pps proceeding - Abstract Preview
pps proceeding
Symposium: S15 - Morphology
Oral Presentation
 
 

Highly Viscous Polymeric Foam Flowing through an Orifice

Chen Ching-Hsien (1)*, Hallmark Bart (1), Davidson John Frank (1)

(1) University of Cambridge - Cambridge - UnitedKingdom

The rapid movement of gas-liquid foams through narrow contractions is commercially challenging and technically important, with wide industrial applications, including the flow and moulding of aerated products, e.g. ice cream and shaving foam, foam-sclerotherapy for varicose veins, and oil-well cementing when foam-cement slurries are pumped into narrow annuli. This study investigates the flow of wet foams with a polymeric liquid phase, which has a high viscosity and complex rheology, using a Multipass Rheometer. The in-situ visualization of foam flowing through an orifice, recorded by high-speed camera, reveals rich and complex behaviour and interaction between bubbles. The dynamics of the bubbles, quantitatively extracted from the bubble images by image analysis, is compared with the behaviour of bubbles in highly viscous Newtonian liquid.