中国物理B ›› 2020, Vol. 29 ›› Issue (6): 65202-065202.doi: 10.1088/1674-1056/ab829b

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Oblique collisional effects of dust acoustic waves in unmagnetized dusty plasma

M S Alam, M R Talukder   

  1. 1 Department of Mathematics, Chittagong University of Engineering and Technology, Chittagong-4349, Bangladesh;
    2 Plasma Science and Technology Laboratory, Department of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh
  • 收稿日期:2019-09-07 修回日期:2019-12-09 出版日期:2020-06-05 发布日期:2020-06-05
  • 通讯作者: M S Alam E-mail:alam21nov_2016@yahoo.com

Oblique collisional effects of dust acoustic waves in unmagnetized dusty plasma

M S Alam1, M R Talukder2   

  1. 1 Department of Mathematics, Chittagong University of Engineering and Technology, Chittagong-4349, Bangladesh;
    2 Plasma Science and Technology Laboratory, Department of Electrical and Electronic Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh
  • Received:2019-09-07 Revised:2019-12-09 Online:2020-06-05 Published:2020-06-05
  • Contact: M S Alam E-mail:alam21nov_2016@yahoo.com

摘要: Effects of oblique collisions of the dust acoustic (DA) waves in dusty plasma are studied by considering unmagnetized fully ionized plasma. The plasma consists of inertial warm negatively charged massive dusts, positively charged dusts, superthermal kappa distributed electrons, and isothermal ions. The extended Poincaré-Lighthill-Kuo (ePLK) method is employed for the drivation of two-sided Korteweg-de Vries (KdV) equations (KdVEs). The KdV soliton solutions are derived by using the hyperbolic secant method. The effects of superthermality index of electrons, temperature ratio of isothermal ion to electron, and the density ratio of isothermal ions to negatively charged massive dusts on nonlinear coefficients are investigated. The effects of oblique collision on amplitude, phase shift, and potential profile of right traveling solitons of DA waves are also studied. The study reveals that the new nonlinear wave structures are produced in the colliding region due to head-on collision of the two counter propagating DA waves. The nonlinearity is found to decrease with the increasing density ratio of ion to negative dust in the critical region. The phase shifts decrease (increase) with increasing the temperature ratio of ion to electron (κe). The hump (compressive, κe < κec) and dipshaped (rarefactive, κe > κec) solitons are produced depending on the angle (θ) of oblique collision between the two waves.

关键词: ion acoustic wave, dusty plasma, kappa distribution, ePLK method, hyperbolic secant method

Abstract: Effects of oblique collisions of the dust acoustic (DA) waves in dusty plasma are studied by considering unmagnetized fully ionized plasma. The plasma consists of inertial warm negatively charged massive dusts, positively charged dusts, superthermal kappa distributed electrons, and isothermal ions. The extended Poincaré-Lighthill-Kuo (ePLK) method is employed for the drivation of two-sided Korteweg-de Vries (KdV) equations (KdVEs). The KdV soliton solutions are derived by using the hyperbolic secant method. The effects of superthermality index of electrons, temperature ratio of isothermal ion to electron, and the density ratio of isothermal ions to negatively charged massive dusts on nonlinear coefficients are investigated. The effects of oblique collision on amplitude, phase shift, and potential profile of right traveling solitons of DA waves are also studied. The study reveals that the new nonlinear wave structures are produced in the colliding region due to head-on collision of the two counter propagating DA waves. The nonlinearity is found to decrease with the increasing density ratio of ion to negative dust in the critical region. The phase shifts decrease (increase) with increasing the temperature ratio of ion to electron (κe). The hump (compressive, κe < κec) and dipshaped (rarefactive, κe > κec) solitons are produced depending on the angle (θ) of oblique collision between the two waves.

Key words: ion acoustic wave, dusty plasma, kappa distribution, ePLK method, hyperbolic secant method

中图分类号:  (Relativistic plasmas)

  • 52.27.Ny
52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves)) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 52.30.Cv (Magnetohydrodynamics (including electron magnetohydrodynamics))