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Diffusion and Porous Media

Question asked by Martin Rommel on Nov 1, 2014
Latest reply on Nov 4, 2014 by Jared Conway

Hi

 

I'm trying to do two things in the simulator:

 

1. Simulate the diffusion of oxygen through a piece of liver tissue which is suspended in the middle of a flow stream, see picture. My question is can the simulator handle this? I have modeled the tissue as a isotropic porous media, which has a porosity of 0.4. However, I am a bit in doubt about what I need to specify as the length and area of this media. Would that simply be (a) the area of the front section and the length of the entire slice along the flow or (b) is it the total surface area of the slice and the length along the flow direction?

Also can the simulator handle tortuosity and permeability?

 

Liver chip.png

 

2. Simulate the diffusion of Oxygen and CO2 through a thin PDMS membrane into a fluid flow above it, see figure. Basically the question is the same as my first one. What would I specify as area and lengths, if I considered the thin gas permeable PDMS membrane to be a isotropic porous media?

 

Gas System.png

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