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Large-Eddy Simulation of particle size distribution effects on turbulence in sprays
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Centre for Internal Cumbustion Engine Research Opus, CICERO (closed 20101231).
2008 (English)In: 46th AIAA Aerospace Sciences Meeting and Exhibit, 2008Conference paper, Published paper (Refereed)
Abstract [en]

In this work Large-Eddy Simulation and Lagrangian Particle Tracking methods are used to improve understanding of the dynamics of sprays for a range of particle loadings (i.e. 0.001 - 0.002 of volume fraction). We consider a subsonic particle laden round gas jet at Re = 104 and Ma = 0.3. The initial slip velocity between the particulate and the carrier phases is +0.25Uexit. The computational particle sizes are distributed in a range of Stokes numbers, 0.1 < Stp < 10. Thereby, interaction between the turbulent flow and the particle spectrum can be studied. Two particle mass loadings ψ = 0.3 and 0.6 are investigated corresponding to strong and very strong two-way momentum coupling. The results demonstrate that the mean Stokes number of the particle size distribution and the mass loading have a significant role in the observed dynamics of the jet. The relationship between the probability distribution function of the particles to gas slip velocities and the observed intermediate and large scale behaviour including mixing is pointed out.

Place, publisher, year, edition, pages
2008.
Series
46th AIAA Aerospace Sciences Meeting and Exhibit
Keyword [en]
Carrier phasis, Gas jet, Lagrangian particle tracking, Mass loadings, Particle loading, Particle spectra, Slip velocity, Stokes number, Two particles, Aerospace engineering, Atmospheric boundary layer, Distribution functions, Large eddy simulation, Particle size, Particle size analysis, Size distribution, Loading
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-153970Scopus ID: 2-s2.0-78149436049ISBN: 9781563479373 (print)OAI: oai:DiVA.org:kth-153970DiVA: diva2:762027
Conference
46th AIAA Aerospace Sciences Meeting and Exhibit, 7 January 2008 through 10 January 2008, Reno, NV, United States
Note

QC 20141110

Available from: 2014-11-10 Created: 2014-10-10 Last updated: 2014-11-10Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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