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Physics of Fluids : Chaotic scattering of two identical point vortex pairs revisited

By Laust Tophøj and Hassan Aref

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Book Id: WPLBN0002169599
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 11 September 2008

Title: Physics of Fluids : Chaotic scattering of two identical point vortex pairs revisited  
Author: Laust Tophøj and Hassan Aref
Volume: Issue : September 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Fluids Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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And Hassan Aref, L. T. (n.d.). Physics of Fluids : Chaotic scattering of two identical point vortex pairs revisited. Retrieved from http://community.worldlibrary.net/


Description
Description: A new numerical exploration suggests that the motion of two vortex pairs, with constituent vortices all of the same absolute circulation, displays chaotic scattering regimes. The mechanisms leading to chaotic scattering are different from the “slingshot effect” identified by Price [Phys. Fluids A 5, 2479 (1993) ] and occur in a different region of the four-vortex phase space. They may, in many cases, be understood by appealing to the solutions of the three-vortex problem obtained by merging two like-signed vortices into one of twice the strength and by assuming that the four-vortex problem has unstable periodic solutions similar to those seen in the thereby associated three-vortex problems. The integrals of motion, linear impulse and Hamiltonian are recast in a form appropriate for vortex pair scattering interactions that provides constraints on the parameters characterizing the outgoing vortex pairs in terms of the initial conditions.

 

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