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8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

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P9.44Tue 611:23-14:00Transient shear banding in complex fluidsRobyn Moorcroft 1 and Suzanne Fielding 11 Durham University, Department of Physics, Durham University, South Road, DH1 3LE,DURHAM, United KingdomWe give a brief introduction to the phenomenon of shear banding in complex fluids and reviewrecent experimental and theoretical literature regarding transient shear banding in shear startupand step shear strain. We then present recent work using a simple fluidity model for ageing softglasses to demonstrate age-dependent transient shear banding, showing the relation between thetransient banding and the stress overshoot in startup. Time permitting, we will also show ongoingwork for entangled polymer-like systems, demonstrating transient shear banding in shear startupand shear step strains. We explore the relation between the stress overshoot and transient shearbanding, for which a strong link is seen experimentally.44

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