The dissipative rheology of bubble monolayers
Abstract
We confine a monodisperse bubble monolayer between the two parallel plates of a rheometer. One plate is fixed and the other undergoes an oscillatory tangential motion, so that the bubbles are sheared. We measure the shear stress as a function of the imposed strain amplitude and frequency. The interfacial shear and dilational moduli of the foaming solutions are studied in independent experiments. Like a 3D foam, the bubble monolayer consists of soap films connected via Plateau borders, but its structure is much simpler, enabling us to study and model the quantitative link between interfacial