BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Maria-Carme Calderer (University of Minnesota) DTSTART:20200429T150000Z DTEND:20200429T160000Z DTSTAMP:20260423T024023Z UID:GSMMA/1 DESCRIPTION:Title: 3- Dimensional Solitons in Nematic Liquid Crystals subject to AC Fields\n by Maria-Carme Calderer (University of Minnesota) as part of Global Semina r on Mathematical Modeling and Applications\n\n\nAbstract\nI will start wi th a survey of liquid crystal models and related mathematics\, and subsequ ently focus on recent work on dynamics of structures that result from the coupling of electrokinetic\, elastic and viscous effects. From point of vi ew of applications the work falls into research of the role of liquid crys tal based nanotransport devices. We show that spatially localized three-di mensional solitary waves of molecular reorientation can form under the app lication of an AC field: self-trapped bullets of oscillating molecular dir ector\, that move at very high speed perpendicularly to the electric field and to the initial alignment direction. The bullets or tuxedos are true s olitons that preserve spatially confined shapes and survive collisions.\n\ nWe analyze a model that combines equations of liquid crystal dynamics cou pled with Poisson-Nearst-Planck equations of electrokinetics. Flexoelectri city is the main driving mechanism. \n\nWork (joint with Ashley Earls) bas ed on laboratory experiments by Lavrentovich et al.\n\nZoom Meeting ended\ n LOCATION:https://researchseminars.org/talk/GSMMA/1/ END:VEVENT END:VCALENDAR