Investigation of entropy generation in the magnetohydrodynamic electroosmotic peristaltic flow of Cu-Al2O3/H2O hybrid nanofluid via a curved channel

This research introduces a model for the electro-osmotically driven peristaltic
transport of (Cu − Al2O3∕H2O) hybrid nanofluid. This novel approach amalgamates
peristaltic motion with electro-kinetic pumping, thereby amplifying the
effectiveness of the micro-pumps in the realms of nanotechnology and medical
applications. In the study, Maxwell’s thermal conductivity model is utilized
alongside the consideration of several physical effects, encompassing Hall current,
Joule heating induced by magnetic and electric forces, and effects of viscous
dissipation. The governing equations for the flow problem are transformed into
a dimensionless form. Subsequently, these equations are subject to reduction
by imposing constraints based on long wavelengths and the regime of creeping
flow. To obtain an analytical solution for the electric potential function, the
Debye–Hückel approximation is elegantly employed in addressing the Poisson–
Boltzmann equation. The subsequent equations are numerically solved, and
the ensuing results are exhaustively examined, via their graphical depiction.
The inquiry reveals that the inverse Debye–Hückel parameter and Joule heating
parameters exert a notable influence on the hybrid nanofluid’s temperature.
Additionally, it is found that the irreversibility rate of the system can be managed
by reducing the Joule heating parameter and by imposing an electric
field-oriented opposite to the fluid motion.