A First Look at the Performance of Nano-Grooved Heat Pipes

TL;DR

This study uses molecular dynamics simulations to evaluate the performance of nanoscale nano-grooved heat pipes, revealing how parameters like filling ratio, heat load, and geometry influence their efficiency.

Contribution

It introduces a simulation-based approach to analyze nanoscale heat pipes, highlighting the importance of geometric and operational parameters for optimal performance.

Findings

Performance depends on filling ratio and heat load

Size and geometry significantly affect thermal efficiency

Simulation framework enables computational experimentation at nanoscale

Abstract

Passive thermal spreaders utilizing liquid/vapor phase-change mechanism such as heat pipes, have been widely used in the macro-scale thermal management of electronic devices for many years. Micro-fabrication techniques enabled the fabrication micro-scale grooved heat pipes on semiconductors. Recent advances in fabrication techniques, on the other hand, enabled producing nano- and {\AA}ngstr\"om-scale capillaries and cavities, which renders the manufacturing of nanoscale heat pipes possible. In the present study, we have simulated nanoscale heat pipes composed of nano-grooves using molecular dynamics and evaluated their performance based on different operating parameters such as the filling ratio and heat load. Moreover, evaluation of size effect on the thermal performance is made by comparing proportionally scaled heat pipes. Simulation results reveal that efficient operation of nano-grooved heat pipes depend not only on the proper selections of filling ratio and heat load, but also on the geometrical parameters such as cross sectional dimensions and aspect ratio of the groove. The modeling strategy used in this study opens an opportunity for computational experimentation of nanoscale heat pipes.