Wettability Effect on the Flow Pattern of Air-water Two-phase Flows in a Vertical Circular Pipe

Terauchi, Yukio; Iguchi, Manabu; Kosaka, Hiroaki; Yokoya, Shinichiro; Hara, Shigeta

doi:10.2355/tetsutohagane1955.85.9_645

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…Such attachment phenomena were also observed in airwater two-phase flows ascending in a circular pipe. 10) Even in the annular flow regime, some parts of the wall were covered with air, although their positions shifted downward with respect to time. Figure 7 compares a photograph of bubbly flow in an acrylic pipe with that in a paraffin-coated pipe.…”

Section: Pipe Of Poor Wettability (Paraffin-coated Pipementioning

confidence: 99%

“…However, it is not considered in Eq. (10). Model experiments using molten metals are needed to check whether the effect of the density of molten metal on the flow pattern is actually negligible or not.…”

Section: (4) Effect Of the Density Of Liquidmentioning

confidence: 99%

“…[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%

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Model Experiment on the Behavior of Argon Gas in Immersion Nozzle

Ishiguro

Iguchi

2003

ISIJ International

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Section: Pipe Of Poor Wettability (Paraffin-coated Pipementioning

confidence: 99%

Section: (4) Effect Of the Density Of Liquidmentioning

confidence: 99%

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Model Experiment on the Behavior of Argon Gas in Immersion Nozzle

Ishiguro

Iguchi

2003

ISIJ International

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“…This method relies on the fact that gas is likely to attach to a poorly wetted solid body (19) - (23) . The wettability is quantitatively evaluated in terms of the contact angle, θ, as shown in Fig.…”

Section: Introductionmentioning

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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Introduction

Iguchi¹,

Ilegbusi²

2010

Modeling Multiphase Materials Processes

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Wettability Effect on the Flow Pattern of Air-water Two-phase Flows in a Vertical Circular Pipe

Cited by 15 publications

References 4 publications

Model Experiment on the Behavior of Argon Gas in Immersion Nozzle

Model Experiment on the Behavior of Argon Gas in Immersion Nozzle

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

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