Boundaries among bubbly and slug flow regimes in air–water two-phase flows in vertical pipe of poor wettability

Iguchi, Manabu; Terauchi, Yukio

doi:10.1016/s0301-9322(00)00042-2

Cited by 23 publications

(4 citation statements)

References 5 publications

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“…Indeed, Iguchi & Terauchi [21] showed that the pattern of the bubbly and slug flows changed in a vertical pipe coated with a waterrepellent material, Furthermore, the effect of the wettability affects the slug movement in an inclined pipe [22].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Gas-Liquid Two-Phase Flow in a Horizontally Placed Hydrophobic Rectangular Channel (Part 1, Influence of Abrupt Expansion)

Ueda¹,

Nakajima

Ishii³

et al. 2012

High Temperature Materials and Processes

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This paper aims to computationally investigate flow patterns of gasliquid twophase with an abrupt expansion. To do so, the present computation is nicely verified against the previous experimental results for a good wettability surface. These rectangular channels have a thickness narrower than the Laplace constant of the present situation. Under a poor wettability condition, this narrow thickness affects the flow pattern; e.g., the air phase forms channeling behind the expansion in a low airflow rate whereas the air phase becomes fragments of bubbles due to the expansion under a good wettability condition.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Gas-Liquid Two-Phase Flow in a Horizontally Placed Hydrophobic Rectangular Channel (Part 1, Influence of Abrupt Expansion)

Ueda¹,

Nakajima

Ishii³

et al. 2012

High Temperature Materials and Processes

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“…As a first step, k 2 is given by Eq. (22) and k 3 is assumed to be unity. The results are shown in Fig.…”

Section: Prediction Of Critical Condition For Gas Separation Efficimentioning

confidence: 99%

Separation of Gas from Downward Gas-Liquid Two-Phase Flow Using a Y-Junction of Poor Wettability

Ishiguro

Iguchi

Mizuno

et al. 2004

JSME international journal. Ser. B, Fluids and thermal engineer

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A Y-junction made of transparent acrylic resin was placed vertically downward. One side of the Y-junction was coated with repellent to change its wettability. As a result, the wettability of that side became poor, while the wettability of the other side was originally good. Straight pipes were connected to the main pipe and two branches of the Y-junction. A downward air-water two-phase flow was introduced into the main pipe. The air attached preferably to the poorly wetted side of the main pipe and entered into the poorly wetted branch. When the superficial velocities of air and water, j g and j w , were less than their respective critical values, air was completely distributed into the poorly wetted branch, and thus, the gas separation efficiency was 100%. An empirical equation was proposed for predicting the critical values of j g and j w .

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“…[10][11][12] The flow pattern means a spatial as well as a temporal structure of water-air two-phase flow. The flow pattern was strongly dependent on the wettability of the pipe wall.…”

Section: Introductionmentioning

confidence: 99%

Model Experiment on the Behavior of Argon Gas in Immersion Nozzle

Ishiguro

Iguchi

2003

ISIJ International

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Boundaries among bubbly and slug flow regimes in air–water two-phase flows in vertical pipe of poor wettability

Cited by 23 publications

References 5 publications

Numerical Simulation of Gas-Liquid Two-Phase Flow in a Horizontally Placed Hydrophobic Rectangular Channel (Part 1, Influence of Abrupt Expansion)

Numerical Simulation of Gas-Liquid Two-Phase Flow in a Horizontally Placed Hydrophobic Rectangular Channel (Part 1, Influence of Abrupt Expansion)

Separation of Gas from Downward Gas-Liquid Two-Phase Flow Using a Y-Junction of Poor Wettability

Model Experiment on the Behavior of Argon Gas in Immersion Nozzle

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