Woodruff School of Mechanical Engineering

Seminar

Title:

Diagnostics for Ultra-High-Speed and Reacting Multiphase Flows

Speaker:

Dr. Daniel R. Guildenbecher

Affiliation:

Sandia National Laboratories

When:

Tuesday, September 10, 2019 at 11:00:00 AM

Where:

MRDC Building, Room 2407

Host:

Prof. Ellen Yi Chen Mazumdar
ellen.mazumdar@gatech.edu

Abstract

Within the last decade, high-speed digital camera technologies have steadily improved and their use in science and engineering has become ubiquitous. Yet, extracting quantitative measurements from video results remains challenging for many applications. This presentation will focus on development of new diagnostics to address many of the extreme imaging challenges at Sandia National Laboratories. To recover the missing third-dimension, we will discuss the development and application of digital in-line holography (DIH), plenoptic imaging, and multi-camera triangulation. To minimize image degradation due to thermal gradients and shock-waves, we will discuss phase-conjugate and x-ray diagnostics. Finally, to maximize information when optical access is limited, optical time of flight sectioning will be presented. These diagnostics will be demonstrated for a range of applications from liquid sprays, combustion, and energetics at imaging speeds up to millions of frames per second.


Biography

Daniel R. Guildenbecher is a Principle Member of the Technical Staff at Sandia National Laboratories in Albuquerque, New Mexico. Dr. Guildenbecher’s research emphasizes experimental diagnostics of multiphase flows, particularly those involving particle transport, liquid fragmentation, combustion, and energy conversions. Dr. Guildenbecher received his Ph.D. in Mechanical Engineering from Purdue University in 2009. Prior to joining Sandia, Dr. Guildenbecher was a Visiting Professor at the Karlsruhe Institute of Technology (2009-2010) and Purdue University (2010-2011).

Notes

Refreshments will be served.