Direct simulation of an isothermal nonpremixed flame in homogeneous turbulent shear flow
Abstract
The statistics of strain rates, vorticity, and scalar dissipation and the reactive interface characteristics were calculated for an isothermal twostream nonpremixed reaction in both a homogeneous shear flow and a decaying isotropic turbulence, using direct numerical simulations. The chemical reaction considered is an isothermal reaction between two species diluted in an inert gas, such that the density of the fluid remains essentially invariant throughout the flow. The governing equations are the instantaneous threedimensional NavierStokes, mixture fraction, and continuity equations. Results indicate that a common structure for the strain rate field exists in both isotropic and homogeneous shear flows. The decaying isotropic flow retains this strain structure throughout the latter stages of flow development due to selfpreservation.
 Publication:

AIAA, Aerospace Sciences Meeting
 Pub Date:
 January 1990
 Bibcode:
 1990aiaa.meetR....E
 Keywords:

 Digital Simulation;
 Isothermal Flow;
 Premixed Flames;
 Shear Flow;
 Turbulent Flow;
 Combustible Flow;
 Isotropic Turbulence;
 Strain Rate;
 Vorticity Equations;
 Fluid Mechanics and Heat Transfer