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Diffusion already progressed at time zero?

Posted Feb 28, 2018, 2:12 p.m. EST Computational Fluid Dynamics (CFD), Particle Tracing for Fluid Flow, Chemical Reaction Engineering 1 Reply

Jess M
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Hello,

We are trying to model simple diffusion through mulitiple layers. We set up our simulation with an intitial concentration only at a single surface. However, at time 0, there is some material that already appears to have diffused, with non-zero concentrations at areas beyond the resevoir. Does anyone have any advice as to how to resolve this? Thank you!

Jess

1 Reply Last Post Feb 28, 2018, 2:21 p.m. EST
Jeff Hiller COMSOL Employee

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Posted: 7 years ago Feb 28, 2018, 2:21 p.m. EST
Updated: 7 years ago Feb 28, 2018, 5:40 p.m. EST

See my post in this thread:

https://www.comsol.com/forum/thread/32944/calculated-initial-values-not-the-same-as-specified?last=2016-07-11T16:06:43Z

Best,

Jeff

-------------------
Jeff Hiller
See my post in this thread: https://www.comsol.com/forum/thread/32944/calculated-initial-values-not-the-same-as-specified?last=2016-07-11T16:06:43Z Best, Jeff

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