Antonio M Puertas et al 2005 J. Phys.: Condens. Matter 17 L271 doi:10.1088/0953-8984/17/25/L05
Antonio M Puertas1, Emanuela Zaccarelli2 and Francesco Sciortino2
Show affiliationsWe report a numerical study of the shear viscosity and the frequency dependent elastic moduli close to dynamical arrest for a model of short range attractive colloids, both for the repulsive and the attractive glass transition. Calculating the stress autocorrelation functions, we find that density fluctuations of wavevectors close to the first peak in the structure factor control the viscosity rise on approaching the repulsive glass, while fluctuations of larger wavevectors control the viscosity close to the attractive glass. On approaching the glass transition, the viscosity diverges with a power law with the same exponent as the density autocorrelation time.
66.20.-d Viscosity of liquids; diffusive momentum transport
62.40.+i Anelasticity, internal friction, stress relaxation, and mechanical resonances
64.70.P- Glass transitions of specific systems
Soft matter, liquids and polymers
Issue 25 (29 June 2005)
Received 15 March 2005, in final form 15 May 2005
Published 10 June 2005
Antonio M Puertas et al 2005 J. Phys.: Condens. Matter 17 L271
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