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Damping and Trapping in 2D Inviscid Fluids

Pillai, N. Sateesh and Gould, Roy W. (1994) Damping and Trapping in 2D Inviscid Fluids. Physical Review Letters, 73 (21). pp. 2849-2853. ISSN 0031-9007.

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We demonstrate collisionless decay due to phase mixing of a disturbance in an inviscid 2D fluid with sheared flow. Experiments performed on a cylindrical pure electron plasma, which behaves as a 2D inviscid fluid, show that a small amplitude quadrupole excitation (m=2, k=0 mode) decays exponentially. At larger amplitudes, the exponential decay is modulated by bounce motion of fluid elements trapped in the azimuthally traveling wave field, with the bounce frequency proportional to the square root of the excitation amplitude. We also show that the linear decay rate is decreased by the addition of external dissipation. We describe a calculation of the linearized response function.

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Additional Information:©1994 The American Physical Society Received 6 July 1993; revised 11 August 1994 This work was supported by ONR Grant No. N00014-89-J-1264.
Issue or Number:21
Record Number:CaltechAUTHORS:PILprl94
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1811
Deposited By: Archive Administrator
Deposited On:19 Feb 2006
Last Modified:02 Oct 2019 22:47

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