School of Mathematical Sciences

Wrinkles and creases in thin layers of viscoplastic fluid

Date(s)
Thursday 1st May 2025 (14:00-15:00)
Contact
Event Convenor Contact: Matteo.Icardi@nottingham.ac.uk
Description
Speaker's Name: Thomasina Ball
Speaker's Affiliation: University of Warwick
Speaker's Research Theme(s): Fluid mechanics,Applied Mathematics
Abstract:
Wrinkles or creases in the surface of a material are indicative of compression. For example, on Earth, mountain ranges formed due to the plate tectonics exhibit regular spaced folds on the surface; and wrinkles are regularly observed on the surface of spreading lava flows. Both examples have a layered structure with contrasting rheological behaviours where compression causes the stiff surface to buckle. Modelling these types of systems often relies on the layer being purely elastic. However, sometimes the material is such that it is forced to deform beyond its yield point, suggesting a substantially more viscous or plastic material would be more relevant. In the talk I will look at two problems where rheological contrasts due to layers or depth dependent viscosities lead to surfaces wrinkles or creases. The first problem focuses on scraping of a viscoplastic fluid layer as a model for mountain building. The second looks at the compression of a lubricated viscoplastic beam.

Venue: Physics A1
Online Conference Link: https://teams.microsoft.com/l/meetup-join/19%3ae223ba005ea847f59c9a59d5cf4b0e54%40thread.tacv2/1745588130145?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%222f74913b-220b-4cfc-a1ac-97df3c090fb3%22%7d

School of Mathematical Sciences

The University of Nottingham
University Park
Nottingham, NG7 2RD

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