Significance of unsteady rotating flow of nanofluid with nanoparticles aggregation and impacts of slip conditions and variable viscosity

Abstract

The unsteady nanofluid flow that rotates in both directions over a stretched surface could assist many technological and industrial processes. When the effects of slip conditions, aggregation, and changing viscosity are considered, the flow of nanofluid over a stretched surface can be used in surface coatings and deposition, energy harvesting devices, drug delivery systems, and cooling systems with better heat transfer. The major purpose of this study is to evaluate the influence that variable viscosity, slip conditions, and aggregation have on the flow behavior of nanofluids in three dimensions. This research looks specifically at non-axisymmetric stagnation point flows on stretched sheet. The governing equations are going to be modeled based on the assumptions that have been stated. Through a technique known as a similarity transformation, a complex system of nonlinear partial differential equations can be reduced to ordinary differential equations. This makes the system significantly easier to work with. The algorithm will be employed afterward to numerically solve the simplified set of equations. The results are obtained using the Runge–Kutta (RK-IV) and the shooting method. Graphical displays provide an easy way to examine how different parameters interact with one another and their impacts. With an increase in nanoparticle concentration, heat transfer rate shows an increasing trend. Due to the decrease in the instability parameter, rate of heat transfer decreases. Velocity profiles increases in both directions with increasing strain rate. A comparison of influences of nanoparticle aggregation with and without radiation is shown in the tables, highlighting the differences in Nusselt numbers. The results of the present study closely correspond to those reported in a prior publication for the same scenario, offering robust additional support for the findings.