Percolating reactive waves: Flames in the discrete regime (INVITED)

Abstract eng:
An overview of investigations into flame propagation in discrete systems is given. Discrete effects become pronounced when the heat release time scale of a source is much less than the characteristic time of diffusion between sources. Under these conditions, flame propagation becomes dominated by local fluctuations in particle concentration, sharing many characteristics with directed percolation. Attempts to model such systems using traditional, continuum models that assume a homogeneous media would result in erroneous predictions of flame dynamics. Attempts to experimentally realize such systems are discussed, and the need for a microgravity platform with duration on the order of minutes is articulated. Key experimental features of flames in the discrete source propagation regime are identified, and planning for an upcoming sounding rocket experiment is discussed. OVERVIEW

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