Flow between parallel porous slabs and transport - Select Physics

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Hello,

I am trying to simulate the flow of a gas mixture in such a way that - the gas mixture flows in a channel, - then is in contact with the slabs of porous medium, - then flow between parallel slabs of porous medium, - finally exiting into a channel without any porous medium.

I have attached a figure to illustrate this.

I would like some help clarifying if I should set up the physics as a combination of "Transport of Dilute Species in Porous Media (tds)" and "Free and Porous Media Flow, Brinkman (fp)"? Or, "Transport of Dilute Species (tds)" and "Free and Porous Media Flow, Brinkman (fp)"?

Thank you.



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