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Capillarity in Fluid01:19

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Related Experiment Video

Updated: Jul 16, 2025

Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
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Low-grade wind-driven directional flow in anchored droplets.

Shan Peng1, Binglin Xie2, Yanlei Wang3

  • 1Department of Inorganic Chemistry, College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, Hebei 071002, China.

Proceedings of the National Academy of Sciences of the United States of America
|September 11, 2023
PubMed
Summary
This summary is machine-generated.

This study presents a novel method to generate electricity from low-speed wind using ionic liquid drops. This technology enables the harvesting of abundant, low-grade wind energy, previously inaccessible to turbines.

Keywords:
contact anglewettabilitywind energy

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Area of Science:

  • Energy Harvesting
  • Materials Science
  • Fluid Dynamics

Background:

  • Low-grade wind (airspeed < 5 m/s) is abundant but difficult to harness with current turbine technology.
  • Existing methods require specific geography and higher wind speeds ( > 5 m/s).

Purpose of the Study:

  • To investigate the potential of using ionic liquid drops to generate energy from low-speed airflow.
  • To develop a novel energy harvesting technology for low-grade wind resources.

Main Methods:

  • Utilizing nanowire-anchored ionic liquid drops to enable directional flow from low-speed airflow.
  • Observing wind-induced stratified circulating flow within the drops using microscopy.
  • Scaling up voltage output using an array of ionic liquid drops ('wind farms').

Main Results:

  • Low-speed airflow induced sensitive directional flow within ionic liquid drops.
  • Stratified circulating flow generated voltage output up to ~0.84 V per drop.
  • A 'wind farm' of drops achieved a scaled-up voltage of ~60 V.

Conclusions:

  • Demonstrated a new method to extract energy from low-grade wind using ionic liquid drops.
  • This technology offers a viable solution for tapping into widespread, low-speed wind energy resources.