As the quality increases,the bubble stouch each other to form
polyhedral structures with thin separating lamella.Within this
quality regime,the rheology behavior is controlled by the foam
structure andlamellaproperties. Princen and Kiss(1989) have
proposed an empirical model to correlate the volume fraction,
continuous phase viscosity,sauter mean diameter (SMD)and interfacial tension to the emulsion rheology,i.e.,