Direct Numerical Simulation of Turbulent Counterflow Nonpremixed Flames Presenter: Hong Im, University of Michigan Authors: H. G. Im,1 A. Trouvé,2 C. J. Rutland,3 P. G. Arias,1 P. Narayanan,2 S. Srinivasan,3 C. S. Yoo,4 1University of Michigan; 2University of Maryland; 3University of Wisconsin; 4Sandia National Laboratories;

This presentation provides an overview of our recent progress in terascale three-dimensional simulations of turbulent nonpremixed flames in the presence of a mean flow strain and fine water droplets. The study aims at bringing the state-of-the-art high-fidelity simulation capability to the next level by incorporating various advanced physical models for soot formation, radiative heat transfer, and lagrangian spray dynamics, to an unprecedented degree of details in high-fidelity simulation application. The targeted science issue is fundamental characteristics of flame suppression by the complex interaction between turbulence, chemistry, radiation, and water spray. The high quality simulation data with full consideration of multi-physics processes will allow fundamental understanding of the key physical and chemical mechanisms in the flame quenching behavior. Recent efforts on numerical algorithms and model development toward the targeted terascale 3D simulations are discussed and some preliminary results are presented.