NONPREMIXED REACTION IN HOMOGENEOUS TURBULENCE - DIRECT NUMERICAL SIMULATIONS

The authors provide a generalization of G. Kosaly's result and, by use of direct numerical simulation (DNS), further investigate the validity of Toor's hypothesis and the revisions proposed by Kosaly. In this application DNS refers to the numerical solution of the aerothermodynamic transport equations of turbulent reacting flows for the detailed time development of the flow field. This technique uses no closure modeling, and no assumptions are made pertaining to the turbulent behavior of the fluid. DNS has proven very useful in computational studies of turbulence and is used here as a means of performing experiments on the computer. This approach offers advantages over laboratory experiments in that the instantaneous values of the hydrochemical variables are known at all locations at each time step, allowing better statistical analysis of the data.