Time-Fractional KdV Equation Describing the Propagation of Electron-Acoustic Waves in plasma

Details Time-Fractional KdV Equation Describing the Propagation of Electron-Acoustic Waves in plasma Time-Fractional KdV Equation Describing the Propagation of Electron-Acoustic Waves in plasma

2010-04-12

arxiv.org/abs/1004.2078v1

Physics

Plasma Physics

about 17 pages + 6 figures

Scientific paper

The reductive perturbation method has been employed to derive the Korteweg-de Vries (KdV) equation for small but finite amplitude electron-acoustic waves. The Lagrangian of the time fractional KdV equation is used in similar form to the Lagrangian of the regular KdV equation. The variation of the functional of this Lagrangian leads to the Euler-Lagrange equation that leads to the time fractional KdV equation. The Riemann-Liouvulle definition of the fractional derivative is used to describe the time fractional operator in the fractional KdV equation. The variational-iteration method given by He is used to solve the derived time fractional KdV equation. The calculations of the solution with initial condition A0*sech(cx)^2 are carried out. The result of the present investigation may be applicable to some plasma environments, such as the Earth's magnetotail region.

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