LES/PDF based modeling of soot-turbulence interactions in turbulent flames

Pratik Donde, Venkat Raman, Michael E. Mueller, Heinz Pitsch

Research output: Contribution to journalConference article

44 Scopus citations

Abstract

A large eddy simulation (LES)/probability density function (PDF) approach is used to describe the small-scale soot-turbulence-chemistry interactions. The PDF approach directly evolves the joint statistics of the gas-phase scalars and a set of moments of the soot number density function. This LES/PDF approach is then used to simulate a turbulent natural gas jet diffusion flame. Since the PDF equation is high dimensional, a Lagrangian method formulated in cylindrical coordinates is coupled to the Eulerian solution technique for the LES flow equations. The LES/PDF simulations show that soot formation is highly intermittent and is always restricted to the fuel-rich region of the flow. The PDF of soot moments has a wide spread leading to a large subfilter variance. Further, the conditional statistics of soot moments conditioned on mixture fraction and reaction progress variable show strong correlation between the gas phase composition and soot moments.

Original languageEnglish (US)
Pages (from-to)1183-1192
Number of pages10
JournalProceedings of the Combustion Institute
Volume34
Issue number1
DOIs
StatePublished - 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

Keywords

  • Large eddy simulation
  • Non-premixed turbulent flames
  • Probability density function
  • Soot
  • Soot-turbulence-chemistry interactions

Fingerprint Dive into the research topics of 'LES/PDF based modeling of soot-turbulence interactions in turbulent flames'. Together they form a unique fingerprint.

Cite this