A fully non-linear model for atomization of high-speed jets

Sam S. Yoon, Stephen D. Heister

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A non-linear model has been developed to assess the time evolution of an axisymmetric liquid jet using a boundary-element method. Vorticity transported from the boundary layer in the orifice passage to the free surface is modeled using a potential ring vortex placed at the orifice exit plane. The vortex strength is uniquely determined from the Kutta condition and information regarding the boundary layer thickness at the orifice exit plane. It is shown that primary breakup can occur even in the absence of the gas phase. Using a secondary stability analysis after Ponstein [Appl. Scientific Res. 8 (1959) 425], the size of the droplets is estimated based on the size of the ring-type structures shed from the periphery of the jet. Computed droplet sizes are in reasonable agreement with experimental data, although turbulence effects obscure some comparisons.

Original languageEnglish
Pages (from-to)345-357
Number of pages13
JournalEngineering Analysis with Boundary Elements
Issue number4
Publication statusPublished - 2004 Apr
Externally publishedYes

Bibliographical note

Funding Information:
The authors gratefully acknowledge the support of Dr Mitat Birkan and the AFOSR under grant number F49620-99-1-0092.


  • Atomization
  • Jet
  • Vortex-ring

ASJC Scopus subject areas

  • Analysis
  • General Engineering
  • Computational Mathematics
  • Applied Mathematics


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