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Nonlinear Saturation of Rayleigh-taylor Instability and Generation of Shear Flow in Equatorial Spread-f Plasma : Volume 8, Issue 3 (30/11/-0001)

By Chakrabarti, N.

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Book Id: WPLBN0004019975
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Nonlinear Saturation of Rayleigh-taylor Instability and Generation of Shear Flow in Equatorial Spread-f Plasma : Volume 8, Issue 3 (30/11/-0001)  
Author: Chakrabarti, N.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Lakhina, G. S., & Chakrabarti, N. (-0001). Nonlinear Saturation of Rayleigh-taylor Instability and Generation of Shear Flow in Equatorial Spread-f Plasma : Volume 8, Issue 3 (30/11/-0001). Retrieved from http://hawaiilibrary.net/


Description
Description: Indian Institute of Geomagnetism, Dr. Nanabhai Moos marg, Colaba, Mumbai 400 005, India. An analysis of low order mode coupling equations is used to describe the nonlinear behaviour of the Rayleigh-Taylor (RT) instability in the equatorial ionosphere. The nonlinear evolution of RT instability leads to the development of shear flow. It is found that there is an interplay between the nonlinearity and the shear flow which compete with each other and saturate the RT mode, both in the collisionless and collisional regime. However, the nonlinearly saturated state, normally known as vortices or bubbles, may not be stable. Under certain condition these bubbles are shown to be unstable to short scale secondary instabilities that are driven by the large gradients which develop within these structures. Some understanding of the role of collisional nonlinearity in the  shear flow generations is also discussed.

Summary
Nonlinear saturation of Rayleigh-Taylor instability and generation of shear flow in equatorial spread-F plasma

 

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