BEGIN:VCALENDAR
PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20240507T121358Z
DTSTART:20240508T120000Z
DTEND:20240508T130000Z
SUMMARY:Nikhil Desai -- Self-propulsion of Marangoni-stress-driven active
  drops along a wall [ONLINE]
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}s2yu-ltfmmx
 i5-6slwct
DESCRIPTION:Join us for this seminar by Nikhil Desai (Cambridge) as part 
 of the North West Seminar Series in Mathematical Biology and Data Scienc
 es\n\nThe talk will be hosted by the University of Liverpool and availab
 le to watch via zoom. Please contact carl.whitfield@manchester.ac.uk or 
 mdomijan@liverpool.ac.uk for the link\, or sign up to the mailing list.\
 n\nTitle: Self-propulsion of Marangoni-stress-driven active drops along 
 a wall\nAbstract: Active drops are synthetic\, micron-sized ''swimmers''
  that convert chemical energy into mechanical motion. These drops are ph
 ysico-chemically isotropic and emit/absorb chemical solutes whose concen
 tration gradients cause interfacial flows and stresses\, which drive the
  solute's own transport via advection. This nonlinear coupling between f
 luid flow and solute transport around the drop causes a spontaneous symm
 etry-breaking\, leading to self-propulsion of the drop\, if the ratio of
  convective-to-diffusive solute transport\, or Peclet number\, is large 
 enough. As a result of their net buoyancy\, active drops generally evolv
 e at small finite distances from boundaries. Yet\, many theoretical stud
 ies on drop propulsion focus on unbounded domains\, where problems are m
 ore tractable due to a simpler geometry. Using numerical simulations\, w
 e address this gap in understanding and provide physical insights on the
  spontaneous propulsion of active drops along a rigid wall. We first mod
 el the drop as a rigid sphere that emits a solute isotropically\, and de
 velops a surface 'slip velocity' in response to concentration gradients 
 of this solute. We show that\, and explain why\, a reduction in the drop
 -to-wall separation actually promotes the self-propulsion of this model 
 drop. We also consider viscous drops that swim due to surface flows (dif
 fusiophoretic effects) as well as surface stresses (Marangoni effects)\,
  and show how the relative strengths of these two effects influences the
  drop's motion near a rigid wall.\n  \nTo subscribe to the mailing list 
 for this event series\, please send an e-mail with the phrase “subscribe
  math-lifesci-seminar” in the message body to listserv@listserv.manchest
 er.ac.uk
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Online
END:VEVENT
END:VCALENDAR