Microgravity - Science and Technology

, Volume 17, Issue 3, pp 94–100 | Cite as

Numerical investigations on premixed spherical flames for Lewis numbers larger than unity

  • Olivier Roussel
  • Kai Schneider
  • Henning Bockhorn


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.


Lewis Number Finite Volume Scheme Flame Velocity Ignition Limit Spherical Flame 
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Copyright information

© Z-Tec Publishing 2005

Authors and Affiliations

  • Olivier Roussel
    • 1
  • Kai Schneider
    • 2
    • 3
  • Henning Bockhorn
    • 1
  1. 1.Institut für Technische Chemie und Polymerchemie(TCP)Universität Karlsruhe (TH)KarlsruheGermany
  2. 2.Laboratoire de Modélisation et Simulation Numérique en Mécanique et Génie des ProcédésCNRS et Université d’ Aix-MarseilleMarseille cedex 20France
  3. 3.Centre de Mathématiques et d’InformatiqueUniversité d’Aix-Marseille IMarseille cedex 13France

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