Electroosmotic flow of biorheological micropolar fluids through microfluidic channels

Chaube, MK, Yadav, A, Tripathi, D and Beg, OA 2018, 'Electroosmotic flow of biorheological micropolar fluids through microfluidic channels' , Korea-Australia Rheology Journal . (In Press)

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An analysis is presented in this work to assess the influence of micropolar nature of fluids in fully developed flow induced by electrokinetically driven peristaltic pumping through a parallel plate microchannel. The walls of the channel are assumed as sinusoidal wavy to analyze the peristaltic flow nature. We consider that the wavelength of the wall motion is much larger as compared to the channel width to validate the lubrication theory. To simplify the Poisson Boltzmann equation, we also use the Debye-Hückel linearization (i.e. wall zeta potential ≤ 25mV). We consider governing equation for micropolar fluid in absence of body force and couple effects however external electric field is employed. The solutions for axial velocity, spin velocity, flow rate, pressure rise and stream functions subjected to given physical boundary conditions are computed. The effects of pertinent parameters like Debye length and Helmholtz-Smoluchowski velocity which characterize the EDL phenomenon and external electric field, coupling number and micropolar parameter which characterize the micropolar fluid behavior, on peristaltic pumping are discussed through the illustrations. The results show that peristaltic pumping may alter by applying external electric fields. This model can be used to design and engineer the peristalsis-lab-on-chip and micro peristaltic syringe pumps for biomedical applications.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Korea-Australia Rheology Journal
Publisher: Springer
ISSN: 1226-119X
Depositing User: OA Beg
Date Deposited: 28 Feb 2018 14:04
Last Modified: 28 Feb 2018 16:43
URI: http://usir.salford.ac.uk/id/eprint/46155

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