Entropy analysis of an electrically conducting boundary layer of a nanofluid with
microrotation elements over a moving plate is presented in this article by applying the second
law of thermodynamics. Two types of nanoparticles, copper oxide (CuO) and aluminum
oxide (Al2O3), are considered in addition to microstructure elements within a base fluid.
The analysis is based on governing boundary layer equations associated with the linear and
angular momentum as well as the energy transformed by introducing a suitable similarity
transformation into a system of triple nonlinear differential equations that are solved analytically.
On the physical side, this article examines the effect of the nanoparticle type and
its concentration as well as the type of base fluid, whether Newtonian or non-Newtonian,
on the rate of entropy generated and the rate of heat flux from the surface. This simulation
involves the cooling stage of the metals during the heat treatment process, which controls
the final mechanical properties of the plate, so controlling the entropy of the cooling system
plays a great role on the results. The results obtained confirm that the entropy generation
of the non-Newtonian fluids (fluids with microrotation elements) is higher than that of the
Newtonian fluids and that the presence of nanoparticles in the cooling system increases the
rate of entropy by 1–4% according to the type and concentration of the nanoparticles |
