In direct laser deposition process, metal powder is directly fed with carrier gas through the coaxial nozzle into the melt pool created by the laser to form the solid parts. Many operational parameters of the process depend on the characteristic of the powder stream structure below the exit of the coaxial nozzle. In this paper, a computational approach is developed for the simulation of the gas-particle flow in the coaxial nozzle. By taking into account the nozzle geometry and operating parameters, such as width and inclination angle of powder passage and carrier gas velocity, the developed computational code allows the simulation, optimization and control of the delivery of the metal powders.

Meeting Name

15th Annual Solid Freeform Fabrication Symposium (2004: Aug. 2-4, Austin, TX)


Mechanical and Aerospace Engineering


This research was supported by the National Science Foundation Grant Number DMI- 9871185, the grants from the U.S. Army Aviation and Missile Command (AMCOM) and U.S. Air Force Research Laboratory contract # FA8650-04-C-5704. Their support is greatly appreciated.

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type




Publication Date

04 Aug 2004

Included in

Manufacturing Commons