SMRI Seminar: ’Unexpected Behaviour in Dilute Granular Materials’ Jonathan James Wylie (City University of Hong Kong) Thursday 27th April, 1:00-2:00pm (AEST) Quad S249 & Online (register/join - https://uni-sydney.zoom.us/j/86254142328) Abstract: The phrase ’granular material’ is used to describe a large number of discrete solid, macroscopic particles that lose energy whenever the particles collide. One might naively imagine that such systems would exhibit similar behaviour to traditional fluid and solid mechanics. However, we present two problems that superficially appear to be extremely simple but yield surprisingly rich dynamics that have no analogue in traditional mechanics. Firstly, we consider a dilute stream of particles that collides with an oblique planar wall. Secondly, we show several surprising phenomena that occur in an extremely simple system of a single frictionless, inelastic, spherical particle falling under gravity through a symmetric funnel. Bio: Jonathan Wylie obtained his PhD and was subsequently awarded a Junior Research Fellowship from King’s College, Cambridge. He then held research fellow positions in Woods Hole Oceanographic Institution and the University of Toronto before joining the City University of Hong Kong. His research interests include fluid mechanics, granular materials, ion transport and the mathematical modelling of geophysical systems. ---- Please join us after the seminar for SMRI afternoon tea, 2:00-2:45pm every Thursday on the SMRI Terrace (accessed through A14-04-L4.36) ---- Other upcoming SMRI events can be found here: https://mathematical-research-institute.sydney.edu.au/news-events/ SMRI YouTube Channel: https://www.youtube.com/c/SydneyMathematicalResearchInstituteSMRI