摘要
通过自相似变换,将描述非磁化无碰撞尘埃等离子体集体运动的非线性偏微分方程组化成常微分方程组,在准中性条件下分别得到了绝热和等温过程的解析解。在中性的初始条件下,用自然界2种实际的尘埃等离子体参数,讨论了绝热过程中尘埃颗粒的分布情况和尘埃温度、尘埃带电荷数以及尘埃相对于离子数密度的比率等因素对尘埃颗粒分布的影响,结果显示:尘埃颗粒多分布在时空边缘,时空中心区域稀疏甚至没有尘埃颗粒,且高温、高带电量以及相对于离子数密度比率高的尘埃等离子体中的尘埃颗粒的分布更趋于时空边缘。
Using a set of similarity transformation, the equations governing umnagnetic collisionless warm dusty plasma are reduced to an ordinary differential equation and the analytical solutions am obtained under quasi-neutrality condition for the adiabatic and isotherm cases, respectively. Furthermore, the effects on the distribution of dust grains from the factors, such as the dust temperature, the charge number and the thickness of dust grain, are investigated with the data presented by reference[ 13] in the adiabatic case.The results show that large number of dust grains are distributed on the edge of the space time and there is a little even none in the center of the space time, fmlhermore, the dust grains with higher temperature, more charge number and the higher rate of dust number density to ion number density are apt to distribute on the edge of the space time.
出处
《石河子大学学报（自然科学版）》
CAS
2008年第4期515-518,共4页
Journal of Shihezi University(Natural Science)
关键词
自相似变换
尘埃等离子体
绝热过程
等温过程
Similarity transformation
Warm dusty plasma
Adiabatic process
Isothermal process
