Modeling turbulence  Physics or curve fitting
Abstract
It is noted that the presence of turbulence alters mixing and reaction times in chemically reactive flows. These effects in turn change the heat and mass transfer rates and hence the local and global dynamics of combustion systems. It is sought to describe the fundamental physical processes that must be modeled in order to understand reactive flow turbulence; it is then shown how detailed ab initio modeling of these phenomena can be used to help construct a phenomenological turbulence model for reactive flow. Three different aspects of reactive flow mixing are identified as focal points for the detailed modeling, and a number of important criteria are established which an accurate and consistent subgrid reactive flow mixing phenomenology should satisfy. One possible representation for such a generalized phenomenology is given.
 Publication:

Combustion in Reactive Systems; 7th International Colloquium on Gasdynamics of Explosions and Reactive Systems
 Pub Date:
 1981
 Bibcode:
 1981crs..proc..187B
 Keywords:

 Chemical Reactions;
 Fluid Dynamics;
 Turbulent Flow;
 Turbulent Mixing;
 Channel Flow;
 Compressible Fluids;
 Mathematical Models;
 Phenomenology;
 Turbulence Models;
 Vortices;
 Fluid Mechanics and Heat Transfer