Significance of variable viscosity for time-dependent flow of hybrid nanofluids due to spinning surface

This study focuses on the physical characteristics of H2O, a homogenous combination of silver oAg thorn and copper oxide oCuO thorn , with Brownian motion and thermophoresis effects on temper-ature distribution. Additionally, volumetric fraction and effects of motile micro-organism density are investigated when colloidal fluid is circulated due to a spinning sphere. The graphical and tab-ular representation of recently created measures of temperature, concentration, and velocity profiles are considered. With the rising values of unsteady parameter A, the velocity along the x-direction, temperature, and concentration goes down while uplifted in the y-direction. The higher inputs of rotational function k having a growing impact on primary and secondary velocities and a decreasing effects on temperature distribution, distribution of Sherwood and Nusselt numbers is enhanced to increase the impression of the unsteady and rotational parameters as witnessed from sketches. A wide range of investigations of elastic and shear-thinning phenomena have been conducted. The range of the parameters is taken where the behavior of the said parameters is prominent like 0.5',A',2.0, 1.0',K',4.0, 1.0',k',4.0, 6.0',Pr',9.0, 0.1 ', Rd ', 0.4,2.0 ', Sc',5.0, 0.01 ', Nt ', 0.2 and 0.1 ',Nb',0.4.(c) 2023 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Automated summary

This study investigates the physical characteristics of H2O, a homogeneous combination of silver and copper oxide, and analyzes the effects of Brownian motion and thermophoresis on temperature distribution. It also explores the volumetric fraction and the impact of motile micro-organisms when colloidal fluid is circulated by a spinning sphere. The study presents graphical and tabular representations of temperature, concentration, and velocity profiles, and discusses the influence of rotational and unsteady parameters on these profiles.