Thermal Analysis on MHD Flow of Ethylene Glycol-based BNNTs Nanofluids via Peristaltically Induced Electroosmotic Pumping in a Curved Microchannel.

This investigation aims to analyze the effect of boron nitride nanotubes (BNNTs) suspension on the heat transfer performance of ethylene glycol (EG) based nanofluids flow curved microchannel driven by two pumping mechanisms i.e., peristaltic pumping and electroosmotic pumping. The shear-thinning aspect of BNNTs-EG nanofluid is characterized by employing the Carreau fluid model. A uniform magnetic field is also imposed along the curved conduit, and the effect of Hall currents and ion slip generated by this magnetic field is also considered. The analysis has been performed in the presence of the Joule heating phenomenon. The no-slip conditions for velocity and convective boundary conditions for heat and mass transfer are enforced along channel walls. The Poisson-Boltzmann equation in curvilinear coordinates is employed to find the electric potential distribution in the fluid medium subject to the approximation of lower zeta potential. Further, the system of equations is executed numerically by Maple 17 subject to the lubrication linearization principle. The impression of important physical parameters on the flow characteristics is displayed graphically. It is found that more cooling effect is generated by considering a channel with relatively less curvature and fluid momentum is assisted by the larger curvature parameter i.e., in a straighter channel. It is further revealed that the increasing volume fraction of BN nanotubes reduces the shear-thinning characteristics of BNNTs-EG nanofluid, however, it enhances the thermal conductivity of the nanofluid and removes the heat from the system more efficiently. [ABSTRACT FROM AUTHOR]