Liquid‐liquid flow patterns in reduced dimension based on energy minimization approach

Kannan, Aadithya; Ray, Subhabrata; Das, Gargi

doi:10.1002/aic.15024

Cited by 6 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This corresponds to Eötvös number ( Eö ) ranging from 0.83 ≤ Eö ≤ 20.6 where, Eö

= \frac{Δ ρ g d^{2}}{σ}

and

Δ ρ

, g, d , and

σ

are the difference in phase densities, acceleration due to gravity, conduit diameter, and surface tension. The range of conduit dimension lies in the range of Eö (0.1 ≤ Eö ≤ 10) demarcating the macro and the micro domain as reported by Kannan et al The larger conduit diameter of 0.0125 m enables comparison of the present results with data from literature.…”

Section: Experimentationsupporting

confidence: 80%

Flow pattern transition in gas‐liquid downflow through narrow vertical tubes

et al. 2016

Self Cite

View full text Add to dashboard Cite

The present report studies on the flow pattern transitions during vertical air water downflow through millichannels (0.83 ≤ Eötvös no. ≤ 20.63). Four basic flow patterns namely falling film flow, slug flow, bubbly flow, and annular flow are observed in the range of experimental conditions studied and their range of existence has been noted to vary with tube diameter and phase velocities. Based on experimental observations, phenomenological models are proposed to predict the transition boundaries between adjacent patterns. These have been validated with experimental flow pattern maps from the present experiments. Thus the study formalizes procedure for developing a generalized flow pattern map for gas‐liquid downflow in narrow tubes. © 2016 American Institute of Chemical Engineers AIChE J, 63: 792–800, 2017

show abstract

“…This corresponds to Eötvös number ( Eö ) ranging from 0.83 ≤ Eö ≤ 20.6 where, Eö

= \frac{Δ ρ g d^{2}}{σ}

and

Δ ρ

, g, d , and

σ

Section: Experimentationsupporting

confidence: 80%

Flow pattern transition in gas‐liquid downflow through narrow vertical tubes

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this article, we discuss the phenomenon of draining from the open end of conduits when their top closure is pierced by small amounts, a geometry hitherto unexplored, and compare the behavior with emptying of closed top and open top tubes. We confine our studies to the meso-scale 5 where gravity and surface forces compete to govern the hydrodynamics of flow. Experiments performed over a wide range of conduit diameter, inclination and liquid surface tension reveals several unique features of the draining process.…”

Section: Introductionmentioning

confidence: 99%

Draining phenomenon in closed narrow tubes pierced at the top: an experimental and theoretical analysis

Kumar

Ray

Das

2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

The phenomenon of draining, although ubiquitous in nature, has received scant attention especially in the meso-scale. We observe that closed top tubes drain by the inception of an axisymmetric 'Taylor finger' while a minute pierce of the top closure results in an altogether different physics with air entry from the top pushing the liquid out. Again, a coupled mechanism comprising full bore followed by film draining is observed for "too small" a top pierce at "high enough" Eotvos number. Top pierce initiates draining in dimensions which would not drain otherwise and finger entry hastens the process of draining. The myriad of phenomena thus exhibited is depicted as phase diagrams in vertical and inclined conduits. A mechanistic model has been proposed to predict draining and the onset of finger entry in vertical tubes.

show abstract