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Spring 2025
Seminars take place online on Tuesdays at 3.00pm on Zoom via the link https://ucl.zoom.us/j/99614222402. Many of the seminars will be 'hybrid' (i.e. in person +zoom). If you require any more information on the Applied seminars please contact Prof Jean-Marc Vanden-Broeck (e-mail: j.vanden-broeck AT ucl.ac.uk or tel: 020-7679-2835) or Prof Ilia Kamotski (e-mail: i.kamotski AT ucl.ac.uk or tel: 020-7679-3937).
Tuesday 14 January 2025 in Room G06, 21 Gordon Square
Speaker: Giulia Salussolia (Universidad Mayor, Chile)
Title: elastic or bent sheets in viscous flow
Abstract:
Understanding the dynamics of micro and nanometric plate-like particles in viscous flow is essential for several applications such as 2D nanomaterials fabrication, water contaminants control and biological modelling of microswimmers. This talk presents an approach to modelling plate-like particles - both flexible and rigid - in viscous flows. The approach involves designing a 2D slender body theory for plates and elastic sheets that simplifies the treatment of the fluid-structure interactions and accurately describes the flow and rheology of both passive and active plates/sheets. Derived from the boundary integral formulation of the incompressible Stokes equations, this theory reduces the surface integral over the particle boundary to a non-local line integral across the particle’s central line, excluding the edge effects and significantly reducing the computational cost. The 2D slender body theory for plates is then used to qualitatively explore the dynamics of deformable plate-like particles in shear flow, where the interplay between hydrodynamic stress and bending stiffness, along with initial configurations, governs their behaviour.