Hydrodynamic Study of Flow-Channel and Wall-Effect Characteristics in an Oscillating Hydrofoil Biomimetic Pumping Device.

Ertian Hua, Yang Lin, Sihan Li, Xiaopeng Wu

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In one paragraph

Article in Biomimetics (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

4 authors.

Ertian HuaCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.

Yang LinCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.

Sihan LiCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.

Xiaopeng WuCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.

Funding

Zhejiang Provincial Key Research and Development Project Grant No. 2021C03019

6 · The paper itself

Abstract

To clarify how flow-channel configuration and wall spacing govern the hydrodynamic performance of an oscillating-hydrofoil biomimetic pumping device, this study conducted a systematic numerical investigation under confined-flow conditions. Using a finite-volume solver with an overset-grid technique, we compared pumping performance across three channel configurations and a range of channel-wall distances. The results showed that bidirectional-channel confinement suppresses wake deflection and irregular vorticity evolution, enabling symmetric and periodic vortex organization and thereby improving pumping efficiency by approximately 33.6% relative to the single-channel case and by 62.7% relative to the no-channel condition. Wall spacing exhibited a distinctly non-monotonic influence on performance, revealing two high-performance regimes: under extreme confinement (gap ratio h/c= 1.4), the device attains peak pumping and thrust efficiencies of 19.9% and 30.7%, respectively, associated with a strongly guided jet-like transport mode; and under moderate spacing (h/c= 2.2-2.6), both efficiencies remain high due to an improved balance between directional momentum transport and reduced vortex-evolution losses. These findings identify key confinement-driven mechanisms and provide practical guidance for optimizing flow-channel design in ultralow-head oscillating-hydrofoil pumping applications.

Indexed as

flow channelgap ratiopumping performance

Identifiers

PMID41589997

DOI10.3390/biomimetics11010080

PMCPMC12839013

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