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<p>Inspired by the pitcher plant’s needle-like surface, a novel open microchannel architecture with a positively curved base is proposed, creating a wedge-shaped sidewall-base interface that enhances capillary-driven fluid spreading speed and coverage. The arched substrate amplifies solid-liquid contact area, stabilizes wetting pathways, and intensifies capillary forces, enabling precise fluid transport without external power. Experiments and simulations demonstrate that this layered geometry maximizes aerosol contact area in mist-flow collection, boosting droplet capture efficiency by 30% while maintaining stable channel flow. The curved-bottom microchannel offers a bioinspired fluid control solution for microfluidic systems, particularly valuable for miniaturized devices requiring stable flow and efficient mass transfer in environmental monitoring, medical diagnostics, and bioengineering. Its structural innovation provides theoretical foundations and design paradigms for water-harvesting microfluidics.</p>

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Capillarity-driven liquid transport in bioinspired curved microchannels for enhanced flow efficiency and water harvesting

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Qingquan Li,
  • Yanling Wan,
  • Yinlong Bai,
  • Yonghua Wang

摘要

Inspired by the pitcher plant’s needle-like surface, a novel open microchannel architecture with a positively curved base is proposed, creating a wedge-shaped sidewall-base interface that enhances capillary-driven fluid spreading speed and coverage. The arched substrate amplifies solid-liquid contact area, stabilizes wetting pathways, and intensifies capillary forces, enabling precise fluid transport without external power. Experiments and simulations demonstrate that this layered geometry maximizes aerosol contact area in mist-flow collection, boosting droplet capture efficiency by 30% while maintaining stable channel flow. The curved-bottom microchannel offers a bioinspired fluid control solution for microfluidic systems, particularly valuable for miniaturized devices requiring stable flow and efficient mass transfer in environmental monitoring, medical diagnostics, and bioengineering. Its structural innovation provides theoretical foundations and design paradigms for water-harvesting microfluidics.