Announcements

Seminar by Dr. Emre Cenker / Measurements of Nanoparticles with Laser Induced Incandescence (LII)

Author: Collage of Engineering
Time: 11:00
Location: ENG 208

******************************

KOC UNIVERSITY

COLLEGE OF ENGINEERING

ENGINEERING SEMINAR

******************************

 

 

Speaker: Dr. Emre Cenker, Lecturer, Department of Mechanical Engineering, University of Birmingham, UK.

Title: Measurements of nanoparticles with Laser Induced Incandescence (LII)

Date:  29 March 2019

Time: 11:00-12:00

Place: ENG 208

Host: Metin Muradoglu

 

Abstract:

Laser-based optical diagnostics provide critical insight into complex processes with high temporal and spatial resolution. They contribute to gains in fundamental understanding, provide validation data for modeling and simulation, and support the optimization of practical processes. A dramatic advancement of the diagnostics capabilities over the last decades has substantially contributed to improved performance of energy-related processes, including combustion – a technology that will be providing the majority of the world’s energy needs over the coming decades. Combustion represents an intricate interaction of chemical reaction, turbulent flow, and heat transfer with a wide variety of applications. Carbon particulate matter (PM) is an undesired byproduct of combustion processes and is detrimental to human health and the environment. To minimize emissions, and design new filtration technologies, a better understanding of the underlying mechanisms of PM formation is required.

This presentation will introduce a powerful in-situ measurement technique – Laser Induced Incandescence (LII) – for characterizing PM as well as engineered metal nanoparticles. In this technique, nanoparticles are heated rapidly via absorption of light from a laser pulse and the subsequent blackbody radiation is recorded during the heat-up and cooling phase. Quantitative particle-size information is obtained from a best-fit comparison of the temporal signal decay and simulations based on the particles’ energy and mass balance equations. The talk includes a deeper analysis of rapid heating effects such as thermal annealing and sublimation of nanoparticles which lead to a permanent change in their optical properties and its primary particle size, respectively.

 

Biography:

Emre has a B.Sc. in Mechanical Engineering from Koç University, a M.Sc. in Automotive Engineering from the RWTH Aachen and a Ph.D. summa cum laude from École Centrale Paris and University of Duisburg-Essen. Following his studies, he conducted postdoctoral research at KAUST and Sandia National Laboratories for over four years. Last year he became a faculty member at the University of Birmingham and recently joined Aramco to perform research within the fuel technology division. Emre previously worked as a topic organizer in engine combustion network, spray combustion consortium, and international laser-induced incandescence workshops. He is an active Turkish Educational Foundation (TEV) alumnus.