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Details of Grant 

EPSRC Reference: GR/L49048/01
Title: EXPERIMENTAL AND DISCRETE PARTICLE SIMULATION STUDIES OF PARTICLE GEL FORMATION AND BREAKDOWN UNDER SHEAR
Principal Investigator: Heyes, Professor DM
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: Chemistry
Organisation: University of Surrey
Scheme: Standard Research (Pre-FEC)
Starts: 01 June 1998 Ends: 31 May 2001 Value (£): 39,551
EPSRC Research Topic Classifications:
Complex fluids & soft solids Materials Processing
EPSRC Industrial Sector Classifications:
Chemicals
Related Grants:
Panel History:  
Summary on Grant Application Form
In this study we propose to investigate model particle gels under gelling and shear breakdown conditions using two complementary techniques - Virtual Gap Rheometry (VGR) and Discrete Particle Computer Simulation. These two techniques can probe sufficiently high frequencies (or equivalently, short enough time-scales) that are characteristic of the individual building units of the gel-forming system so that the mechanics of gel formation and breakdown can be related to the interaction laws between the particles. The VGR will be used to monitor the low strain and high frequency evolution of model particle gelling systems under growth and shear breakdown conditions. The gelling/breakdown processes will be characterised using frequency and strain rate dependent dynamic moduli as a function of time during these processes. The simulations can model the same systems (eg aqueous based charged lattices) as the VGR giving the dynamical moduli as a function of time and shear rate. The simulation technique will furnish structural information to help elucidate the simulated and measured dynamic rheology, allowing process control and texture determination in real products to be placed on a firmer scientific basis.
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Organisation Website: http://www.surrey.ac.uk