Gravitational Instability and Condensation Effect of Dust Plasma
Du Jiulin，Ge Debiao
(School of Sciences, Xidian University, Xi'an 710071，China)

Abstract: On the basis of fundamental equations of dust plasma, the influence of selfgravitation or gravity of the dust particles on the macroscopic dynamics of dust plasma is investigated by using the noneq uilibrium dynamical method. It is shown that there is a condensation effect in dust plasma that caused by the gravitational instability, so that the density increases locally. This condensation effect may be related to the forma tion of the molecular clouds in interstellar media and proto-stars, as well as may influence the plasma processing in the laboratory. The conditions for producing the condensation effect and its characteristics are analysed in detail.
Keywords: dust plasma;condensationeffect;gravitational instability