NUMERICAL MODELLING OF TURBULENCE AND COMBUSTION PROCESSES IN STRONGLY SEPARATED, NON-STATIONARY FLOWS

WE PROPOSE TO DEVELOP A THREE-DIMENSIONAL COMPUTER CODE INCORPORATING RENORMALIZATION-GROUP (RNG) BASED DIFFERENTIALTRANSPORT MODELS FOR TURBULENT HEAT, MASS, MOMENTUM TRANSFERAND COMBUSTION PROCESSES IN STRONGLY NON-STATIONARY, STRONGLY SEPARATED INTERNAL FLOWS. PRELIMINARY RESULTS FOR APPLICATION OF THESE NOVEL, NEW MODELS TO NON-STATIONARY ANDSEPARATED FLOWS, INCLUDING FLOW OVER A BACKWARD-FACING STEP,OSCILLATORY PIPE FLOW, AND SHOCK-INDUCED SEPARATION ON AN AIRFOIL, SUGGEST THAT THE MODELS WILL BE VERY EFFECTIVE FOR THIS CLASS OF DIFFICULT OF FLOWS. IN ADDITION, RECENT EXTENSIONS OF THE RNG METHOD GIVE A DESCRIPTION OF TURBULENTCOMBUSTION THAT PROMISES SIGNIFICANT ADVANCES IN OUR ABILITYTO MODEL THESE COMPLEX PROBLEMS.