Professor Said Elghobashi

Center for Energy and Propulsion Research, Reacting Gas Dynamics Laboratory,

University of California

时间：2019年4月26日（周五）上午10:00-11:00

地点：工学院1号楼 209会议室

Abstract:

Turbulent flows laden with liquid droplets or gas/vapor bubbles are ubiquitous in nature and engineering applications. In nature, examples include rain, waterfall mists, air bubbles in the upper ocean, and vapor bubbles in geysers. Engineering applications include liquid fuel sprays in all types of combustion engines, paint sprays, spray drying in the pharmaceutical industry as well as food processing, and water vapor bubbles in nuclear reactor cooling systems or those created by cavitation in the wakes of ship propellers, just to list a few. The lecture presents a review of recent developments in direct numerical simulations (DNS) of turbulent flows laden with droplets or bubbles. DNS of these flows are more challenging than those of flows laden with solid particles due to the surface deformation in the former. The numerical methods discussed are classified by whether the initial diameter of the bubble/droplet is smaller or larger than the Kolmogorov length scale and whether the instantaneous surface deformation is fully resolved or obtained via a phenomenological model.

Brief Biograph:

Said Elghobashi is a Distinguished Professor at the Department of Mechanical and Aerospace Engineering, University of California, Irvine. He is a member of the National Academy of Engineering, a fellow of the American Physical Society, the American Association for the Advancement of Science, and the American Society of Mechanical Engineers. He received the 2016 Senior Award of the International Conference on Multiphase Flow. His research focuses on understanding some of the fundamental properties of turbulence using the method of DNS. He received his MS (1971) from University of Southern California, and both the Ph.D. (1974) and D.Sc. (1999) from Imperial College, University of London.

欢迎校内外师生光临