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Nonlinear Engineering

Modeling and Application

Editor-in-Chief: Nakahie Jazar, Gholamreza

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CiteScore 2016: 0.77

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2192-8029
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Aerosol Flow Through a Converging-Diverging Micro-Nozzle

Sourin Bhattacharya
  • Corresponding author
  • Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND, USA
  • Department of Mechanical Engineering, North Dakota State University, Fargo, ND, USA
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/ Artur Lutfurakhmanov
  • Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND, USA
  • Department of Mechanical Engineering, North Dakota State University, Fargo, ND, USA
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/ Justin M. Hoey
  • Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND, USA
  • Department of Mechanical Engineering, North Dakota State University, Fargo, ND, USA
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/ Orven F. Swenson
  • Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND, USA
  • Department of Physics, North Dakota State University, Fargo, ND, USA
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/ Zakaria Mahmud / Iskander S. Akhatov
  • Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND, USA
  • Department of Mechanical Engineering, North Dakota State University, Fargo, ND, USA
  • Center for Micro and Nanoscale Dynamics of Dispersed Systems, Bashkir State University, Ufa, Russia
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Published Online: 2013-10-28 | DOI: https://doi.org/10.1515/nleng-2013-0020

Abstract

Cold spray is a material deposition process used to deposit metallic features for use in applications such as corrosion prevention, dimensional correction and repair, and wear resistant coatings. Micro Cold Spray Direct Write (MCS-DW) is a variant of the cold spray process in which metal particles are accelerated and focused to print fine features on flexible and rigid substrates with no postprocessing required. This paper presents results of numerical studies on the flow of 2 µm and 6 µm diameter silver particles through a converging-diverging micro nozzle with helium gas. The flow of helium was simulated by solving Navier Stokes equation using commercial software. The trajectory and velocity of the aerosol particles were determined using a Lagrangian particle tracking algorithm with a combination of Stokes drag force and Saffman lift force acting on the particles. A comparison of the effect of different corrections applied to Stokes and Saffman forces as well as the effect of Magnus force on the trajectory and velocity of aerosol particles is studied. The effect of particle rotation creating Magnus force is found negligibly small compared to Saffman force for particles of 2 µm diameter, however, the effect is found to be significant for particles of 6 µm diameter. A proposed converging-diverging nozzle is shown capable of accelerating silver particles to velocities as high as 600 m/s and enables aerosol beam widths as thin as 50 µm.

About the article

Published Online: 2013-10-28

Published in Print: 2013-12-01


Citation Information: Nonlinear Engineering, ISSN (Online) 2192-8010, ISSN (Print) 2192-8029, DOI: https://doi.org/10.1515/nleng-2013-0020.

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