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Renormalization Group Method for Farley-buneman Fluctuations: Basic Results : Volume 3, Issue 1 (30/11/-0001)

By Hamza, A. M.

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Book Id: WPLBN0004019874
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Renormalization Group Method for Farley-buneman Fluctuations: Basic Results : Volume 3, Issue 1 (30/11/-0001)  
Author: Hamza, A. M.
Volume: Vol. 3, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Hamza, A. M. (-0001). Renormalization Group Method for Farley-buneman Fluctuations: Basic Results : Volume 3, Issue 1 (30/11/-0001). Retrieved from http://hawaiilibrary.net/


Description
Description: Physics Department, Center for Space Research, University of New Brunswick, Fredericton, NB E3B 5A3, Canada. Sudan and Keskinen in [1979] derived a set of equations governing the nonlinear evolution of density fluctuations in a low-pressure weakly ionized plasma driven unstable by the E x B or gradient-drift instability. This problem is of fundamental importance in ionospheric physics. The nonlinear nature of the equations makes it very hard to write a closed form solution. In this paper we propose to use Dynamical Renormalization Group methods to study the long-- wavelength, long-time behaviour of density correlations generated in this ionospheric plasma stirred by a Gaussian random force characterized by a correlation function (fk fk) k. The effect of the small scales on the large scale dynamics in the limit k -> 0 and infinite Reynolds number, can be expressed in the form of renormalized coefficients; in our case renormalized diffusion. If one assumes the power spectra to be given by the kolmogorov argument of cascading of energy, then one can not only derive a subgrid model based on the results of RNG, and this has been done by Hamza and Sudan [1995], but one can also extract the skewness of the spectra as we do in this paper.

Summary
Renormalization group method for Farley-Buneman fluctuations: basic results

 

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