There exist a large number of industrial applications which involve the extrusion of aerated composite materials through an orifice, such as styrofoam, insulation and confectionery. Often such delicate structures change due to shear and pressure fields experienced on extrusion. The Study Group was asked to investigate the influence of these shear and pressure fields on the structure of aerated composite materials, particularly the degree of aeration retained.

Problem presented by
Caroline Bird (Unilever Research)

Study Group contributors
David Allwright (Smith Institute)
Chris Breward (University of Oxford)
John Byatt-Smith (University of Edinburgh)
Paul Dellar (University of Oxford)
Carina Edwards (University of Oxford)
Darren Fidler (Heriot-Watt University)
Marianne Grammatika (University of Sheffield)
Andrew Grief (University of Oxford)
John Hinch (University of Cambridge)
Katerina Kaouri (University of Oxford)
Arjen Koop (University of Oxford)
Gregory Kozyreff (University of Oxford)
Andrew Lacey (Heriot-Watt University)
John Ockendon (University of Oxford)
Colin Please (University of Southampton)
Giles Richardson (University of Nottingham)
Caroline Voong (Heriot-Watt University)
Stephen Wilson (University of Strathclyde)