Enhanced thermal conductivity of spherical graphenebased nanofluid flow near a stagnation point in a microgravity environment

This study presents a theoretical investigation of three-dimensional unsteady nanofluid flow with enhanced thermal conductivity using spherical graphene nanoparticles near a stagnation point under microgravity environment. A mathematical model is formulated to describe the conservation of mass, momentum, and energy, resulting in a coupled system of nonlinear partial differential equations. The governing equations are transformed using appropriate semi-similar variables and solved using the Keller box method, a robust finite difference-based numerical technique well-suited for boundary layer problems. Analysis is conducted to examine the influence of nanoparticle volume fraction, curvature ratio and g-jitter effect on flow behaviors and thermal characteristic of the fluid system. The results reveal that the inclusion of spherical graphene nanoparticles significantly enhances the effective thermal conductivity, leading to improved heat transfer rates. The findings provide valuable insight for the optimization of thermal management systems in microgravity applications such as spacecraft and other microgravity environment condition.