Dependance of Viscosity and Foam Consistency on Gas Volume Fraction
Application Note Apr 28, 2015
Malvern Instruments Limited
Foams can exhibit properties of an elastic solid and hence yield stress behaviour at low shear stresses and liquid like behavior above the yield stress. This behaviour can be described using a Herschel-Bulkley model with key fitting parameters being the yield stress and consistency which are dependent on gas volume fraction.