Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scaling Laws for the Propulsive Performance of Three-Dimensional
  Pitching Propulsors   Scaling laws for the thrust production and energetics of self-propelled or
fixed-velocity three-dimensional rigid propulsors undergoing pitching motions
are presented. The scaling relations extend the two-dimensional scaling laws
presented in Moored & Quinn (2018) by accounting for the added mass of a
finite-span propulsor, the downwash/upwash effects from the trailing vortex
system of a propulsor, and the elliptical topology of shedding trailing-edge
vortices. The novel three-dimensional scaling laws are validated with
self-propelled inviscid simulations and fixed-velocity experiments over a range
of reduced frequencies, Strouhal numbers and aspect ratios relevant to
bio-inspired propulsion. The scaling laws elucidate the dominant flow physics
behind the thrust production and energetics of pitching bio-propulsors, and
they provide guidance for the design of bio-inspired propulsive systems.

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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph