- Author
- Baum, H. R. | Corley, D. M. | Rehm, R. G.
- Title
- Time-Dependent Simulation of Small-Scale Turbulent Mixing and Reaction.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Contract
- GRANT-AFOSR-ISSA-85-0026
- Book or Conf
- Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. Fall Technical Meeting, 1985. November 4-6, 1985. Philadelphia, PA. 2/1-2/4 AND Combustion Institute, Symposium (International) on Combustion, 21st. 1263-1270 pp. Munich, West Germany. August 3-8, 1986, 1986
- Keywords
- mathematical models
- Abstract
- A mathematical model of the transient diffusion controlled combustion of a gaseous blob of fuel imbedded in an oxidizing atmosphere is presented. It is intended ultimately as a computational "molecule" to be imbedded in direct simulations of large 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.