The total air budget in oxygenated water flowing in a drip tape irrigation pipe

Bhattarai, Surya P.; Balsys, R.J.; Wassink, David; Midmore, David J.; Torabi, M.

doi:10.1016/j.ijmultiphaseflow.2013.01.004

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…For one-line transmission, the gas void fraction peaks at 180 m and then starts dropping to the end of the drip tap. This may indicates that "plugs" of air, as observed by Das et al (2005); Wren et al (2005); Bhattarai et al (2013Bhattarai et al ( , 2015, form at 180 m.…”

Section: Treatmentmentioning

confidence: 84%

“…Torabi et al (2013) demonstrated effects of the connector type, water flow in the emitter, pipe diameter, and the layout of the pipeline all significantly altering the distribution of bubbles in irrigation water aeration. To intuitively grasp the flow state of oxygen in aerated irrigation, analyses were conducted to elucidate the air flow in two-phase flow in irrigation tape (Bhattarai et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The measurement of air/water ratio is used to quantify the fraction of air in the irrigation water. Through the use of a bubble visualization unit, the total air void fraction in aerated irrigation water was estimated by Bhattarai et al (2013). Torabi et al (2013) used a cylinder full of water inverted into a sink and filled with irrigation water to collect the air over a set time period from the end of the drip tape.…”

Section: Introductionmentioning

confidence: 99%

“…Through the use of a bubble visualization unit, the total air void fraction in aerated irrigation water was estimated by Bhattarai et al . (2013). Torabi et al .…”

Section: Introductionmentioning

confidence: 99%

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Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Liu

Huan

Balsys

et al. 2020

Irrigation and Drainage

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Aerating water using microbubbles in irrigation for drip and subsurface drip irrigation systems has been reported to produce positive effects on plant growth and yield. However, maintaining the uniformity of bubble distribution in irrigation lines across long-row configuration is a challenge. Air injection of microbubbles in irrigation water using a gas diffuser (Seair Diffusion System, Model SA75) has a significant gain in dissolved oxygen (DO) distribution over 850 m length of drip tape. Furthermore, with oxygen injection with a Venturi, DO in irrigation water reached as high as 44 ppm and was maintained well above 35 ppm up to a distance of 700 m and did not drop below 20 ppm, even at a distance of 850 m. Pressure compensated emitters recorded significantly higher DO concentrations compared to nonpressure compensated emitters along the entire length of the irrigation line. Additionally, use of surfactant in irrigation water, up to 4 ppm, resulted in increased gas void fraction and DO concentration compared to the control for both air and oxygen injection irrigation. Highest oxygen saturation was recorded with 4 ppm surfactant, both for air injections (165%) and oxygen injection (438%) treatment along 200 m of non-pressure compensated drip tape.

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Section: Treatmentmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Through the use of a bubble visualization unit, the total air void fraction in aerated irrigation water was estimated by Bhattarai et al . (2013). Torabi et al .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Liu

Huan

Balsys

et al. 2020

Irrigation and Drainage

View full text Add to dashboard Cite

show abstract

“…Bhattarai et al studied the changes in the shape and size of the bubbles, the air void fraction along the drip line, and the influences of surfactant and orientation of the emitter to the ground plane. They found that when more surfactant was used in the emitter down position, a greater air fraction moved further along the drip line [22,23]. In addition, Li et al suggested that micro-nanobubble water could improve the anti-blocking performance of drip irrigation systems [6].…”

Section: Introductionmentioning

confidence: 99%

Motion Characteristics of Gas–Liquid Two-Phase Flow of Microbubbles in a Labyrinth Channel Used for Aerated Drip Irrigation

Liu

Wang

Zhang

et al. 2023

Water

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The indefinite characteristics of gas–liquid two-phase flow limit the usage of aerated drip irrigation. Gas–liquid two-phase flow in a labyrinth channel was observed using a particle tracking velocimetry (PTV) technique in this study. The motion trajectory and velocity vector of large numbers of microbubbles were characterized and analyzed at 0.01, 0.02, 0.04 MPa inlet pressure and in three labyrinth channels with different geometries. The results indicated that bubbly flow was the typical flow pattern in a labyrinth channel, with slug flow occurring occasionally. Smooth and gliding motion trajectories of bubbles were observed in the mainstream zone, while twisted trajectories were seen in the vortex zone. Increasing the inlet pressure increased the number of bubbles and the trajectory length in the vortex zone. When the inlet pressure increased from 0.02 to 0.04 MPa, the 25th percentile of Rc-t (the Ratio of Circular path length in the vortex zone to the Total trajectory length for a single bubble) increased from 0 to 12.3%, 0 to 6.1%, and 0 to 5.2% for channels A, B, and C, respectively; the 75th percentile increased from 31.3% to 43.9%, 27.5% to 31.9%, and 18.7% to 22.3%. The velocity vectors of the bubbles showed position dependence. Bubbles with high speed were found in the mainstream zone with their directions parallel to the water flow direction. Bubbles with low speed were seen in the vortex zone, moving in all directions. With inlet pressure increased from 0.01 to 0.04 MPa, the mean instantaneous velocities of bubbles in channels A, B, and C are increased by 106.2%, 107.6%, and 116.6%, respectively. At 0.04 MPa, channel A has the longest path length and the highest instantaneous velocity of bubbles in the vortex zone among three channels, exhibiting the highest anti-clogging performance of the three channels. This study will help in the comprehensive understanding of gas–liquid two-phase flow in a labyrinth channel used for aerated drip irrigation.

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Temporal and spatial dimension of dissolved oxygen saturation with fluidic oscillator and Mazzei air injector in soil-less irrigation systems

et al. 2016

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The total air budget in oxygenated water flowing in a drip tape irrigation pipe

Cited by 9 publications

References 10 publications

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Motion Characteristics of Gas–Liquid Two-Phase Flow of Microbubbles in a Labyrinth Channel Used for Aerated Drip Irrigation

Temporal and spatial dimension of dissolved oxygen saturation with fluidic oscillator and Mazzei air injector in soil-less irrigation systems

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The total air budget in oxygenated water flowing in a drip tape irrigation pipe

Cited by 9 publications

References 10 publications

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water*

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water*

Motion Characteristics of Gas–Liquid Two-Phase Flow of Microbubbles in a Labyrinth Channel Used for Aerated Drip Irrigation

Temporal and spatial dimension of dissolved oxygen saturation with fluidic oscillator and Mazzei air injector in soil-less irrigation systems

Contact Info

Product

Resources

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Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*