摘要
采用约化摄动法,得到描述无磁场等离子体中离子声波传播的modified Kadomtsev-Petviashvili(mKP)方程,构造有限差分格式对mKP方程的一类特殊孤立波解的稳定性进行数值研究.数值结果表明:在两种特殊情形的初始扰动下,该孤立波均不稳定.
The reductive perturbation method is employed to describe the behaviour of ion-acoustic waves for plasmas in the absence of magnetic field, leading to a type of modified Kadomtsev-Petviashvili equation. The stability of a special type of solitary wave solutions for the modified Kadomtsev-Petviashvili equation is investigated with a finite difference scheme. The numerical results show that this solitary wave is unstable under two particular initial perturbations.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第13期26-30,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:11047010)
教育部科学技术研究重点项目基金(批准号:209128)
西北师范大学自然科学基金(批准号:NWNU-KJCXGC-03-53)资助的课题~~
关键词
离子声孤波
约化摄动法
MKP方程
稳定性
ion-acoustic solitary waves, reductive perturbation method, modified Kadomtsev-Petviashvili equa-tion, stability