Mapping Closures for Turbulent Combustion

Abstract

The overall objective of the research program is to develop and test an improved model for the process of molecular diffusion in turbulent reactive flows. In application to turbulent combustion, a major shortcoming of existing models is that they are non-local in composition. A model has been developed, based on the construction of a Euclidean minimum spanning tree (EMST). This model is inspired by the mapping closure, and reduces to it in the case of a single composition. In general, the model is asymptotically local, and hence overcomes a major flaw in previous models. Additionally, studies have been made of stochastic Lagrangian models for turbulent reactive flows; and an exact expression has been obtained for the probability density function of temperature (or other random quantities) in statistically stationary turbulence.

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1993
Accession Number
ADA265671

Entities

People

  • Stephen B. Pope

Organizations

  • Cornell University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Combustion
  • Computational Fluid Dynamics
  • Construction
  • Diffusion
  • Equations
  • Fluid Dynamics
  • Fluid Mechanics
  • Mechanical Properties
  • Mechanics
  • Particles
  • Probability Density Functions
  • Stationary
  • Stratified Fluids
  • Students
  • Turbulence
  • Universities

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Computational Fluid Dynamics (CFD)
  • Systems Analysis and Design