Applications of Venturi Principle to Water Aeration Systems

Baylar, Ahmet; Özkan, Fahri

doi:10.1007/s10652-005-5664-9

Cited by 72 publications

(38 citation statements)

References 20 publications

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“…Bubbles can be produced by cavitation, initiated by hydrodynamic means, ultrasound, a laser or particle beam [10], or by direct dispersion of the gas in a liquid with different diffusers, usually made from porous materials [11], with gas flow through a submerged nozzle or orifice [12][13][14], in swirling jet flow [15], a Venturi nozzle [16], etc. An excellent state-of-theart review of different schemes and devices for small-bubble generation and their applications can be found in a recent paper [17].…”

Section: Introductionmentioning

confidence: 99%

Generation of Two‐Phase Air‐Water Flow with Fine Microbubbles

2016

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Aiming at the development of a low-cost technology for multipurpose water and surface treatment in the chemical industry and beyond, using microbubbles, a novel scheme of liquid-gas interaction within a specially designed bubble generator was tested. Its efficiency for the production of microbubbles with a size distribution in the micron range is confirmed. The basic element of the device is a vortex chamber with water supply through tangential ducts, while the gas (air) is introduced in a highly turbulent swirling flow of water in radial direction through the orifice in the gas supply duct, located on the chamber axis. Bubble diameters, bubble velocities in the pipe flow and effect of the output pressure on the bubble size distribution were studied.

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Section: Introductionmentioning

confidence: 99%

Generation of Two‐Phase Air‐Water Flow with Fine Microbubbles

2016

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“…This reduces the possibility of caustic chemicals being sprayed into the air through cracks or breaks in the pipe. Recently, Baylar and Emiroglu [1], Emiroglu and Baylar [2], Baylar et al [3], Baylar and Ozkan [4], Ozkan et al [5] and Baylar et al [6,7] studied the use of venturi tubes in water aeration systems. All of these works were experimental and none concentrated specifically on Computational Fluid Dynamics (CFD) modeling of venturi tubes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Venturi Flows for Determining Air Injection Rates Using Fluent V6.2

Baylar

Aydın

Ünsal

et al. 2009

MCA

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Abstract-As the water passes through a restriction in a pipe, it forms a vacuum at the end of the restriction. A hole bored into the pipe at a point where this vacuum occurs will cause air to be drawn into the main flow. One example of this mechanism is seen in the venturi tube. When a minimal amount of differential pressure exists between the inlet and outlet sides of the venturi tube, a vacuum occurs at suction holes of the venturi tube. Venturi aeration is a method of aeration that has become popular in recent years. In present paper, air injection rates of venturi tubes are analyzed using Computational Fluid Dynamics modeling. These analyses are carried out by means of the program FLUENT V6.2 that uses finite volume theory. There is a good agreement between the measured air injection rates and the values computed from FLUENT CFD program.

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“…He and Bai [9] found that the k-ε model was in agreement with experimental data on wet gas flow in the Venturi meter. Due to the water quality improvement caused by aeration, by using a Venturi flow with holes, the aeration coefficient relationship was examined and found to be well within the geometrical parameters experimentally and numerically [10][11][12].…”

Section: Introductionmentioning

confidence: 92%

3-D Numerical Investigation on Oxygen Transfer in a Horizontal Venturi Flow with Two Holes

Yin¹,

Feng²,

Wang³

et al. 2018

Water

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Abstract:In order to investigate the dissolved oxygen increase caused by air suction in a horizontal Venturi flow with two holes, a 3-D computational fluid dynamics model was used to explore the water and bubble mixture flow, coupled with a dissolved oxygen transfer model. A series of experiments were conducted to validate the mathematical model. A relative saturation coefficient correlation was examined factoring in dissolved oxygen concentration at the inlet, water velocity at the inlet, the hole's diameter, contraction ratio at throat section, and the downstream length of Venturi pipe. It was found that the relative saturation coefficient increases with increasing dissolved oxygen concentration at the inlet and downstream length of Venturi pipe respectively. However, it increases with decreasing water velocity at the inlet and contraction ratio at the throat section to some extent. The hole's diameter plays a complex role in the relative saturation coefficient. The dimensional analysis method and the least square method were used to deduce a simple formula for the relative saturation coefficient, and this was consistent with related data.

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Applications of Venturi Principle to Water Aeration Systems

Cited by 72 publications

References 20 publications

Generation of Two‐Phase Air‐Water Flow with Fine Microbubbles

Generation of Two‐Phase Air‐Water Flow with Fine Microbubbles

Numerical Modeling of Venturi Flows for Determining Air Injection Rates Using Fluent V6.2

3-D Numerical Investigation on Oxygen Transfer in a Horizontal Venturi Flow with Two Holes

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