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Article
Numerical Simulation of Metallic Powder Flow in a Coaxial Nozzle for the Laser Aided Deposition Process
Journal of Materials Processing Technology
  • Heng Pan, Missouri University of Science and Technology
  • Frank W. Liou, Missouri University of Science and Technology
Abstract

Laser aided deposition process offers the ability to make a metal component directly from CAD drawings. Analysis of metallic powder flow in the feeding system is of particular significance to researchers in order to optimize this technique. Powder flow simulation holds a critical role in understanding flow phenomenon so as to ensure proper design and sound functionality of the coaxial nozzle. Numerical study of metallic powder flow in the coaxial nozzle for laser aided deposition is, however, barely existent. This is partially because not all of gas-atomized powders and none of water-atomised powders can be considered spheres and an accurate and economic modeling approach in describing non-spherical powder dispersion behavior can rarely be seen. To quickly simulate realistic powder flow and also meet the practical requirement for design optimization of the coaxial nozzle, a stochastic model, which considers particle shape effects, is developed. The validity of the model is demonstrated through comparison with experiment. The application of the model to the evaluation of various nozzle geometrical configurations is shown.

Department(s)
Mechanical and Aerospace Engineering
Keywords and Phrases
  • Coaxial Nozzle,
  • Laser Aided Deposition Process,
  • Metallic Powder,
  • Numerical Simulation
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2005 Elsevier, All rights reserved.
Publication Date
1-1-2005
Citation Information
Heng Pan and Frank W. Liou. "Numerical Simulation of Metallic Powder Flow in a Coaxial Nozzle for the Laser Aided Deposition Process" Journal of Materials Processing Technology (2005) ISSN: 0924-0136
Available at: http://works.bepress.com/heng-pan/4/