Curvature dependence of heat transfer at a fluid-solid interface

Abstract

This study reports an opposing effect of curvature on the interfacial heat transfer, which implies a monotonic increase in the temperature jump over a convex surface and, conversely, a monotonic decrease in the temperature jump over a concave surface, as the curvature of the surface increases. The study shows that this effect is present at both gas-solid and liquid-solid interfaces. The curvature dependence of the interfacial thermal conductance is also investigated and the opposing effect is elucidated by the change in the thermal conductivity of the fluid-solid interface.

Thermal Resistance Of A Liquid-Solid Interface on Curved Smooth and Rough Walls

“…The present study runs non-equilibrium molecular dynamics (NEMD) simulations and considers a thin heated cylindrical shell, which is located in the middle of the gap between two coaxial stationary cylinders, in order to investigate the thermal boundary resistance. In contrast to previous molecular dynamics simulations [3][4], realistic walls are created to examine the interfacial heat transfer related to the surface curvature over rough and smooth surfaces.…”