Yield-stress fluids foams: flow patterns and controlled production in T-junction and flow-focusing devices - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Soft Matter Année : 2016

Yield-stress fluids foams: flow patterns and controlled production in T-junction and flow-focusing devices

(1) , (2) , (3) , (2)
1
2
3
Benoit Laborie
Florence Rouyer
Elise Lorenceau

Résumé

We study the formation of yield-stress fluid foams in millifluidic flow-focusing and T-junction devices. First, we provide a phase diagram for the unsteady operating regimes of bubble production when the gas pressure and the yield-stress fluid flow rate are imposed. Three regimes are identified: a co-flow of gas and yield-stress fluid, a transient production of bubble and a flow of yield-stress fluid only. Taking wall slip into account, we provide a model for the pressure at the onset of bubble formation. Then, we detail and compare two simple methods to ensure steady bubble production: regulation of the gas pressure or flow-rate. These techniques, which are easy to implement, thus open pathways for controlled production of dry yield-stress fluid foams as shown at the end of this article.
Fichier non déposé

Dates et versions

hal-01691667 , version 1 (24-01-2018)

Identifiants

Citer

Benoit Laborie, Florence Rouyer, Dan Angelescu, Elise Lorenceau. Yield-stress fluids foams: flow patterns and controlled production in T-junction and flow-focusing devices. Soft Matter, 2016, 12 (46), pp.9355 - 9363. ⟨10.1039/c6sm02054b⟩. ⟨hal-01691667⟩
131 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More