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Irreversibility analysis of nanofluid flow induced by peristaltic waves in the presence of concentration‐dependent viscosity
Author(s) -
Akbar Y.,
Abbasi F. M.
Publication year - 2021
Publication title -
heat transfer
Language(s) - English
Resource type - Journals
eISSN - 2688-4542
pISSN - 2688-4534
DOI - 10.1002/htj.22133
Subject(s) - nanofluid , bejan number , thermophoresis , mechanics , brinkman number , buoyancy , viscosity , peristalsis , heat transfer , materials science , brownian motion , drag , thermodynamics , physics , chemistry , nusselt number , turbulence , reynolds number , biochemistry , quantum mechanics
The present study employs irreversibility analysis for the peristaltic movement of a nanofluid. The viscosity of the nanofluid is assumed to vary with the local concentration of colloidal particles. Impacts of thermophoresis, magnetic field, Brownian motion, Ohmic heating, viscous dissipation, and buoyant forces are considered in the flow analysis. Equations representing the flow and heat/mass transfer are prepared by employing Buongiorno's model for nanofluids. The lubrication approach is used to simplify the governing equations. The resulting system of differential equations is numerically solved with the aid of NDSolve in Mathematica. Results for entropy generation, Bejan number, velocity, temperature, and concentration are graphically presented. Outcomes show that entropy generation and temperature reduce by increasing the values of viscosity parameter. By increasing buoyancy forces due to temperature difference, the entropy generation increases, whereas the concentration profile shows a decreasing behavior. Maximum velocity reduces with an increment in the Hartman number.