TR 150 B06 Reduced kinetic models for combustion processes close to walls


Side-Wall Quenching
REDIM für Flammenauslöschung an einer kalten Wand


  • The trend towards downsizing, e.g. in internal combustion engines, leads to questions about heat losses, surface reactions and chemically reacting flows in boundary layers.
  • Flame-wall interactions (FWI) are becoming the focus of research.
  • Experimental and numerical investigation of FWI.
  • Mechanisms with a high number of species and reactions have been developed, which lead to time- and resource-consuming simulations.
  • Reduced models are needed in order to be able to carry out technically relevant simulations with an appropriate expenditure of time and resources.


  • Development of efficient but accurate reduced models for flames near walls that capture relevant phenomena such as side-wall quenching.
  • Improvement of the already developed reaction-diffusion manifolds (REDIMs) to better describe the formation of pollutants as well as the adaptation of the models for alternative fuels.


  • The REDIM method is a timescale-based model reduction concept with a particular focus on the coupling of transport and chemistry
  • Algorithm for hierarchical increase of REDIM dimensions
  • Strategies for Implementing REDIM Models in Large Eddy Simulations (LES)
  • Improving the reduced models by iteratively optimizing the gradient estimates using LES calculations


  • Expansion of REDIMs for alternative fuels and flame retardants.
  • Focus on pollutant formation when developing reduced models