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James Baker -- Seeing inside moving material: Dynamic x-ray imaging of granular flows

Patterned pufferfish scales demonstrating a Turing pattern in the natural world
Dates:10 May 2023
Times:13:00 - 14:00
What is it:Seminar
Organiser:Department of Mathematics
Who is it for:University staff, External researchers, Current University students
Speaker:James Baker
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  • Mathematics in the life sciences
  • Department of Mathematics

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  • In category "Seminar"
  • In group "(Maths) Mathematics in the life sciences "
  • In group "(Maths) Maths seminar series"
  • By Department of Mathematics

Join us for this seminar by James Baker (Liverpool John Moores University) as part of the North West Seminar Series in Mathematical Biology and Data Sciences. Details of the full series can be found here https://www.cms.livjm.ac.uk/APMSeminar/

The talk will be hosted by LJMU and streamed via Teams please contact carl.whitfield@manchester.ac.uk or i.siekmann@ljmu.ac.uk for the link, or sign up to the mailing list.

Abstract: Granular materials are everywhere - think of sand, soil and snow as everyday examples. These collections of individual particles can act like solids – we can walk or even build houses on top without any serious deformation. However, they sometimes behave like liquids, and when granular materials start to flow it can be catastrophic, with avalanches and landslides being examples of natural granular flows. In industry, granular flows are also commonplace during the crushing of mineral ores, the mixing of pharmaceutical powders, or the separation and transport of food grains, to name a few. It is therefore crucial to build reliable models to help us mitigate natural hazards, as well as optimise industrial processes.

Experimentally validating such models can be difficult because most granular materials are opaque – you can only see what is going on at the boundaries, which is not necessarily representative of the whole flow. X-ray technologies provide an unobtrusive means to delve deeper, but established methods are not well-suited to moving material. In this talk I will present a suite of dynamic x-ray imaging techniques designed specifically for flowing media, Through a series of small-scale examples, I will show how image analysis can be used to measure various material properties, and some implications for flow modelling. Beyond dry granular flows, these developments could also be applied to more general soft-matter systems such as biological foams, gels and suspensions.

To 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.manchester.ac.uk

Speaker

James Baker

Role: Senior Lecturer

Organisation: LJMU

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Carl Whitfield

carl.whitfield@manchester.ac.uk

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