Premixed turbulent flame simulation by a cellular automaton
Computation of turbulent premixed flames must account for the coupling of two strongly non-linear phenomena, namely, premixed flame propagation and turbulent flows. Direct numerical integrations of the differential equations governing these phenomena have not yet led to definitive results. An alternative numerical simulation method used a cellular automaton. In this model, the fluid particles are assumed to fill a square lattice where the unburned phase is transformed into the burned phase by means of a simple rule among neighbours, that simulates the actual premixed flame propagation by heat diffusion. After this propagation step, the system is subjected to a random shake, while preserving given statistical properties, to simulate the turbulent diffusion. The aim of this work is to incorporate the turbulence effect into this model using an eddy model, by introducing a distribution of discrete potential vortices placed through the lattice. The paper describes the characteristics of the cellular automaton used in the simulations, discusses the results obtained and presents conclusions and future research lines.
Bibliographic Reference: Paper presented: Second Workshop on Turbulent Premixed Combustion, Paris (FR), July 19-20, 1991
Availability: Available from (1) as Paper EN 36058 ORA
Record Number: 199110689 / Last updated on: 1994-12-02
Original language: en
Available languages: en