Heat transfer characteristics of radiative sodium alginate–MoS2 Burgers nanofluid over a stretching surface with convective heating

Abstract

The growing demand for energy-efficient thermal management solutions has resulted in increased attention towards enhanced heat transfer non-Newtonian nanofluids. To meet this need, the present study investigates the radiative heat transfer characteristics of a sodium alginate-MoS₂ Burgers nanofluid through a stretching surface with convective heating in a Darcy-Forchheimer porous medium. Additionally, the model takes into consideration the combined effects of thermal radiation, convective heating conditions, and non-Darcy porous resistance by combining Burgers viscoelastic rheological behavior with nanoparticle-enhanced thermal transfer. An extensive analysis of the interconnected momentum and heat transfer properties is made possible by such configuration. The resulting system is solved using the MATLAB bvp4c boundary value solver. Systematic studies are carried out on the skin friction coefficient, local Nusselt number, velocity, thermal distribution, and effects of the governing parameters. The findings indicate that elevated Darcy–Forchheimer number hinders fluid movement, while thermal radiation and thermal Biot number notably enhance thermal transport. Quantitatively, raising the Darcy number from 0.1 to 0.6 caused the skin-friction coefficient to rise by 36.7%, while elevating the radiation parameter from 0.6 to 2.0 led to a decrease in the local Nusselt number by 19.4%. In addition, blade-shaped MoS2 particles improved the temperature by 12.7% in comparison to platelet-shaped nanoparticles. The suggested model could assist engineers and industry professionals in enhancing the design and thermal efficiency of polymer processing systems, cooling devices for electronics and batteries.