Nonlinear Waves in Nonuniform Complex Astrocloud

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• 作者：A. Haloi and P. K. Karmakar
• 刊名：Contributions to Plasma Physics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：57
• 期：1
• 页码：5-19
• 全文大小：1553K
• ISSN：1521-3986

文摘

The global nonlinear gravito-electrostatic eigen-fluctuation behaviors in large-scale non-uniform complex astroclouds in quasi-neutral hydrodynamic equilibrium are methodologically analyzed. Its composition includes warm lighter electrons, ions; and massive bi-polar multi-dust grains (inertial) with partial ionization sourced, via plasma-contact electrification, in the cloud plasma background. The multi-fluidic viscous drag effects are conjointly encompassed. The naturalistic equilibrium inhomogeneities, gradient forces and nonlinear convective dynamics are considered without any recourse to the Jeans swindle against the traditional perspective. An inho-mogeneous multiscale analytical method is meticulously applied to derive a new conjugated non-integrable coupled (via zeroth-order factors) pair of variable-coefficient inhomogeneous Korteweg de-Vries Burger (i -KdVB) equations containing unique form of non-uniform linear self-consistent gradient-driven sinks. A numerical illustrative scheme is procedurally constructed to examine the canonical fluctuations. It is seen that the eigenspectrum coevolves as electrostatic rarefactive damped oscillatory shock-like structures and self-gravitational compressive damped oscillatory shock-like patterns. The irregular damping nature is attributable to the i -KdVB sinks. The aperiodicity in the hybrid rapid small downstream wavetrains is speculated to be deep-rooted in the quasi-linear gravito-electrostatic interplay. The phase-evolutionary dynamics grow as atypical non-chaotic fixed-point attractors. We, finally, indicate tentative astronomical applications relevant in large-scale cosmic structure formation aboard facts and faults. (