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Related Experiment Video

Updated: Oct 28, 2025

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

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Nonlinear dynamics of flame fronts with large-scale stabilizing effects.

Basile Radisson1, Bruno Denet1, Christophe Almarcha1

  • 1Aix Marseille Université, Centre National de la Recherche Scientifique, Centrale Marseille, IRPHE UMR 7342, 13384 Marseille, France.

Physical Review. E
|July 17, 2021
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Summary

Gravity and heat loss significantly alter premixed flame dynamics over time, even if weak initially. These factors may explain complex flame patterns and topological anomalies seen in recent studies.

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Area of Science:

  • Fluid dynamics
  • Combustion science
  • Thermodynamics

Background:

  • Premixed flames exhibit complex dynamics influenced by various factors.
  • Understanding long-time nonlinear behavior is crucial for combustion modeling.
  • Previous studies often focused on linear regimes, potentially overlooking long-term effects.

Purpose of the Study:

  • To investigate the impact of gravity and heat loss on the long-time nonlinear dynamics of premixed flames.
  • To determine if weak influences in the linear regime can significantly alter long-term flame behavior.
  • To explore the potential role of these factors in observed flame patterns and topological anomalies.

Main Methods:

  • Nonlinear dynamics analysis
  • Computational fluid dynamics (CFD) simulations
  • Theoretical modeling of flame propagation

Main Results:

  • Gravity and heat loss significantly modify long-time nonlinear dynamics of premixed flames.
  • Even weak influences in the linear regime can lead to substantial changes in long-term behavior.
  • These effects can induce new cellular structures on the flame front.

Conclusions:

  • Gravity and heat loss act as large-scale stabilizing effects on premixed flames.
  • These factors are likely responsible for the formation of persistent patterns observed in experimental and numerical studies.
  • The findings may also elucidate statistical anomalies in flame front topology.