Wake Potential for Dust Grains in a Flowing Plasma

Abstract:

The wake effect among dust grains in a flowing plasma is studied by the linear-response dielectric theory within the linear hydrodynamics model. The expression of potential is derived, and it can be divided into two parts: one is the screened Coulomb short-ranged repulsive potential, and the other is the long-ranged oscillatory wake potential. The numerical results show that both the amplitude and wavelength of the wake potential depend on the Mach number, in such a manner that the wavelength of the oscillating potential increases, while its amplitude decreases, with increasing Mach number.

• Periodical: Applied Mechanics and Materials (Volumes 488-489)
• Pages: 26-29
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.488-489.26
• Online since: January 2014
• Authors: Gui Qiu Wang*, Lian Zhi Shan
• Keywords: Dust Grains, Hydrodynamic, Plasma, Wake Effects

References

[1] Edward Thomas and Michael Watson. Charging of silica particles in an argon dusty plasma. [J]. Phys. Plasmas, 2000 (7) 3194-3198.

DOI: 10.1063/1.874184

[2] Giovanni Lapenta. Dipole Moments on dust particles immersed in anisotropic plasmas. [J]. Phys. Rev. Lett., 1995 (75) 4409.

DOI: 10.1103/physrevlett.75.4409

[3] Hubertus M. Thomas and Gregor E. Morfill. Melting dynamics of a plasma crystal [J]. Nature (London), 1996 (379) 806-809.

DOI: 10.1038/379806a0

[4] J. H. Chu and Lin I. Direct observation of coulomb crystals and liquids in strongly coupled rf dusty plasmas. [J] Phys. Rev. Lett. A, 1994 (72) 4009-4012.

DOI: 10.1103/physrevlett.72.4009

[5] R. Singh and M. P. Bora. Electron-drift ion-acoustic mode in a dusty plasma with collisional effects. [J] Phys. Plasmas, 1999 (7) 2335-2310.

DOI: 10.1063/1.874069

[6] Xue Yang, Cong Bo Liu, Yang Yang et al. Existence and damping of dust acoustic solitary waves in a bounded geometry. [J]. Phys. Rev. E, 2013 (87) 063101.

DOI: 10.1103/physreve.91.069903

[7] V. A. Schweigert, I. V. Schweigert, A. Melzer et al. Plasma crystal melting: a nonequilibrium phase transition [J] Phys. Rev. Lett., 1998 (80) 5345-5348.

DOI: 10.1103/physrevlett.80.5345

[8] Osamu Ishihara and Sergey V. Vladimirov. Wake potential of a dust grain in a plasma with ion flow [J] Phys. Plasmas, 1997 (4) 69.

DOI: 10.1063/1.872112

[9] S. V. Vladimirov and M. Nambu. Attraction of charged particulates in plasmas with finite flows. [J]. Phys. Rev. E, 1995 (52) R2172-R2174.

DOI: 10.1103/physreve.52.r2172

[10] Giovanni Lapenta. Linear theory of plasma wakes [J]. Phys. Rev. E, 2000 (62) 1175-1181.

DOI: 10.1103/physreve.62.1175

[11] Lu-Jing Hou, You-Nian Wang and Z. L. Miskovic. Interaction potential among dust grains in a plasma with ion flow [J] Phys. Rev. E, 2001 (64) 046406.