Instruct: Identify the main category of Biorxiv papers based on the titles and abstracts
Query: Fin sweep angle does not determine flapping propulsive performance The importance of the leading-edge sweep angle of propulsive surfaces used by unsteady swimming and flying animals has been an issue of debate for many years, spurring studies in biology, engineering, and robotics with mixed conclusions. In this work, we provide results from three-dimensional simulations of finite foils undergoing tail-like (pitch-heave) and flipper-like (twist-roll) kinematics for a range of sweep angles based on a large range of animal data while carefully controlling all other parameters. Our primary finding is the negligible 0.043 maximum correlation between the sweep angle and the propulsive force and power for both tail-like and flipper-like motions. This indicates that fish tails and mammal flukes with similar range and size can have a large range of potential sweep angles without significant negative propulsive impact. Although there is a slight benefit to avoiding large sweep angles, this is easily compensated by adjusting the fins motion parameters such as flapping frequency, amplitude and maximum angle of attack to gain higher thrust and efficiency.
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The categories of this paper are: plant
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The categories of this paper are: immunology
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The categories of this paper are: synthetic
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The categories of this paper are: scientific
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The categories of this paper are: zoology
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The categories of this paper are: biochemistry
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The categories of this paper are: genomics
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The categories of this paper are: paleontology
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The categories of this paper are: pharmacology
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The categories of this paper are: cancer
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The categories of this paper are: ecology
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The categories of this paper are: molecular
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The categories of this paper are: toxicology
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The categories of this paper are: communication
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The categories of this paper are: microbiology
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The categories of this paper are: cell