SEMINAR Department of Aerospace Engineering Multiscale and multiphysical aspects of energy deployment in chemically-reacting flows Monday, April 13, 2015, 11:45 a.m. | HRBB 702 Javier Urzay Engineering Research Associate Stanford University Center for Turbulence Research jurzay@gmail.com ABSTRACT The focus of this presentation will be on hydrodynamic phenomena introduced by the release of energy in chemically-reacting flows. The scope of this challenging topic is undoubtedly broad and is related to -for instance- the concomitant generation of kinetic energy from explosions, detonations, deflagrations, burning sprays, lasers, plasmas, fueled particles, swimmers, and molecular motors. In all those scenarios, velocity disturbances, oftentimes non-linearly coupled with the energydeployment dynamics, are generated from energy transfer across multiple scales. In particular, I will elaborate on two computational investigations that illustrate some aspects of these phenomena in relatively complex flows: The inter-scale energy-transfer dynamics in turbulent combustion, and the conversion of electromagnetic energy into detrimental flows in plasma-assisted adaptive lenses for aero-optics. BIO Javier is an Engineering Research Associate at the Stanford University Center for Turbulence Research (CTR) since 2012. At CTR he has worked on multidisciplinary problems related to combustion, plasmas, particle-laden flows, microhydrodynamics, and uncertainty quantification. He obtained his B.Sc. and M.Sc. degrees in Mechanical Engineering in 2005 from the Carlos III University of Madrid, Spain, and his M.Sc. and Ph.D. degrees in Aerospace Engineering in 2010 from the University of California San Diego, where he graduated with a number of high distinctions in teaching and research. For his Ph.D. thesis, Javier worked on fundamental problems in theoretical fluid mechanics and combustion physics under the guidance of Prof. Forman A. Williams. After graduation, he was a postdoctoral fellow for one year at the french computational fluid dynamics laboratory CERFACS in Toulouse, where he worked on spray combustion instabilities in turbopropulsion Figure 1: OH (red) and density gradient (solid) contours in a supersonic H2/Air mixing layer. Figure 2: Electron density and axial vorticity isocontours in a plasma lens.