This study aims to explore the thermal convection characteristics of nano-encapsulated phase change materials (NEPCMs) suspended in non-Newtonian nanofluids within a rotating enclosure, addressing a critical gap in the understanding of heat transfer and flow behavior in such complex systems.
The finite element method is used to solve the dimensionless governing equations for continuity, momentum and energy, providing insights into the effects of power-law indices, nanoparticle concentrations and rotational speeds on flow dynamics, thermal transport and phase change processes.
The findings highlight that the interplay between non-Newtonian rheology and NEPCM concentration significantly influences natural convection, particularly near the cold wall. Pseudoplastic nanofluids exhibit greater sensitivity to rotational forces than dilatant fluids, where shear-thinning behavior enhances circulation and heat dissipation. Among the examined fluid types, Newtonian nanofluids demonstrate the highest heat transfer efficiency, achieving a 42% enhancement as nanoparticle concentration increases from 0.01 to 0.04.
This study uniquely investigates NEPCM nanofluids suspended in non-Newtonian fluids within a rotating enclosure, a combination not previously explored in detail. By analyzing the coupled effects of power-law rheology, rotation and phase change, the work provides new insights into thermal transport mechanisms relevant to advanced energy storage and cooling systems.
