Bow Shock Formation in a Complex Plasma

被引：48

作者：

Saitou, Y. ^{[1
]}

Nakamura, Y. ^{[2
]}

Kamimura, T. ^{[3
]}

Ishihara, O. ^{[2
]}

机构：

[1] Utsunomiya Univ, Fac Engn, Utsunomiya, Tochigi 3218585, Japan

[2] Yokohama Natl Univ, Fac Engn, Yokohama, Kanagawa 2408501, Japan

[3] Meijo Univ, Fac Sci & Technol, Nagoya, Aichi 4688502, Japan

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 06期

关键词：

MACH CONES; DUSTY; VOIDS;

D O I：

10.1103/PhysRevLett.108.065004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A bow shock is observed in a two-dimensional supersonic flow of charged microparticles in a complex plasma. A thin conducting needle is used to make a potential barrier as an obstacle for the particle flow in the complex plasma. The flow is generated and the flow velocity is controlled by changing a tilt angle of the device under the gravitational force. A void, microparticle-free region, is formed around the potential barrier surrounding the obstacle. The flow is bent around the leading edge of the void and forms an arcuate structure when the flow is supersonic. The structure is characterized by the bow shock as confirmed by a polytropic hydrodynamic theory as well as numerical simulation.

引用

页数：4

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