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Closed system ---> Column + Vessel
Posted 2018年6月29日 GMT-4 11:59 0 Replies
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Dear All,
I would like to created a system where I have a vessel that introduces a chemical species in a saturated column and the output of this chemical species at the column is reintroduce into the vessel. In order to do that I define in COMSOL:
1) A "Transport of Diluted Species in Porous Media" physic (tds) 2) A Global ODEs and DAEs (Vessel) (ge)
I am not sure if for creating the vessel, a global ODEs and DAEs physic is the best, but for me it looks appropriate.
In order to couple them, as boundary condition of my tds physic I will put (ge.variable), and in the ODEs and DAEs physic (ge) I need to solve the following ode:
du/dt = Konstant*(ceffluent - u)
where u is the concentration of the species in the vessel, and ceffluent would be the concentration at the end of the column. The only problem is that I am not completely sure how to define ceffluent, I have tried with tds.c(0.1) but it does not work, actually tds seems to not be adeaquated.
Any help or suggestion with the problem?
Thank you
Best regards, Dani
Hello Daniel Jara Heredia
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