Accession Number:

ADA273992

Title:

Simulations of Diffusion-Reaction Equations with Implications to Turbulent Combustion Modeling

Descriptive Note:

Contractor rept.

Corporate Author:

INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s):

Report Date:

1993-10-01

Pagination or Media Count:

44.0

Abstract:

An enhanced diffusion-reaction reaction system DRS is proposed as a statistical model for the evolution of multiple scalars undergoing mixing and reaction in an isotropic turbulence field. The DRS model is close enough to the scalar equations in a reacting flow that other statistical models of turbulent mixing that decouple the velocity field from scalar mixing and reaction e.g. mapping closure model, assumed-pdf models cannot distinguish the model equations from the original equations. Numerical simulations of DRS are performed for three scalars evolving from non-premixed initial conditions. A simple one-step reversible reaction is considered. The data from the simulations are used 1 to study the effect of chemical conversion on the evolution of scalar statistics, and 2 to evaluate other models mapping-closure model, assumed multivariate beta-pdf model. Turbulent combustion modeling, Scalar mixing, Mixingreaction.

Subject Categories:

  • Fluid Mechanics
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE