Numerical study of the expansion of metallic vapor plasma by a nanosecond laser pulse

被引：6

作者：

Aggoune, S. ^{[1
]}

Vidal, F. ^{[2
]}

Amara, E. H. ^{[1
]}

机构：

[1] Ctr Dev Technol Avancees, Laser Mat Proc Team, Algiers 16303, Algeria

[2] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 101卷 / 01期

关键词：

GAS-DYNAMICS; ALUMINUM PLASMA; ABLATION PLUME; AMBIENT GAS; PROPAGATION; IRRADIATION; DEPOSITION;

D O I：

10.1007/s00339-010-5783-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The interaction between a laser-produced aluminum plasma and the ambient air, at a pressure of 173.3 Pa, is studied at the plasma thermalization stage. A two-dimensional approach is developed to solve the Navier-Stokes equations, where a finite volume discretization allows for obtaining a numerical solution. The simulation runs over a time representing 10 mu s of plasma expansion. It is shown that the shock and drag models are good approximations for the two successive regimes after the initial strong expansion stage, and the calculation makes evident the plume sharpening on the axial direction before its confinement by the ambient gas, which is in good agreement with the experimental observation.

引用

页码：167 / 171

页数：5