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Biomimetic Micropillar Wick for Enhanced Thin-Film Evaporation by S, Anand; Sharma, Chander Shekhar is a scholarly article available to read on EtoBox.

What is Biomimetic Micropillar Wick for Enhanced Thin-Film Evaporation about?

Sustainable liquid cooling solutions are recognized as the future of thermal management in the chip industry. Among them, the phase change heat transfer devices such as heat pipes and vapour chambers have shown tremendous potential. These devices rely on the physics of capillary-driven thin-film evaporation which is inherently coupled with the design and optimization of the evaporator wicks used in these devices. Here, we introduce a biomimetic evaporator wick design inspired by the peristome of the Nepenthes alata that can achieve significantly enhanced evaporative cooling. It consists of array of micropillars with multiple wedges along the sidewall of each micropillar. The efficacy of the wedged micropillar is evaluated based on a validated numerical model on the metrics of dryout heat flux and effective heat transfer coefficient. The wedge angle is chosen such that wedged micropillars cause liquid filaments to rise along the micropillar vertical walls. This results in a significant increase in thin-film area for evaporation. Additionally, the large mean curvature of the liquid meniscus produces strong capillary pumping pressure and simultaneously, the wedges increase the overall

Author

S, Anand; Sharma, Chander Shekhar

Published

2023

Language

EN