Effect of dispersion on the diffusion zone in two-phase laminar flows in microchannels |
| |
| Authors: | Debapriya Chakraborty Nilanjana Bose Sukanya Sasmal Swagata Dasgupta Tapas K Maiti Suman Chakraborty Sunando DasGupta |
| |
| Institution: | 1. Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur 721302, India;2. Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India;3. Department of Chemical Engineering, Indian Institute of Technology, Kharagpur 721302, India;4. Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India |
| |
| Abstract: | Aim of the present work is to investigate the reaction–diffusion process of a two species system under laminar flow in a T-shaped microchannel. A zone formed at the interface between the aqueous solutions of these two species is affected by advection and diffusion. Through theoretical analyses and experimental results, the effect of dispersion has been shown to influence this diffusion zone. We have defined a parameter called effective diffusivity, to account for the dispersion effects and observed it to be a function of the channel Peclet number. In the limiting case of low Peclet number, this parameter is constant and turns out to be equal to the molecular diffusivity. We have also related effective diffusivity and the dispersion coefficient through scaling estimates. |
| |
| Keywords: | Laminar flow Transverse diffusion Reaction Dispersion Peclet number Effective diffusivity |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
