Investigation of Chemistry-Turbulence Interactions Using DNS on the Cray T3E

Marc Lange () and Jürgen Warnatz
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Marc Lange: Universität Heidelberg, Interdisziplinares Zentrum für Wissenschaftliches Rechnen Im
Jürgen Warnatz: Universität Heidelberg, Interdisziplinares Zentrum für Wissenschaftliches Rechnen Im

A chapter in High Performance Computing in Science and Engineering ’99, 2000, pp 333-343 from Springer

Abstract: Abstract We use direct numerical simulation (DNS) to study the influence of turbulence in chemically reacting flows. First a short description of the governing equations, their numerical solution, and performance results on the Cray T3E are given. Then two applications are presented: The temporal evolution of a turbulent premixed methane-air flame is simulated using a chemical mechanism including 15 species and 84 elementary reactions. Isolated pockets of cold fresh gas are formed propagating into the burnt side of the flame. Examples are given for the combined influence of curvature and preferential diffusion on the chemical composition in the flame front. A correlation analysis shows that it is possible to use the formyl Radical as an indicator for the reaction intensity. The second application is the DNS of autoignition processes in turbulent hydrogen-air mixing layers. A reduction of ignition-delay time compared to the laminar case is observed and a recent result is presented concerning the locations where the first ignition spots occur.

Keywords: Direct Numerical Simulation; Heat Release Rate; Flame Front; Turbulent Combustion; Turbulent Flame (search for similar items in EconPapers)
Date: 2000
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-59686-5_31

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DOI: 10.1007/978-3-642-59686-5_31

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