Hydrodynamical instability of melt flow in laser cutting
- 14 January 1987
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 20 (1) , 140-145
- https://doi.org/10.1088/0022-3727/20/1/021
Abstract
A dynamic model of melt ejection by a gas jet in laser cutting is presented. The molten material is removed due to friction forces and the pressure gradient of the gas flow. The solution of the stationary equations yields the thickness of the molten layer and its velocity of flow, dependent on cutting speed, gas jet formation and the viscosities and densities of the melt and the gas. A stability analysis of the stationary flow shows instabilities for a pressure gradient controlled melt removal. It is argued that these instabilities correlate with ripple formation on the cutting surface.Keywords
This publication has 3 references indexed in Scilit:
- Dynamic phenomena in laser cutting and cut qualityApplied Physics B Laser and Optics, 1986
- Physical Models And Technological Aspects Of Laser Gas CuttingPublished by SPIE-Intl Soc Optical Eng ,1984
- Ablation of materials subjected to laser radiation and high-speed gas flowsJournal of Applied Physics, 1980