Rapid self-propelled directional droplet transport on microchannel-embedded wettability-patterned surfaces for enhanced heat transfer

2026-08-10

PRE

Dongdong Xie

Guilian Wang

Xinmeng Zhai

Yongjin Wu

Han Cai

Yuan Zhu

Yunna Sun *

Zhuoqing Yang

Yan Wang

Faheng Zang

Guifu Ding *

DOI：10.1016/j.applthermaleng.2026.132707

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Abstract

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• Embedded microchannels compensate for the decay of the unbalanced Young's force. • Stage-coupled driving sustains rapid long-range directional droplet transport. • A 5 μL droplet on MEWS reaches 56.2 mm/s over 35 mm. • Liquid-delivery capability of MEWS is 3.1 times that of the patterned control. • Modeling predicts a ∼ 111% higher heat transfer limit for the vapor chamber.

Keywords:

Directional fluid transport

Wettability

Capillary wicking

Heat transfer

Rapid self-propelled directional droplet transport on microchannel-embedded wettability-patterned surfaces for enhanced heat transfer

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