Thumbnail
Access Restriction
Open

Author Gruzinov, A. V. ♦ Kukharkin, N. ♦ Sudan, R. N.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ VISCOUS FLOW ♦ CONVECTION ♦ ELECTRON DENSITY ♦ TURBULENCE ♦ TWO-DIMENSIONAL CALCULATIONS ♦ FRICTION ♦ NAVIER-STOKES EQUATIONS ♦ ANISOTROPY ♦ ENERGY SPECTRA ♦ CHAPMAN-KOLMOGOROV EQUATION
Abstract We show that 2D {bold E{times}B} ionospheric turbulence of the electron density in the equatorial electrojet is isomorphic to the viscous convection of an ordinary fluid in a porous medium due to temperature gradients. Numerical simulations reveal the strong anisotropy in the turbulence, which consists of rising hot bubbles and falling cool bubbles. These bubbles break up into fingers leading to the formation of stable shear flows. After reaching a quasisteady state, the omnidirectional energy spectrum approaches a {ital k}{sup {minus}2} behavior, rather than {ital k}{sup {minus}5/3} as expected from isotropic turbulence. Physical mechanisms that lead to anisotropy are analyzed. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-02-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 76
Issue Number 8


Open content in new tab

   Open content in new tab