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Geometry instability and activity in complex and biological fluids

Within the research area of soft condensed matter physics, this proposal concerns the remarkable flow (rheological) behaviour of complex fluids such as polymers, colloids and emulsions; and of biologically active suspensions such... ver más

31/12/2016

UNIVERSITY OF DURH...

1M€

Presupuesto del proyecto: 1M€

Líder del proyecto

UNIVERSITY OF DURHAM No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2016-12-31 No tenemos la información de la convocatoria

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1 Participantes

UNIVERSITY OF DURHAM

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Líder del proyecto

UNIVERSITY OF DURHAM No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Within the research area of soft condensed matter physics, this proposal concerns the remarkable flow (rheological) behaviour of complex fluids such as polymers, colloids and emulsions; and of biologically active suspensions such as swarms of bacteria or sperm, and the cytoskeletal matrix of the biological cell. A unifying concept in two closely related research themes is the way non-equilibrium dynamics underlies the rheological behaviour of these fluids. Theme I concerns non-equilibrium phase transitions induced by an externally applied flow. It addresses the challenge of predicting the onset, characteristics and implications of these transitions in the complicated flow geometries that arise experimentally and industrially: focusing on the two key issues that will form the basis of practical rheological prediction, by addressing the key concepts of underlying physics. The first concerns the way in which geometrical confinement can lead to a rich interplay between three dimensional (3D) phase transitions in the fluid bulk, and 2D surface transitions at the hard walls of the flow device. The second concerns instabilities in extensional (stretching) flows and how they interact with transitions in shearing flows, aiming to develop a unified understanding of both, and how they interact. Theme II turns to biological suspensions that exist in strongly non-equilibrium regimes due internal activity such as bacterial swimming. While much progress has been made predicting rules for single-swimmer propulsion, and emergent phenomena of many swimmers collectively, most work to date has been in a simple (Newtonian) suspending fluid. This is a major shortcoming: most biological swimming occurs in complex polymeric fluids. My aim is to forge a physical understanding of biological activity in these complex fluid environments. Emergent phenomena include banded and turbulent flows, with an obvious link to Theme I, and an overall aim is to cross fertilise concepts between the Themes.

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