Dynamic mesh adaption for supersonic combustion waves modeled with detailed reaction mechanisms

Dynamic mesh adaption has emerged as a powerful tool to reduce the <br>numerical cost of CFD problems. We use this technique to resolve the <br>disparate physical scales of reactive flow problems. <br>In our numerical scheme, we combine the dynamic mesh adaption with <br>an explicit as well as implicit upwind finite volume scheme, <br>time scale splitting, adaptive local time stepping, and source term <br>integration methods, to solve stiff systems of ODEs. <br>Thus we obtain the possibility to simulate on a workstation with <br>moderate numerical cost demanding, time-dependent <br>problems in two space dimensions modeled with a detailed chemical reaction <br>mechanism. <br>To validate the whole numerical scheme, test cases with a single irreversible <br>reaction (reactive Euler equations) and hydrogen-oxygen combustion <br>(8 species plus diluent with detailed reaction mechanism) are simulated. <br>The results are compared with ZND solutions, other numerical simulations, <br>and experimental data concerning ignition time, velocity of the reaction <br>front, detonation cell size, etc. and show good accordance.

Author dc:creator

• Geßner, Thomas

Contributors dc:contributor

• Kröner, Dietmar

• Steifes Differentialgleichungssystem
• unstrukturiertes Gitter
• Splittingverfahren
• Stiff system of equations
• finite volume scheme
• unstructured mesh
• time scale splitting

Repository record source_url

https://freidok.uni-freiburg.de/data/292

OAI identifier oai:identifier

oai:freidok.uni-freiburg.de:292