Drag reduction assisted emulsification in a cross-slot microchannel - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Drag reduction assisted emulsification in a cross-slot microchannel

Résumé

An experimental study of the turbulent dynamics of emulsification in a cross-slot microfluidic device is presented. The continuous phase contains a minute amount of an inelastic polymer (xanthan) and the involved Reynolds numbers are large. the emulsification Drag reduction phenomenon is observed. The statistics of droplet sizes in the resulting emulsions are measured ex-situ by means of digital microscopy in a wide range of Reynolds numbers and polymer concentrations in the continuous phase. Integral measurements of the statistics of the pressure drops in the micro-channel allow one to map the drag reduction states. Corresponding to each state, the space-time dynamics of the emulsification process are assessed by means of in-situ high speed imaging of the interface between the two fluids which further allows one to extract the characteristic time and space scales associated to the dynamics of the interface. Various dynamic regimes of the microscopic emulsification process are mapped in terms of the Reynolds number and shear thinning rheology of the continuous phase.
Fichier non déposé

Dates et versions

hal-03690729 , version 1 (08-06-2022)

Identifiants

  • HAL Id : hal-03690729 , version 1

Citer

Elia Missi, Jérôme Bellettre, Agnès Montillet, Teodor Burghelea. Drag reduction assisted emulsification in a cross-slot microchannel. AERC2022 - The Annual European Rheology Conference, Apr 2022, Seville, Spain. ⟨hal-03690729⟩
16 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More