Bubble formation process from a novel nozzle design in liquid cross-flow

Controlling bubble diameter and bubble size distribution is important for a variety of applications and active fields of research. In this study the formation of bubbles from porous plates in a liquid cross-flow is examined experimentally. By injecting air through porous plates of various media grades (0.2 to 100) into liquid flows in rectangular channels of varying aspect ratio (1–10) and gas/liquid flow rates the impact of the various factors is presented. Image processing techniques were used to measure bubble diameters and capture their formation from the porous plates. Mean bubble diameters ranged from 0.06–1.21 mm. The present work expands upon the work of [1] and further identifies the relative importance of wall shear stress, air injector pore size and gas to liquid mass flow ratio on bubble size and size distribution.

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A model for bubble formation from an orifice with liquid cross-flow

Chemical Engineering Science ◽

10.1016/0009-2509(93)80081-z ◽

1993 ◽

Vol 48 (11) ◽

pp. 2049-2059 ◽

Cited By ~ 50

Author(s):

S.H. Marshall ◽

M.W. Chudacek ◽

D.F. Bagster

Keyword(s):

Bubble Formation ◽

Cross Flow

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Experimental Study of Bubble Behaviour in a Flowing Liquid Layer

Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation ◽

10.1115/icone2020-16397 ◽

2020 ◽

Author(s):

Zhengzheng Zhang ◽

Liangxing Li ◽

Shuanglei Zhang ◽

Afnan Saleem

Keyword(s):

Liquid Layer ◽

Flow Rate ◽

Liquid Flow ◽

Formation Process ◽

Bubble Formation ◽

Water Flow Rate ◽

Nucleation Site ◽

Flowing Liquid ◽

Bubble Detachment ◽

Smooth Channel

Abstract A visualized experimental system is designed and constructed to investigate the bubble dynamic in a flowing liquid layer. Motivated by reducing uncertainties and digging a deep understand on the formation mechanism of boiling bubbles, the bubbles are formed by injecting air through a submerged orifice in our present work, where the influence of thermal physics, nucleation site density and dry spot are stripped. The water flow rate and the air flow rate are in the range of 72–324 ml/min and 0.8–2.0 ml/min, respectively. The bubble formation process in the smooth channel and the rib channel are investigated. The results state that increasing the liquid flow rates lead to the increasing bubble detachment frequency and the decreasing bubble detachment volume. Besides, the larger the liquid flow rate is, the closer the bubble center of mass is to the wall. The rib has a significant influence on the bubble formation process. In the rib channel, it is more difficult for bubbles to detach from the orifice compared that in a smooth channel. Besides, the bubble detachment volume in a rib channel is larger than it in a smooth channel.

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Bubble Formation in Droplet Dosing Devices for Liquid Medicine

Proceedings ◽

10.3390/proceedings2130747 ◽

2018 ◽

Vol 2 (13) ◽

pp. 747

Author(s):

Sebastian Hummel ◽

Michael Haub ◽

Martin Bogner ◽

Hermann Sandmaier

Keyword(s):

Formation Process ◽

Bubble Formation ◽

Mathematical Approach ◽

Self Medication ◽

Liquid Medicine

Droplet dosing devices for liquid medicine are widely spread in self-medication for prevention or in the event of illness. This paper presents investigations on the often unnoticed process of bubble formation in droplet dosing devices for liquid medicine which is decisive for the whole functionality of these systems. To obtain information about this process and how it affects the dosage, drip operations with an exemplary device have been evaluated. Based on these evaluations the bubble formation is explained qualitatively. Finally a mathematical approach to predict critical changes in the bubble formation process is presented.

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Bubble formation regimes during gas injection into a liquid cross flow in a conduit

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.22680 ◽

2016 ◽

Vol 95 (2) ◽

pp. 372-385 ◽

Cited By ~ 5

Author(s):

Miguel A. Balzán ◽

R. Sean Sanders ◽

Brian A. Fleck

Keyword(s):

Bubble Formation ◽

Gas Injection ◽

Cross Flow

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Large eddy simulation of the two-phase flow pattern and bubble formation process of a flow mixing nozzle under a gas–liquid mode

Fluid Dynamics Research ◽

10.1088/1873-7005/ab3f7e ◽

2019 ◽

Vol 51 (5) ◽

pp. 055510

Author(s):

Jin Zhao ◽

Zhi Ning ◽

Ming Lv

Keyword(s):

Large Eddy Simulation ◽

Flow Pattern ◽

Formation Process ◽

Two Phase Flow ◽

Bubble Formation ◽

Phase Flow ◽

Two Phase ◽

Eddy Simulation ◽

Flow Mixing ◽

Large Eddy

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Theoretical Analysis of CO2 Bubble Formation in Anode Flow Field of μDMFC

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.635-637.346 ◽

2014 ◽

Vol 635-637 ◽

pp. 346-353 ◽

Cited By ~ 2

Author(s):

Miao Miao Li ◽

Jun Geng ◽

Ru Peng Zhu

Keyword(s):

Mathematical Model ◽

Theoretical Analysis ◽

Flow Field ◽

Flow Velocity ◽

Liquid Velocity ◽

Bubble Formation ◽

Cross Flow ◽

Carbon Paper ◽

Gas Velocity ◽

Cross Flow Velocity

A mathematical model was established and validated to predict the microbubble diameter when it departing from the carbon paper and moving into the channel of μDMFC. Single bubble behaviors were studied using the model, which took the gas velocity, liquid cross-flow velocity, micro porous diameter and other parameters into account. Results indicate that the microbubble departure diameter decreases with the increasing liquid velocity, and increases with the increasing micro porous diameter and increasing gas velocity.

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