Transverse transport of solutes between co-flowing pressure-driven streams for microfluidic studies of diffusion/reaction processes
| dc.creator | Salmon, Jean-Baptiste | |
| dc.creator | Ajdari, Armand | |
| dc.date | 2007-02-01 | |
| dc.date.accessioned | 2026-07-07T07:55:26Z | |
| dc.date.available | 2026-07-07T07:55:26Z | |
| dc.description | We consider a situation commonly encountered in microfluidics: two streams of miscible liquids are brought at a junction to flow side by side within a microchannel, allowing solutes to diffuse from one stream to the other and possibly react. We focus on two model problems: (i) the transverse transport of a single solute from a stream into the adjacent one, (ii) the transport of the product of a diffusion-controlled chemical reaction between solutes originating from the two streams. Our description is made general through a non-dimensionalized formulation that incorporates both the parabolic Poiseuille velocity profile along the channel and thermal diffusion in the transverse direction. Numerical analysis over a wide range of the streamwise coordinate $x$ reveal different regimes. Close to the top and the bottom walls of the microchannel, the extent of the diffusive zone follows three distinct power law regimes as $x$ is increased, characterized respectively by the exponents 1/2, 1/3 and 1/2. Simple analytical arguments are proposed to account for these results. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0702023 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0702023 | |
| dc.identifier | J. Appl. Phys. 101, 074902 (2007) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/126965 | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Transverse transport of solutes between co-flowing pressure-driven streams for microfluidic studies of diffusion/reaction processes | |
| dc.type | text |