- Author
-
Baum, H. R.
|
Rehm, R. G.
- Title
- Time Dependent Simulation of Turbulent Combustion.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Contract
- AFOSR-ISSA-85-0026
- Book or Conf
- AFOSR/ONR Contractors Meeting on Turbulent Combustion. Demotakis, P. E., Editor. 1-3 pp. Pasadena, CA. July 1985 AND Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. 20th Fall Technical Meeting and National Bureau of Standards/Center for Fire Research. Annual Conference on Fire Research. Combined Technical Meetings. Abstracts. November 2-5, 1987. Gaithersburg, MD. 82/1-4 pp, 1987,
1987
- Keywords
-
mathematical models
- Abstract
- A mathematical model of the transient diffusion controlled combustion of a gaseous blob of fuel mbedded in an oxidizing atmosphere is presented. It is intended ultimately as a computational "molecule" to be imbedded in direct simulations of larger scale reacting flows. The model consists of an interacting three-dimensional strain vortex field which exactly satisfies the Navier-Stokes equations, an analytically determined Lagrangian representation of the mixing process, and reaction-diffusion equations in Lagrangian coordinates. Results are shown for the flow pattern, mixing, and a simple model of bulk aerosol coagulation. The combination of geometry-specific large scale simulations and local solutions to idealized small scale combustion problems whose parameters are determined by requiring consistency between scales could lead to global turbulent combustion calculations based solely on the equations governing the physical processes of interest.