![]() The foam behaviour is analysed over an induced cycle of ascendant and descendant deformation at the wall, well controlled by varying the gas pressure for a constant liquid pressure. ![]() The foam hysteretic behaviour was evaluated by introducing the analogous of a standard three-step test in which the recovery of viscosity is commonly studied over three deformation stages. The technique developed here allows for a qualitative evaluation of the property of foam recovery after a deformation in a flow-focusing microfluidic device. A feature of foam stability is represented by the foam’s ability to resist to the deformation and to recover its initial properties after deformation. ![]() However, in everyday life, foams are submitted to numerous deformations. Foam stability often refers to the foam left to evolve with time in static conditions.
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