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UID:0-5675@eng.ufl.edu
DTSTART;TZID=America/New_York:20230406T124500
DTEND;TZID=America/New_York:20230406T140000
DTSTAMP:20251201T210320Z
URL:https://www.eng.ufl.edu/news-events/events/mae-affiliate-seminar-funda
 mentals-and-applications-of-diffusiophoresis-particle-motion-induced-by-so
 lute-c/
SUMMARY:MAE Affiliate Seminar - Fundamentals and Applications of Diffusioph
 oresis: Particle Motion Induced by Solute C
DESCRIPTION:Fundamentals and Applications of Diffusiophoresis: Particle Mot
 ion Induced by Solute Concentration Gradients\nThursday\, April 6\, 2023\,
  at 12:50 pm\nLocation: In-Person MAE-A\, Room 303\nHenry C.W. Chu\, PhD\n
 Assistant Professor\, Department of Chemical Engineering\, University of F
 lorida\nAbstract\nDiffusiophoresis refers to the deterministic motion of p
 articles induced by a surrounding concentration gradient of solute. Diffus
 iophoresis has received much attention in recent years for its ability to 
 manipulate colloid transport in a wide range of applications\, including m
 ixing and separation of colloids\, enhanced oil recovery\, drug delivery\,
  to water and surface cleaning. In this talk\, I present three projects in
  my group concerning the fundamentals and applications of diffusiophoresis
 . In the first project\, the motivation is an ongoing challenge of predict
 ing the transport of diffusiophoretic colloids in hydrodynamic flows. I pr
 esent our Taylor-dispersion-like macro transport framework for predicting 
 the transport of a diffusiophoretic colloidal species under a steady press
 ure-driven flow and transient solute gradient. In addition to its accuracy
 \, our macro transport equation requires O(103) times less computational r
 untime than the direct numerical solution of the original\, two/three-dime
 nsional advection-diffusion equations. In the second project\, we examine 
 the unidirectional drying of a colloidal suspension for manufacturing coll
 oidal films\, where the role of diffusiophoresis is unexplored to date whe
 n coupled with gravity. I present our direct numerical simulations of the 
 advective-diffusive transport of an electrolyte-colloid suspension in a un
 idirectional drying cell under gravity and diffusiophoresis. Our results s
 how new scalings for the growth of the colloidal layer\, where the layer p
 roduced with diffusiophoretic colloids could be an order of magnitude thic
 ker than with non-diffusiophoretic colloids. In the third project\, recent
  experiments demonstrated diffusiophoresis in porous media\, but existing 
 theories cannot predict colloid motion. We open a new area of research by 
 developing a foundational mathematical model that can predict colloid diff
 usiophoresis in porous media. A comparison between our model predictions a
 nd experiments demonstrates excellent agreement. Our model will motivate f
 uture work and could be used to benchmark future experiments.\nBiography\n
 Dr. Henry Chu is an Assistant Professor in the Department of Chemical Engi
 neering at the University of Florida (UF). He obtained an M.Phil. in Mecha
 nical Engineering from The University of Hong Kong (HKU) in 2012 under the
  supervision of Professors Chiu-On Ng and Kwok-Wing Chow. He earned a Ph.D
 . in Mechanical Engineering from Cornell University in 2017 under the supe
 rvision of Professor Roseanna Zia. Following his Ph.D.\, he was a Postdoct
 oral Fellow in Chemical Engineering at Carnegie Mellon University\, workin
 g with Professors Aditya Khair\, Robert Tilton\, and Stephen Garoff. In 20
 21\, he joined UF. The theme of his research is heterogeneous soft matter 
 transport and design\, covering topics such as complex fluid dynamics\, co
 lloid\, and interface science\, electrokinetics\, and rheology. His resear
 ch develops predictive multi-scale computational tools and fundamental the
 ory to address emerging National Academy of Engineering Grand Challenges f
 or Engineering in these research areas\, emphasizing close collaboration w
 ith experimental groups to translate knowledge into applications. His work
  has been recognized through several awards\, including the Clyde W. Mason
  Scholarship (Cornell)\, Research Travel Grant Award (Cornell)\, Student M
 ember Travel Award (American Institute of Physics)\, Global Faculty Fellow
 ship (UF)\, and Soft Matter Emerging Investigator (The Royal Society of Ch
 emistry). Dr. Chu welcomes collaboration with academia\, government agenci
 es\, and industry sponsors.\nMAE Faculty Host: TBD
CATEGORIES:Seminars
LOCATION:MAE-A Room 303\, 939 Sweetwater Drive\, Gainesville\, FL\, 32611\,
  United States
GEO:29.643814;-82.34865
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=939 Sweetwater Drive\, Gain
 esville\, FL\, 32611\, United States;X-APPLE-RADIUS=100;X-TITLE=MAE-A Room
  303:geo:29.643814,-82.34865
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