Optimal strouhal number for swimming animals

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August undefined, 2024

WebOct 16, 2003 · A dimensionless parameter that describes the tail or wing kinematics of swimming and flying animals is the Strouhal number 1, St = fA / U, which divides stroke frequency ( f) and amplitude ( A) by ... WebJul 7, 2024 · Eloy C. Optimal Strouhal number for swimming animals. Journal of Fluids and Structures, 2012, 30, 205–218. Article Google Scholar Download references Acknowledgment This study was funded by the National Natural Science Foundation of China (No. 51275127). Author information Authors and Affiliations

Optimal Strouhal number for swimming animals - yumpu.com

WebOct 23, 2024 · Of all the behaviors performed by animals in our dataset, transiting is most similar to the steady-state swimming performed by animals in controlled, laboratory and aquarium studies (Bainbridge, 1958; Fish and Rohr, 1999; Fish et al., 2014). This could explain why the Strouhal number for this individual fell so close to the theoretical optimum. WebOct 28, 2024 · Propulsion performance of swimming and flying animals is often evaluated by using dimensionless numbers, such as the Strouhal and Reynolds numbers. They have … rct 抵抗

Flying and swimming animals cruise at a Strouhal number tuned

WebMany swimming and ﬂying animals are observed to cruise in a narrow range of Strouhal numbers, where the Strouhal number St =2fA=U is a dimensionless parameter that relates … WebUsing Lighthill’s elongated-body theory to address undulatory propulsion, it is demonstrated here that the optimal Strouhal number increases from 0.15 to 0.8 for animals spanning … WebSep 30, 2005 · Abstract: To evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal number, St = fA / U , with f the tail-beat frequency, A the peak-to-peak tail amplitude, and U the swimming velocity. Experiments with flapping foils have exhibited maximum propulsive efficiency in the interval 0.25 St 0.35 … rct 文獻評讀

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Optimal Strouhal number for swimming animals - irphe.fr

WebTo evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal number, St = f A / U, with f the tail-beat frequency, A the peak-to-p Webargued that animals likely evolved to swim in the same narrow interval. Using Lighthill’s elongated-body theory to address undulatory propulsion, it is demonstrated here that the … rct 期中分析WebAug 7, 2024 · Abstract. Many swimming and flying animals are observed to cruise in a narrow range of Strouhal numbers, where the Strouhal number [Formula: see text] is a … rct 心理学

"WebTo evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal number, St = fA/U, with f the tail-beat... Skip to main content Due … " - Optimal strouhal number for swimming animals

Optimal strouhal number for swimming animals

Estimate of Strouhal and Reynolds numbers for swimming penguins

WebApr 1, 2012 · Using Lighthill's elongated-body theory to address undulatory propulsion, it is demonstrated here that the optimal Strouhal number increases from 0.15 to 0.8 for … WebApr 12, 2024 · In nature, jellyfish are one of the most energy-efficient underwater animals due to their locomotion modes, i.e., jet-based or paddling-based swimming ().Moreover, how jellyfish swim combines effective fluidic propulsion and object manipulation, which is beneficial for predation (8, 12, 13).Furthermore, their deformable soft body structure …

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Weboptimal Strouhal number increases from 0:15 to 0:8 for animals spanning from the largest cetaceans to the smallest tadpoles. To assess the validity of this model, the swimming kine- WebThe Strouhal number reflects the difficulty for animals to travel efficiently through a fluid with their cyclic propelling motions. The number relates to propulsive efficiency, which …

WebMar 6, 2014 · A simple body–fluid fish model, representing carangiform locomotion, is developed. Steady swimming at various speeds is analysed using optimal gait theory by … WebThe vortex flow pattern and high propulsive efficiency of 89% were associated with Strouhal numbers within the optimal range (0.2–0.4) for rays swimming at routine and high speeds. ... R.L.; Thomas, A.L.R. Flying and swimming animals cruise at a Strouhal number tuned for high power efficiency. Nature 2003, 425, 707–711. [Google Scholar ...

Webthat the Strouhal number for peak efﬁciency is largely determined by ﬂuid drag on the ﬁns and wings. swimming jﬂight jbiolocomotion jdrag S wimming and ﬂying animals across many species and scales cruise in a relatively narrow range of Strouhal numbers 0:2<0:4 (1, 2). The Strouhal number St =2fA=U is a

WebMar 6, 2024 · The Strouhal number reflects the difficulty for animals to travel efficiently through a fluid with their cyclic propelling motions. The number relates to propulsive efficiency, which peaks between 70-80% when within the optimal Strouhal number range of …

WebOptimal Strouhal number for swimming animals. EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa … rct 政策WebApr 15, 2004 · SUMMARY. Swimming efficiencies of fish and cetaceans have been related to a certain synchrony between stroke cycle frequency, peak-to-peak tail/fluke amplitude and mean swimming speed. These kinematic parameters form a non-dimensional wake parameter, referred to as a Strouhal number, which for the range between 0.20 and 0.40 … simulated proxy ue4WebUsing Lighthill's elongated-body theory to address undulatory propulsion, it is demonstrated here that the optimal Strouhal number increases from 0.15 to 0.8 for animals spanning … simulated rock mobile home skirtingWebOptimal Strouhal number for swimming animals. EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk ... rct 特点WebJun 14, 2024 · Animals such as birds , ... Regarding Strouhal number influence, ... Thomas, A.L.R. Flying and Swimming Animals Cruise at a Strouhal Number Tuned for High Power Efficiency. Nature 2003, 425, 707–711. [Google Scholar] Vuruskan, A.; Fenercioglu, I.; Cetiner, O. A study on forces acting on a flapping wing. rct 文献WebWe present an analysis of efficient undulatory propulsion for slender animals swimming at high Reynolds number. Using Lighthill’s large-amplitude elongated-body theory, we show that optimally efficient swimming kinematics can be characterized through a single dimensionless variable 𝜓. simulated reality pty ltd abnWebApr 11, 2024 · Moreover, for a constant swimming speed and flapping frequency, up to certain limit, even with the change in amplitude swimming penguins offer Strouhal number within the recommended range of higher propulsive efficiency i.e., 0.2 < St < 0.4. ... Eloy C (2012) Optimal Strouhal number for swimming animals. J Fluids Struct 30:205–218 rct 意味