Abstract
We present numerical simulations of premixed spherical flames under µg conditions using the thermo-diffusive approximation. The employed numerical method is based on a finite volume discretization with explicit Runge-Kutta time integration, both of second order. A multiresolution technique is used to represent the solution on an adaptive, locally refined grid, which allows efficient and accurate computations at a reduced computational cost. We study the ignition limit, i.e. the critical radius for which the flame extinguishes, for varying Lewis numbers larger than unity. We also present fully three-dimensional simulations of initially stretched spherical flames and show their relaxation towards spherical flames, which justifies the one-dimensional spherically symmetric simulations.
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Roussel, O., Schneider, K. & Bockhorn, H. Numerical investigations on premixed spherical flames for Lewis numbers larger than unity. Microgravity Sci. Technol 17, 94–100 (2005). https://doi.org/10.1007/BF02872094
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DOI: https://doi.org/10.1007/BF02872094