(510e) Industrial-Scale Large Eddy and Direct Numerical Simulation: Application to Reactive Jets
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Engineering Sciences and Fundamentals
Turbulent and Reactive Flows and Flow Characterization
Thursday, November 19, 2020 - 8:30am to 8:45am
In this work, we show how GPUs (as opposed to CPUs) can make direct numerical simulation (DNS) of industrial mixing systems practical and timely. We begin by introducing the concepts governing GPU-performance, as applied to lattice-Boltzmann simulations. We then show how, given identical algorithms, a single scientific GPU can execute simulations two to three orders-of-magnitude faster than a single CPU. We then present various criteria for monitoring the convergence from large-eddy simulation (LES) to direct numerical simulation, within the context of the Taylor and Kolmogorov scales. We then apply these criteria to study blending, energy dissipation, and reaction rates in a turbulent jet. The effects of simulation resolution on runtime and results are discussed.