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Bionic research on Paramisgurnus dabryanus scales for drag reduction
Liyan Wu1, Guihang Luo1, Feifan He1
1College of Engineering, Shenyang Agricultural University Shenyang 110866 China xiaoguangfan1982@syau.edu.cn.
RSC Advances
|September 12, 2022
Summary
Researchers developed a bionic loach scale surface that significantly reduces drag on marine vehicles. This innovative biomimetic approach achieved drag reduction rates between 9.42% and 17.25% in water tunnel experiments.
Area of Science:
- Fluid Dynamics
- Biomimetics
- Marine Engineering
Background:
- Drag reduction is critical for marine vehicles and fluid transport efficiency.
- Investigating novel strategies for flow resistance reduction is essential.
- Bionic approaches offer promising avenues for drag reduction.
Purpose of the Study:
- To investigate the drag reduction characteristics of the *Paramisgurnus dabryanus* (loach) surface microstructure.
- To explore a bionic approach for reducing flow resistance using loach scales.
- To prepare a large-area flexible bionic loach scale surface.
Main Methods:
- Preparation of a large-area flexible bionic loach scale surface using a template method.
- Water tunnel experiments to measure drag reduction rates.
- Numerical simulations to analyze the flow field and understand drag reduction mechanisms.
Main Results:
- Bionic loach scale surfaces demonstrated drag reduction rates ranging from 9.42% to 17.25% compared to smooth surfaces.
- Numerical simulations revealed that bionic scales create favorable pressure gradients and low-speed vortices.
- Both experimental and simulation results confirmed the drag reduction effectiveness of the bionic loach scales.
Conclusions:
- The bionic scales of *Paramisgurnus dabryanus* effectively achieve underwater drag reduction.
- This biomimetic strategy provides a valuable reference for drag reduction in marine industries.
- The findings support the application of bionic surfaces in fluid delivery systems.
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