BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Alice Thompson (University of Manchester) DTSTART:20240430T130000Z DTEND:20240430T135000Z DTSTAMP:20260423T021830Z UID:UEA_mth/7 DESCRIPTION:Title: Feedback control and continuation for deformable bubbles\nby Alice Tho mpson (University of Manchester) as part of Fluids and Structures Seminar @ UEA\n\n\nAbstract\nIn this talk\, I explore how feedback control and con trol-based continuation (CBC) can be used to both stabilize and detect uns table steady states in physical experiments. CBC aims to create experiment al equivalents of numerical methods such as tracking steady states and bif urcations which would otherwise not be possible in experiments. Here I de scribe our recent work on using CBC to explore bubble deformation in Hele- Shaw cells – the first such application of CBC in free-surface fluid mec hanics. For the case of a propagating bubble (a Saffman-Taylor bubble)\, w e use a numerical simulation of the system to develop a control strategy a nd act as a numerical experiment. We show how CBC protocols can be used to detect the unstable double-tipped propagating bubble state in nonlinear s imulations\, for both moving actuators and a more realistic setup involvin g an array of fixed-position actuators. Finally\, I will also discuss some of our recent laboratory experimental results for using CBC for non-propa gating bubbles placed in a straining flow\, where we have successfully tra cked both singly- and doubly-unstable steady branches connected via a limi t point associated with bubble breakup.\n LOCATION:https://researchseminars.org/talk/UEA_mth/7/ END:VEVENT END:VCALENDAR