Numerical study of electroosmosis-induced alterations in peristaltic pumping of couple stress hybrid nanofluids through microchannel

• Published in: Indian journal of physics Vol. 95; no. 11; pp. 2411 - 2421
• Main Authors: Tripathi, Dharmendra, Prakash, J., Gnaneswara Reddy, M., Kumar, Rakesh
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.11.2021; Springer Nature B.V
• Subjects: Astrophysics and Astroparticles; Drug delivery systems; Electroosmosis; Fluid flow; Grashof number; Mathematical models; Microchannels; Nanofluids; Nanoparticles; Nonlinear differential equations; Ohmic dissipation; Original Paper; Peristaltic pumps; Physics; Physics and Astronomy; Pumping; Resistance heating; Silver; Slip; Titanium; Titanium dioxide; Velocity; Couple stress fluid; Numerical simulation; Magnetohydrodynamics; Peristalsis; Electroosmosis; Joule heating
• ISSN: 0973-1458; 0974-9845
• DOI: 10.1007/s12648-020-01906-0

This paper presents a computational modeling approach to analyze the peristaltic pumping of couple stress hybrid nanofluids regulated by the electroosmosis mechanism through a microchannel. The effects of applied magnetic field, Joule heating and buoyancy have also been computed. In this analytical model, water-based titanium dioxide (TiO 2 ) and silver (Ag) hybrid nanofluids have been considered. For more relevant physical problem, the axial velocity slip and thermal slip conditions have also been introduced. The nonlinear differential equations are simplified by considering the Hückel–Debye approximations as well as lubrication theory, and then the equations have been solved numerically by Mathematica 10 software via the NDsolve commands. The pertinent influences of key parameters on the axial velocity, nanoparticle temperature, Nusselt number and streamlines in the microchannel have been visualized graphically. It is observed that an increase in the thermal Grashof number produces a maximum axial velocity, and temperature of nanoparticles for both water–titanium dioxide and water–silver nanofluids. The maximum axial velocity and nanoparticle temperature occur in water–titanium dioxide as compared with water–silver. The outcomes of this model shall be very useful in the designs of smart electro-peristaltic pumps for thermal systems and drug delivery systems.