Wed, Aug 26, 2020 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Mahsa Ebrahim, Assistant Professor of Mechanical Engineering Loyola Marymount University
Talk Title: Droplet Impingement and its Application in Electronic Cooling
Abstract: The need for cooling of high heat flux electronics is dramatically increasing as the technology developments make the electronic devices more compact and more powerful. Spray cooling is known to be one of the most effective methods of cooling high heat flux applications. However, common issues of dry-out and excessive liquid accumulation make spray cooling an unreliable technique for the cooling of high heat flux electronics. In order to better understand the fundamental physics and heat absorption of spray cooling, single droplet impingement on a heated surface has gained numerous attention. Although extensive research has been performed on single droplet impingement, the literature is sparse regarding the study of the heat transfer at high impact velocities and at micrometer size scale. Upon the impact of the droplet, the surface temperature drops dramatically and rapidly and at higher impact conditions this temperature drop is even more severe. In this work, the hydrodynamic and heat transfer regimes of a single droplet at high impact conditions were identified and mapped. Techniques were developed to enhance the heat absorption and the evaporation rate of each droplet by utilizing an impinging air flow to increase the impact velocity and to control the hydrodynamic phases after the impact and therefore to promote the utilization of spray cooling in high heat flux electronics.
Biography: Mahsa Ebrahim is an Assistant Professor of Mechanical Engineering at Loyola Marymount University. She received her Ph.D. degree in Mechanical Engineering from Villanova University and her M.S. and B.S. degrees in Mechanical Engineering from K.N.Toosi University of Technology in Iran. She spent a year of her Ph.D. at the University of Leeds in England as a research scholar. Her research focuses on numerical and experimental thermal-fluid science, spray cooling and droplet impingement, interfacial flows and phase interactions with applications in electronic cooling. She has been an active organizer of the IEEE-ITherm conferences since 2018.
Host: AME Department
More Info: https://usc.zoom.us/j/95959519165
WebCast Link: https://usc.zoom.us/j/95959519165
Audiences: Everyone Is Invited
Contact: Tessa Yao