TIME: 3:30 PM

LOCATION: GMCS 314

SPEAKER: Gustaaf Jacobs, San Diego State University, Aerospace Engineering

ABSTRACT: Particle- and droplet-laden flows occur in many anthropogenic and natural environments. For example, the mixing of liquid fuel spray and/or solid fuel particles with turbulent gas flows determines the efficiency of many propulsion and energy systems. Environmental pollution is affected by the dispersion of aerosol particles in environmental carrier air flow. The number of particles in a process-scale environment is too large to simulate with first-principles based methods on current-day computational resources. Macro-scale models and simulation techniques are necessary to simulate such problems. The Eulerian–Lagrangian (EL) method combined with point particle modeling provides a natural framework. It uses Eulerian continuum models to describe the dynamics of the ambient flow and tracks individual volumeless particles along their Lagrangian paths. The point particle model reduction comes with a significant reduction of fidelity that in turn is frequently used as a poor excuse to use low fidelity model approximation methods. In a pursuit to enhance the fidelity of point particle based approaches, I have developed high-order approximation techniques and high-fidelity models, including a particle group model, multi-scale methods and high-order interpolation algorithms for Eulerian grid based method and Lagrangian particle methods. In this talk, I will review these model and numerical methods developments.

HOST: Jose Castillo