Effect of wetting conditions and flow rate on bubble formation at orifices submerged in water

G. Corchero; A. Medina; F. J. Higuera

doi:10.1016/j.colsurfa.2006.04.046

Effect of wetting conditions and flow rate on bubble formation at orifices submerged in water

G. Corchero, A. Medina, F. J. Higuera

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

An experimental investigation has been carried out on the generation of bubbles due to the injection of a constant flow rate of air through an orifice submerged in water. Orifices of different radii drilled in horizontal plates of different materials, both hydrophilic and hydrophobic, have been used to cover a range of static contact angles (68° ≤ θ₀ ≤ 123°), and a wide range of volumetric gas flow rates (0.5 mm³/s ≤ Q ≤ 1.33 × 10⁴ mm³/s) has been investigated. It is shown that data for different static contact angles and orifice radii can be approximately reduced to a single bubble volume/flow rate relationship when a properly scaled bubble volume at detachment is plotted versus a properly scaled volumetric gas flow rate. This data reduction permits an easy estimation of the bubble volume for any constant volumetric gas flow rate.

Original language	English
Pages (from-to)	41-49
Number of pages	9
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	290
Issue number	1-3
DOIs	https://doi.org/10.1016/j.colsurfa.2006.04.046
State	Published - 15 Nov 2006
Externally published	Yes

Keywords

Bubble detachment
Bubbles
Contact angle
Multiphase flow
Wettability

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10.1016/j.colsurfa.2006.04.046

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title = "Effect of wetting conditions and flow rate on bubble formation at orifices submerged in water",

abstract = "An experimental investigation has been carried out on the generation of bubbles due to the injection of a constant flow rate of air through an orifice submerged in water. Orifices of different radii drilled in horizontal plates of different materials, both hydrophilic and hydrophobic, have been used to cover a range of static contact angles (68° ≤ θ0 ≤ 123°), and a wide range of volumetric gas flow rates (0.5 mm3/s ≤ Q ≤ 1.33 × 104 mm3/s) has been investigated. It is shown that data for different static contact angles and orifice radii can be approximately reduced to a single bubble volume/flow rate relationship when a properly scaled bubble volume at detachment is plotted versus a properly scaled volumetric gas flow rate. This data reduction permits an easy estimation of the bubble volume for any constant volumetric gas flow rate.",

keywords = "Bubble detachment, Bubbles, Contact angle, Multiphase flow, Wettability",

author = "G. Corchero and A. Medina and Higuera, {F. J.}",

note = "Funding Information: The authors acknowledge support of the Spanish Ministerio de Educaci{\'o}n y Ciencia through project DPI2002-04550-C07-05 and through programme SAB2002-0137, which allowed a sabbatical stay of one of us (A.M.) in Madrid.",

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AU - Corchero, G.

AU - Medina, A.

AU - Higuera, F. J.

N1 - Funding Information: The authors acknowledge support of the Spanish Ministerio de Educación y Ciencia through project DPI2002-04550-C07-05 and through programme SAB2002-0137, which allowed a sabbatical stay of one of us (A.M.) in Madrid.

PY - 2006/11/15

Y1 - 2006/11/15

N2 - An experimental investigation has been carried out on the generation of bubbles due to the injection of a constant flow rate of air through an orifice submerged in water. Orifices of different radii drilled in horizontal plates of different materials, both hydrophilic and hydrophobic, have been used to cover a range of static contact angles (68° ≤ θ0 ≤ 123°), and a wide range of volumetric gas flow rates (0.5 mm3/s ≤ Q ≤ 1.33 × 104 mm3/s) has been investigated. It is shown that data for different static contact angles and orifice radii can be approximately reduced to a single bubble volume/flow rate relationship when a properly scaled bubble volume at detachment is plotted versus a properly scaled volumetric gas flow rate. This data reduction permits an easy estimation of the bubble volume for any constant volumetric gas flow rate.

AB - An experimental investigation has been carried out on the generation of bubbles due to the injection of a constant flow rate of air through an orifice submerged in water. Orifices of different radii drilled in horizontal plates of different materials, both hydrophilic and hydrophobic, have been used to cover a range of static contact angles (68° ≤ θ0 ≤ 123°), and a wide range of volumetric gas flow rates (0.5 mm3/s ≤ Q ≤ 1.33 × 104 mm3/s) has been investigated. It is shown that data for different static contact angles and orifice radii can be approximately reduced to a single bubble volume/flow rate relationship when a properly scaled bubble volume at detachment is plotted versus a properly scaled volumetric gas flow rate. This data reduction permits an easy estimation of the bubble volume for any constant volumetric gas flow rate.

KW - Bubble detachment

KW - Bubbles

KW - Contact angle

KW - Multiphase flow

KW - Wettability

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DO - 10.1016/j.colsurfa.2006.04.046

M3 - Artículo

SN - 0927-7757

VL - 290

SP - 41

EP - 49

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 1-3

ER -

Effect of wetting conditions and flow rate on bubble formation at orifices submerged in water

Abstract

Keywords

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