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How Travelling Wavelength Affects Hydrodynamic Performance of Two Linear-Accelerating Mirror-Symmetric Fish-Like Swimmers

Zhonglu Lin^1,2, Dongfang Liang², Yu Zhang^1,*

1 Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
2 Cambridge University Engineering Department, Trumpington St, Cambridge, CB2 1PZ, UK

* Corresponding Author: Yu Zhang. Email:

The International Conference on Computational & Experimental Engineering and Sciences 2023, 27(3), 1-9. https://doi.org/10.32604/icces.2023.010442

Abstract

Fish schools are capable of simultaneous linear acceleration. To reveal the underlying hydrodynamic mechanism, we numerically investigate how Reynolds number Re = 1000−2000, Strouhal number St = 0.2−0.7 and wavelength λ = 0.5−2 affects the mean net thrust of two side-by-side NACA0012 hydrofoils undulating in anti-phase. In total, 550 cases are simulated using immersed boundary method. The thrust is strengthened by wavelength and Strouhal number, yet only slightly by the Reynolds number. We apply the symbolic regression algorithm to formulate this relationship as a high-level summary.

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Keywords

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