The Rate of Expansion of Spherical Flames

Details The Rate of Expansion of Spherical Flames The Rate of Expansion of Spherical Flames

2005-05-14

arxiv.org/abs/physics/0505102v1

Physics

Fluid Dynamics

18 pages, 9 Figures in 18 EPS files

Scientific paper

In this paper we investigate the acceleration of the expansion of premixed spherical flames and evolution of the cellular patterns on their surfaces. An asymptotic model is used for the simulations and a spectral numerical algorithm is employed to study flames over large time intervals. Numerous numerical experiments indicate that for large enough time intervals the acceleration of two-dimensional expanding flame ceases and the expansion rate stabilizes to a value significantly exceeding the burning rate. The importance of the effect of forcing was also confirmed and the validity of sectorial simulations of closed flames was studied in order to justify prospective use of the Fourier spectral model for the three-dimensional spherical flames.

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