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UID:event-52567@qmeet.net
DTSTAMP:20260828T101549Z
LAST-MODIFIED:20260828T070826Z
DTSTART:20260831T153000
DTEND:20260831T170000
SUMMARY:EPSSI Seminar: Dr. Martin Erinin
DESCRIPTION:This event will be held in the GLRC. Refreshments and a social 
 will be held at 3:30 p.m. outside of room GLRC 202\, with the lecture to f
 ollow at 4 p.m. in GLRC 202. Dr. Martin Erinin\, Assistant Professor\, of 
 the University of Michigan will give a talk on Monday\, August 31st. The t
 itle of the talk is "Breaking waves: the dynamics of droplets and the effe
 cts of surfactants" Abstract: Breaking waves play a key role in controllin
 g the exchange of mass\, momentum\, and energy between the ocean and the a
 tmosphere. Because wave breaking is a highly non-linear and transient phen
 omena\, a number of physical processes associated with it are poorly under
 stood and modeled. In this talk\, I will present two topics related to bre
 aking waves. First\, through laboratory experiments in a large-scale wind 
 wave tunnel\, and using a custom designed high-speed and high-resolution i
 nline holographic system\, I will characterize the dynamics and statistics
  of droplets with diameters ranging from 30 to 4000 micrometers. I will di
 scuss how the droplet velocity and acceleration statistics can be interpre
 ted as a combination of recently emitted droplets and droplets being trans
 ported by the turbulent boundary layer. This transport can be represented 
 by a transient transport model for inertial droplets. These results at rel
 atively high wind speed have implications for the modeling of tropical cyc
 lone intensification. Second\, I will discuss the role of surfactants on b
 reaking waves. While surfactants are common on the ocean surface\, and the
 ir impact is related to biological activity and pollution\, our fundamenta
 l understanding of their effect on breaking waves and fluxes is limited. W
 e show\, through the use of carefully controlled laboratory experiments\, 
 which vary surfactant concentration\, and through numerical simulations\, 
 that the effects of surfactants on a plunging breaking wave is controlled 
 by the surface tension gradients. The surface tension gradients are shown 
 to be caused by surface compression and dilatation during the focusing of 
 the breaker and induce Marangoni stresses along the wave crest\, which sig
 nificantly modify the breaking process. Surprisingly\, the ambient surface
  tension of the undisturbed water surface plays a secondary role. Bio: Dr.
  Martin Erinin is an Assistant Professor in Mechanical Engineering at the 
 University of Michigan. Previously\, he worked as a postdoctoral researche
 r in the Department of Mechanical & Aerospace Engineering at Princeton Uni
 versity. He obtained his undergraduate and Ph.D. in Mechanical Engineering
  from the University of Maryland in 2020. His research focuses on experime
 ntal studies of free-surfaces\, multiphase flows\, and surfactant dominate
 d flows. Additionally\, Martin is interested in developing experimental te
 chniques for fluid mechanics research. Martin was recognized as a Rising S
 tar in Mechanical Engineering in 2023.
LOCATION:Great Lakes Research Center (GLRC) Outside of 202 (social) and Roo
 m 202 (lecture)\, 1400 Townsend Drive\, Houghton\, MI\, 49931\, United Sta
 tes
URL:https://www.qmeet.net/EventDetails?EventID=52567
STATUS:CONFIRMED
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