Analysis of entropy generation in biomimetic electroosmotic nanofluid pumping through a curved channel with Joule dissipation

Narla, VK, Tripathi, D and Beg, OA ORCID: 2020, 'Analysis of entropy generation in biomimetic electroosmotic nanofluid pumping through a curved channel with Joule dissipation' , Thermal Science and Engineering Progress, 15 , p. 100424.

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Biomimetic designs are increasingly filtering into new areas of technology in recent years. Such systems exploit characteristics intrinsic to nature to achieve enhanced adaptivity and efficiency in engineering applications. Peristaltic propulsion is an example of such characteristics and in the current article it is explored as a feasible mechanism for deployment in electrokinetic pumping of nanofluids through a curved distensible conduit as a model for a bioinspired smart device. The unsteady mass, momentum, energy and nanoparticle concentration conservation equations for a Newtonian aqueous ionic fluid under an axial electrical field are formulated and simplified using lubrication approximations and low zeta potential (Debye H¨uckel linearization). A dilute nanofluid is assumed with Brownian motion and thermophoretic body forces present. The reduced non-dimensional conservation equations are solved with the symbolic software, Mathematica 9 via the NDSolve algorithm for velocity, temperature, nano-particle concentration distributions for low zeta potential. An entropy generation analysis is also conducted. The influence of curvature parameter, maximum electroosmotic velocity (Helmholtz-Smoluchowski velocity), inverse EDL thickness parameter, zeta potential ratio and Joule heating parameter on transport characteristics is evaluated with the aid of graphs and contour plots. Temperature profiles are elevated with positive Joule heating and reduced with negative Joule heating whereas the opposite behaviour is observed for the nano-particle concentrations.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Thermal Science and Engineering Progress
Publisher: Elsevier
ISSN: 2451-9049
Related URLs:
Depositing User: OA Beg
Date Deposited: 23 Sep 2019 12:53
Last Modified: 16 Feb 2022 02:47

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