Title :
Effect of the vapour flow on the liquid wall during deep penetration laser welding
Author :
Amara, E.H. ; Fabbro, R. ; Hamadi, F. ; Allalou, N. ; Achab, L. ; Mebani, N.
Author_Institution :
Laser Mater. Process. Group, CDTA, Algiers
Abstract :
In our work, we develop a study of the last mechanism by a numerical modelling approach. We deal with a multiphase problem (gas and liquid), where the gases are the surrounding air and the metallic vapour in the keyhole, and the liquid is the melted metal. Boundary conditions are deduced by using a ray-tracing procedure to calculate the keyhole shape and the local absorbed intensity, and then the Navier-Stokes equation are solved in the compressible case for the metallic vapour phase, and in the incompressible case for the liquid phase and the surrounding air
Keywords :
Navier-Stokes equations; compressible flow; laser beam welding; multiphase flow; ray tracing; Navier-Stokes equation; compressible case; deep penetration laser welding; incompressible case; keyhole; keyhole shape; liquid phase; liquid wall; local absorbed intensity; metallic vapour phase; multiphase problem; numerical modelling approach; ray-tracing procedure; surrounding air; vapour flow; Boundary conditions; Fluid flow; Gas lasers; Gases; Laser modes; Navier-Stokes equations; Numerical models; Ray tracing; Shape; Welding;
Conference_Titel :
Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on
Conference_Location :
Munich
Print_ISBN :
0-7803-8974-3
DOI :
10.1109/CLEOE.2005.1568436
