Analysis of double diffusive convection in electroosmosis regulated peristaltic transport of nanofluids

Abstract

In-depth understanding of flow and pumping characteristics of the nanofluids in a narrow fluidic channel is required for accurate control of micropumps. The present paper studies the nanofluids flow driven by the combined effects of peristaltic pumping and external electric field through microchannel. Double diffusive convection in nanofluids is examined. Buoyancy effects due to change in temperature, solute concentration and nanoparticle volume fraction are also taken into account. Poisson–Boltzmann, momentum, energy, solute concentration, and nanoparticle volume fraction equations are considered to govern the nanofluids flow. Governing equations are simplified under the lubrication theory and Debye-Hückel linearization. Influences of Joule heating, electric double layer thickness, electroosmostic velocity, Grashof numbers, thermophoresis and Brownian motion on flow characteristics, pumping characteristics, and skin friction coefficient are computed using Mathematica software. Trapping phenomenon is also examined under the effects of pertinent parameters. Present analysis reveals that flow characteristics and pumping characteristics improve with negative Joule heating effects. The findings of present analysis can be utilized in clinical implications like drug delivery systems, cell therapeutics, and particles filtrations etc.