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RISS 인기검색어
- 검색키워드
- 저자 : Kai-Biao Zhang (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Nonlinear Dust-acoustic Solitary Waves in a Dust Plasma with Two-temperature Nonthermal Ions
Kai-Biao Zhang,Hong-Yan Wang 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.4
The effect of two-temperature nonthermal ions on small, but flnite, amplitude nonlinear dust- acoustic waves (DAW) is studied in a dusty plasma consisting of a negative dust °fluid, Boltzmann distributed electrons, and two-temperature nonthermally distributed ions. We derive a Korteweg-de Vries (KdV) equation governing the dust-acoustic solitary waves by using the reductive perturbation method. We show that the presence of two-temperature nonthermal ions modi¯es the properties of dust-acoustic solitary structures significantly and may allow rarefactive and compressive solitary waves to coexist. The effect of two-temperature nonthermal ions on small, but flnite, amplitude nonlinear dust- acoustic waves (DAW) is studied in a dusty plasma consisting of a negative dust °fluid, Boltzmann distributed electrons, and two-temperature nonthermally distributed ions. We derive a Korteweg-de Vries (KdV) equation governing the dust-acoustic solitary waves by using the reductive perturbation method. We show that the presence of two-temperature nonthermal ions modi¯es the properties of dust-acoustic solitary structures significantly and may allow rarefactive and compressive solitary waves to coexist.
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Hong-Yan Wang,Kai-Biao Zhang 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.6
A theoretical investigation has been made for the propagation of small, but finite, nonlinear dustacousticwaves (DAW) in a collisionless, unmagnetized dust plasma that contains hot negativelychargeddust particles, cold nonthermal ions, hot nonthermal ions and Maxwellian-distributed electrons. The reductive perturbation method is employed to reduce the basic set of fluid equationsto the modified Korteweg-de Vried (KdV) equation. How the amplitudes and the widths of thedust-acoustic waves vary with the plasma parameters is studied by using numerical simulations. Results show that not only the fast ion but also the number densities and the temperatures of thedust, the cold ions, the hot ions and the electrons all can play significant roles in determining thefeatures of the amplitude and the width.
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Planar Dust-acoustic Waves in Electron-positron-ion-dust Plasmas with Dust Size Distribution
Hong-Yan Wang,Kai-Biao Zhang 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.11
Nonlinear dust-acoustic solitary waves which are described with a Kortweg-de vries (KdV) equationby using the reductive perturbation method, are investigated in a planar unmagnetized dustyplasma consisting of electrons, positrons, ions and negatively-charged dust particles of different sizesand masses. The effects of the power-law distribution of dust and other plasma parameters on thedust-acoustic solitary waves are studied. Numerical results show that the dust size distribution hasa significant influence on the propagation properties of dust-acoustic solitons. The amplitudes ofsolitary waves in the case of a power-law distribution is observed to be smaller, but the solitonvelocity and width are observed to be larger, than those of mono-sized dust grains with an averagedust size. Our results indicate that only compressed solitary waves exist in dusty plasma withdifferent dust species. The relevance of the present investigation to interstellar clouds is discussed.
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