Candidate Seminar – Probing Light Scattering & Absorption: Optical Diagnostics for Multiphase & Combusting Flo

Details

Probing Light Scattering and Absorption: Optical Diagnostics for Multiphase and Combusting Flows

Thursday, December 8, 2022, at 12:50 pm
Location: In-Person MAE-A, Room 303

Daniel R. Guildenbecher
Distinguished Member of the Technical Staff, Sandia National Laboratories

Abstract
A multiphase flow is broadly defined as any fluid dynamics process in which mass, momentum, or energy is transferred between two or more thermodynamic phases or materials. By this definition, almost all relevant engineering flows are, at least to some degree, multiphase. This talk will review several multiphase flows of interest to the national security missions of Sandia National Laboratories, including liquid atomization, explosive fragmentation, and post-detonation fireballs. We will discuss the advancement of high-speed digital holography, extinction imaging, and laser-induced incandescence to enable quantitative measures in these harsh environments. Despite the breadth of this work, we will show how all these diagnostics are fundamentally understood to quantify the scattering and absorption of light described by Maxwell’s equations.

Biography
Daniel R. Guildenbecher is a Distinguished Member of the Technical Staff at Sandia National Laboratories in Albuquerque, New Mexico. Dr. Guildenbecher’s research develops experimental diagnostics of multiphase and combusting flows, including applications to explosives, energetics, hypersonics, and other topics of interest to Sandia’s national security missions. Dr. Guildenbecher received his Ph.D. in Mechanical Engineering from Purdue University in 2009. Before joining Sandia, Dr. Guildenbecher was a Visiting Professor at the Karlsruhe Institute of Technology (2009-2010) and Purdue University (2010-2011). He is an Associate Fellow of the American Institute of Aeronautics and Astronautics and a Member of the Optical Society of America.

MAE Faculty Host: Ryan Houim