1. Effect of Elevated Pressure on the Rheology, Vitrification, and Aging of Nearly Hard Colloidal Spheres
J. J. Magda & M. Alcoutlabi, Department of Chemical Engineering, University of Utah
Application of ultrahigh pressures (> 500 bar) under isothermal conditions can dramatically increase the viscosity of suspensions, possibly even vitrifying liquid suspensions into solid glasses. This may occur because the compression of the suspension induces “jamming” of the particles into irreversible clusters. The knowledge obtained from rheological experiments that probe this phenomenon may help us understand the flow of oil in deep undersea pipelines. w
P=1 atm
P=1000 atm w
Viscosity h
Pressure