Mass transfer characteristics and concentration field evolution for gas-liquid Taylor flow in milli channels - Archive ouverte HAL Access content directly
Journal Articles Chemical Engineering Science Year : 2019

Mass transfer characteristics and concentration field evolution for gas-liquid Taylor flow in milli channels

Abstract

The results of the recent experimental work performed by Butler et al. (2016, 2018) are analysed based on the dominant phenomena: (i) small scale convection by means of Taylor vortices in the liquid slugs and (ii) diffusion in lubrication film. A main result shown here is that the Taylor circulation frequency is able to reflect the global mass transfer rate in gas-liquid Taylor flow through an almost linear relationship, which emphasizes the interest of the circulating motion in the slug, and gives a very simple correlation to predict the kLa value (at large Schmidt number). A mechanism of flow behavior during the bubble formation at the T-mixer is proposed as a possible explanation of unexpected concentration areas (called “islands”). However, despite of these unusual concentration field structures in these cases, the mass transfer rate coefficient kLa is still accurately predicted by the Taylor circulation frequency in the slug.
Fichier principal
Vignette du fichier
Abiev_24193.pdf (1.1 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02270667 , version 1 (26-08-2019)

Identifiers

Cite

R.Sh. Abiev, Colin Butler, Emmanuel Cid, Benjamin Lalanne, Anne-Marie Billet. Mass transfer characteristics and concentration field evolution for gas-liquid Taylor flow in milli channels. Chemical Engineering Science, 2019, 207, pp.1331-1340. ⟨10.1016/j.ces.2019.07.046⟩. ⟨hal-02270667⟩
35 View
144 Download

Altmetric

Share

Gmail Facebook X LinkedIn More