Chaotic energy transport and thermo-solutal convection in radiative hybrid nanofluids over a heated vertical surface

Abstract

The chaotic dynamics and thermo-migration of copper and alumina nanoparticles in water over a convectively heated surface are quantitatively analyzed in this work. The study addresses the need for improved heat transfer by examining the combined effects of thermal radiation , activation energy , and chemical reaction on flow behavior, heat and mass transport efficiency. This work provides a more realistic thermal boundary condition by taking into account heat transfer through surface convection, in contrast to studies that assume fixed heat flow conditions. A suitable similarity transformation is used to convert the governing system of coupled partial differential equations into an ordinary differential system to model the intricate interconnections. The Chebyshev-based collocation approach is then used to solve the resulting dimensionless equations numerically, guaranteeing great accuracy and computing efficiency. Effects of key parameters on velocity, temperature, and concentration distributions are graphically depicted, offering insight into the underlying transport mechanisms. According to the findings, the random motion of nanoparticles intensifies, and energy is evenly distributed throughout the fluid, leading to enhanced thermal conductivity and a reduction in local temperature differences at different chaotic movements of alumina/copper nanoparticles . The thermal radiation has contributed to a 91.14 % increase in the heat transfer coefficient while a rise in the chemical reaction parameter influence a reduction of 2.28 % against the shear stress coefficient. By optimizing energy use in heating and cooling applications, these insights aid in the production of more effective thermal management systems.