The breakup dynamics and mechanism of viscous droplets in Y-shaped microchannels - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemical Engineering Science Année : 2021

The breakup dynamics and mechanism of viscous droplets in Y-shaped microchannels

Daofan Ma
  • Fonction : Auteur
Di Liang
  • Fonction : Auteur
Chunying Zhu
Taotao Fu
Youguang Ma
  • Fonction : Auteur
Xigang Yuan
  • Fonction : Auteur
Huai-Zhi Li

Résumé

The breakup process of viscous droplets in Y-shaped microchannel was visually investigated. The dynamics of droplet breakup with partial obstruction was primarily studied due to its wide operating range and applicability. The rupture process of droplet could be divided into squeezing, transition and rapid pinch-off stages. In the squeezing stage, the minimum neck width displays a power-law relation with time, and the power-law index α decreases with increasing two-phase viscosity ratio λ. The effect of the capillary number of continuous phase Cac and the length of the mother droplet l0 on α is nearly negligible. In the transition stage, the minimum neck width varies linearly with time, and the slope increases with decreasing λ, increasing Cac and l0. In the rapid pinch-off stage, the minimum neck width declines exponentially with time, and the power-law index β decreases with increasing λ and decreasing l0, however, it is almost independent of Cac

Dates et versions

hal-03199287 , version 1 (15-04-2021)

Identifiants

Citer

Daofan Ma, Di Liang, Chunying Zhu, Taotao Fu, Youguang Ma, et al.. The breakup dynamics and mechanism of viscous droplets in Y-shaped microchannels. Chemical Engineering Science, 2021, 231, pp.116300. ⟨10.1016/j.ces.2020.116300⟩. ⟨hal-03199287⟩
24 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More