Surface Structure Enhanced Microchannel Flow Boiling

By Yangying Zhu, D. Antao, K. Chu, Siyu Chen, T. Hendricks, Tiejun Zhang, Evelyn Wang. 2016

163 citations recorded by the source corpus.

We investigated the role of surface microstructures in two-phase microchannels on suppressing flow instabilities and enhancing heat transfer. We designed and fabricated microchannels with well-defined silicon micropillar arrays on the bottom heated microchannel wall to promote capillary flow for thin film evaporation while facilitating nucleation only from the sidewalls. Our experimental results show significantly reduced temperature and pressure drop fluctuation especially at high heat fluxes. A critical heat flux (CHF) of 969 W/cm2 was achieved with a structured surface, a 57% enhancement compared to a smooth surface. We explain the experimental trends for the CHF enhancement with a liquid wicking model. The results suggest that capillary flow can be maximized to enhance heat transfer via optimizing the microstructure geometry for the development of high performance two-phase microchannel heat sinks.

Subfields: Computational Mechanics, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/f31dce3d7a6dc87165e4e74a658374f838995d96

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computational Mechanics

In Mechanical Engineering

Citations in the corpus

Review of channel flow boiling enhancement by surface modification, and instability suppression schemes (2020, methodology): “[153,154] designed and fabricated arrays of 5- to 10-lm diameter and 25-lm high silicon micro-pillars on the bottom wall of a 0.”
A Review On Transient Thermal Management of Electronic Devices (2021, unknown): “[18] Water 969 210,000/__ Remote David et al.”