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Open AccessArticle

Numerical Investigation of the Hydrodynamics of Changing Fin Positions within a 4-Fin Surfboard Configuration

1
Division of Phoniatrics and Pediatric Audiology at the Department of Otorhinolaryngology, Head & Neck Surgery, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Germany
2
Department of Radiology, Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Germany
3
Daum Tooling Inc., San Clemente, CA 92672, USA
4
Computer Graphics Group, Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(3), 816; https://doi.org/10.3390/app10030816
Received: 14 November 2019 / Revised: 14 January 2020 / Accepted: 20 January 2020 / Published: 23 January 2020
(This article belongs to the Section Mechanical Engineering)
Most sports like surfing are highly developed. It is necessary to tease the last percentages out of the competitors and equipment—in the case of surfing the surfboard-fin-system—to win competitions or championships. In this computational investigation, a parameter study of the positioning of the two rear fins within a 4-fin configuration with fixed front fins on a surfboard is executed to find appropriate fin positions for specific surf situations. Four different inflow velocities are investigated. The RANS and URANS models combined with the SST k ω turbulence model, which is available within the computational fluid dynamics (CFD) package STAR-CCM+, are used to simulate the flow field around the fins for angles of attack (AoA) between 0° and 45°. The simulation results show that shifting the rear fins toward the longitudinal axis of the surfboard lowers the maximum lift. Surfboards with 4-fin configurations are slower in nearly the whole range of AoA due to a higher drag force but produce a higher lift force compared to the 3-fin configuration. The lift and drag forces increase significantly with increasing inflow velocity. This study shows a significant influence of the rear fin positioning and the inflow velocity on lift and drag performance characteristics. View Full-Text
Keywords: computational fluid dynamics (CFD); surfboard; fins; hydrodynamics; Quad; STAR-CCM+® computational fluid dynamics (CFD); surfboard; fins; hydrodynamics; Quad; STAR-CCM+®
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MDPI and ACS Style

Falk, S.; Kniesburges, S.; Janka, R.; O’Keefe, T.; Grosso, R.; Döllinger, M. Numerical Investigation of the Hydrodynamics of Changing Fin Positions within a 4-Fin Surfboard Configuration. Appl. Sci. 2020, 10, 816. https://doi.org/10.3390/app10030816

AMA Style

Falk S, Kniesburges S, Janka R, O’Keefe T, Grosso R, Döllinger M. Numerical Investigation of the Hydrodynamics of Changing Fin Positions within a 4-Fin Surfboard Configuration. Applied Sciences. 2020; 10(3):816. https://doi.org/10.3390/app10030816

Chicago/Turabian Style

Falk, Sebastian; Kniesburges, Stefan; Janka, Rolf; O’Keefe, Tom; Grosso, Roberto; Döllinger, Michael. 2020. "Numerical Investigation of the Hydrodynamics of Changing Fin Positions within a 4-Fin Surfboard Configuration" Appl. Sci. 10, no. 3: 816. https://doi.org/10.3390/app10030816

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