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how to assign conductivity to fluid flow in a microchannel preconcentration modeling?

Posted May 16, 2013, 1:14 p.m. EDT Low-Frequency Electromagnetics, Fluid & Heat, Computational Fluid Dynamics (CFD), Microfluidics, Porous Media Flow, Materials Version 4.3 1 Reply

Basant Giri
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I am modeling a solution phase preconcentration in microchannel. My system has two inlets and one outlet. From inlet1, buffer (10mM) containing a negatively charged dye is supplied and from inlet2 same buffer (but 100mM) is supplied with syringe pump . When electric field is applied (high voltage at inlet2 with inlet1 grounded ), I am expecting a preconcentration band at the boundary of fluids from two inlets (somewhere close to outlet). For this, I have combined three physics: momentum transport (laminar flow), mass transport (transport of diluted species) and
electric currents.

My question: how to connect/or assign electrical conductivity parameters to particular fluild flow (say from inlet1 and inlet2).

Any help will be appreciated. PS: I am a very beginer of COMSOL and any simulation projects. I am using COMSOL 4.3.
1 Reply Last Post May 27, 2013, 1:45 p.m. EDT
Basant Giri
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Posted: 1 decade ago May 27, 2013, 1:45 p.m. EDT
Here is the explanation of what I want to study. Please look at the schematics and its explanation. Looking forward to seeing some helpful insights.
Here is the explanation of what I want to study. Please look at the schematics and its explanation. Looking forward to seeing some helpful insights.

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