Optimal strouhal number for swimming animals
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 … WebFeb 26, 2024 · With different amplitude, the Strouhal number varies from 0.11 to 1.1, and the 3D wake structures visualized by the instantaneous isosurfaces of the λ 2 criterion are shown in Figure 9. In Figure 9(a), the Strouhal number is 0.11, but the wake pattern is featured as a double-row wake. At the beginning, the vortex is attached to the fish ...
Optimal strouhal number for swimming animals
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WebOptimal Strouhal number for swimming animals Eloy, Christophe To evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal … WebIn this work, an optimal Strouhal number will be calculated for swimming animals without explicit reference to the stability or the dynamics of their wakes. First, Lighthill’s large …
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 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 ...
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 …
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 been shown to allow a better...
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 … sun staring for healthWebApr 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 … sun starts to setWebargued 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 … sun stashes facewearWebOptimal Strouhal number for swimming animals. EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa … sun starved palm sea of thievesWebApr 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 … sun state cbd hand lotionWebOptimal 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 ... sun staring world recordWebWe 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. sun stash hat