Filtered Mass Density Function for Subgrid Scale Modeling of Turbulent Diffusion Flames

Abstract

Research concentrated on the following three issues: (1) development of the velocity filtered density function (VFDF); (2) development of the velocity-scalar filtered density function (VSPDF); and (3) implementation of the scalar filtered density function (SFDF) for LES of a turbulent methane jet flame. In efforts pertaining to (1)-(2), modeled transport equations for the VFDF and VSFDF were derived. These equations were solved with a new Lagrangian Monte Carlo scheme. The model predictions were compared with results obtained via conventional LES closures and with direct numerical simulation (DNS) data of a turbulent mixing layer. In efforts pertaining to (3), the LES/SFDF predictions of a methane jet-flame were used to construct the spatial and the compositional structure of the flame. Some preliminary results were obtained and were compared with experimental data obtained at the Sandia National Laboratories.

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 2002
Accession Number
ADA408007

Entities

People

  • Farhad A. Jaberi
  • Peyman Givi

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Boltzmann Equation
  • Boundary Layer
  • Chemical Reactions
  • Chemistry
  • Combustion
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Equations
  • Fluid Dynamics
  • Fokker Planck Equations
  • Reynolds Number
  • Stochastic Processes
  • Turbulence
  • Turbulent Diffusion
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Computational Fluid Dynamics (CFD)