MAE Seminar – Unification of Kinetic Theories Across Phases

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MAE Seminar – Unification of Kinetic Theories Across Phases

Dear Undergraduate and Graduate Students, Faculty, and Staff,
You are invited! UF Department of Mechanical and Aerospace Engineering’s Seminar Series
This is a perfect opportunity to enjoy some coffee, cookies, and captivating talks! These sessions feature amazing guest speakers, from academic trailblazers and industry movers to our very own faculty candidates showing off their expertise and fresh perspectives.
Come for the treats, stay for the engaging discussions, and connect with fellow MAE enthusiasts. Everyone is welcome!

Unification of Kinetic Theories Across Phases

Feb 20, 2025, at 12:50pm, Location: MAE-A 303

Dr. Jaeyun Moon
Postdoctoral Scholar
Sibley School of Mechanical and Aerospace Engineering
Cornell University

Abstract
Microscopic understanding of various thermal properties in liquids is crucial for advancing numerous energy applications, from nuclear reactors to batteries. However, inherent dynamic atomic disorder and absence of structural periodicity in liquids pose significant challenges for developing rigorous microscopic theories of their thermal behavior. Consequently, many prior works have relied on more established solid phase perspectives, of questionable relevance to liquids. In this talk, I introduce a novel, unified framework that concurrently addresses the three classical phases of matter—solid, liquid, and gas. Our results show that atomic dynamics in liquids can be described by a combination of both solid-like and gas-like degrees of freedom. This dual perspective enables a comprehensive description of key thermal properties, including heat capacity, thermal conductivity, and viscosity across all three phases of matter. These insights offer a promising pathway toward universal approaches to understanding complex atomic motion across phases of matter.

Biography
Dr. Jaeyun Moon is currently a postdoctoral researcher at Cornell University. Prior to joining Cornell, he was a postdoctoral scholar in the Materials Science and Technology Division at Oak Ridge National Laboratory. He received B.S. in Mechanical Engineering from Georgia Institute of Technology and M.S. and Ph.D. in Mechanical Engineering from California Institute of Technology. During his Ph.D., he was a visiting scientist at Stanford University and SLAC National Laboratory. He received a Samsung Fellowship, Resnick Graduate Fellowship, and an Acosta Fellowship. Dr. Moon received the International Union of Crystallography Young Scientist Award for his work in thermal properties of glasses.

MAE Faculty Host: YoungSup Song