December 1, 2020, 11:34
Default particle diffusion with wall interactions
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I am working on a problem in which nanoparticles diffuse in a channel while having van der waals interactions with the channel wall. should I use the species transport model and use combine a UDF to include particle wall forces,
or can I use a UDF with the DPM model without using the species transport model?

Please suggest a method.
These are polystyrene particles are in a liquid medium.
I am already working on a UDF to include particle wall interactions with DPM model, where particles are given a velocity to flow through the channel.

But instead of that, I need to make particles flow through the channel via diffusion. I want to include a body force to the diffusing particles.
How can I do that?

Thank you!
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body force, diffusion, species model

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