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Wakes behind towed and self-propelled bodies: Asymptotic theory Y. D. Afanasyeva)
 

Summary: Wakes behind towed and self-propelled bodies: Asymptotic theory
Y. D. Afanasyeva)
Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John's,
Newfoundland A1B 3X7, Canada
Received 6 February 2004; accepted 4 May 2004; published online 7 July 2004
Solutions for the steady or unsteady wake flows induced by a localized single force or a force
doublet in a uniform stream are obtained in Oseen approximation for two-dimensional planar as
well as for three-dimensional axisymmetric flows. These solutions are compared with the steady
solutions obtained previously by other authors in boundary layer approximation. The
straightforward approach to the general problem of the flow induced by any distribution of localized
forces which was developed here, can be used to obtain the vorticity and stream function
distributions for the flows generated by forcing of more complicated spatial symmetry in both two
and three dimensions. 2004 American Institute of Physics. DOI: 10.1063/1.1768071
The problem of quantitative description of characteris-
tics of vortical wakes arises in a large number of applica-
tions. Examples include wakes behind swimming micro-
organisms or flows of larger scale generated by towed or
self-propelled bodies. The general feature of these flows is
that different moving objects can be effectively reduced to a
combination of spatially localized forces acting on the fluid

  

Source: Afanassiev, Iakov - Department of Physics and Physical Oceanography, Memorial University of Newfoundland

 

Collections: Geosciences