Wednesday 07 Feb 2018: Blowing in the wind: the mathematics of dispersion (Inspiring Science Lecture, David Rees Distinguished Fellow)
Prof. Jacques Vanneste - University of Edinburgh
The dangers of environmental pollution, particularly through the accidental release of toxic chemicals in the atmosphere or the ocean, highlight the importance of dispersion in fluid flows. Fundamentally, dispersion results from the interplay between large-scale transport by the flow, and small-scale mixing by turbulent or molecular motion. This lecture will discuss simple mathematical models of dispersion that shed light on the subtle nature of this interplay. It will specifically address the problem of urban dispersion, and the geometric constraints this introduces, by examining an idealised model of pollution release in a grid-plan city such as Manhattan.