Bubble size distribution for bubbly-to-slug transition flow in narrow rectangular channel

Zhang, Muhao; Mi, Tao; Huang, Tao; Deng, Jian; He, Qingche; Gu, Zhixing; Zhang, Luteng; Ding, Shuhua; Pan, Liang‐ming

doi:10.1016/j.nucengdes.2022.111725

Cited by 8 publications

(5 citation statements)

References 49 publications

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“…Floating vegetation, as common riverway vegetation, profoundly impacts hydrodynamic forces and water quality (Li et al 2021;Rudi et al 2021). After adding aeration measures, sufficient oxygen will accelerate the retention of pollutants by vegetation and bacteria (Zhang et al 2022b). The results of this paper showed that floating vegetation is helpful for improving the oxygen mass transfer efficiency in aeration channels, but this was determined by comparing the results with Equation ( 5).…”

Section: Resultsmentioning

confidence: 97%

Research on bubbles and dissolved oxygen transfer in floating vegetated channels

Zhao,

Sun,

Bai

2024

Hydrology Research

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With river water quality deterioration in recent years, an increasing number of river water quality control studies have been conducted. Among relevant methods, aeration and vegetation planting are effective techniques. The combination of aeration and vegetation can improve the purification effect on the water quality. Based on flume experiments, the mass transfer coefficient of dissolved oxygen in rivers with floating vegetation patches of different diameters under hydrodynamics was studied. Large-diameter floating vegetation can effectively reduce the breaking of bubbles and increase the mass transfer coefficient of dissolved oxygen in rivers. According to mechanism analysis, a model of the oxygen mass transfer coefficient in floating vegetated channels was proposed, and a favorable simulation effect was obtained. This type of research could provide a theoretical basis for selecting and arranging vegetation in aeration floating vegetated channels.

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Section: Resultsmentioning

confidence: 97%

Research on bubbles and dissolved oxygen transfer in floating vegetated channels

Zhao,

Sun,

Bai

2024

Hydrology Research

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“…In contrast, measurements of tiny bubbles may be missed, 20 so the difference between the fitted and actual measurements in the low chord length range can also be attributed to systematic measurement errors in the low-value bubble sizes. 50 The distribution function with the minimum RMSE value under specific operating conditions is called the "optimal function". The number of operating conditions in which each distribution function becomes the "optimal function" is counted, as shown in Table 5.…”

Section: Judgment Of Fitting Resultsmentioning

confidence: 99%

“…This is because the probe is more likely to penetrate larger size bubbles. In contrast, measurements of tiny bubbles may be missed, so the difference between the fitted and actual measurements in the low chord length range can also be attributed to systematic measurement errors in the low-value bubble sizes …”

Section: Resultsmentioning

confidence: 99%

“…When λ and R̅ b are known, d B,vol can be calculated d normalB , normalv normalo normall = false[ 4 λ R̅ normalb 3 ( 1 + β ′ ) false] 1 / 3 …”

Section: Resultsmentioning

confidence: 99%

“…Comparison of predicted a i and experimental a i . a convenient method for predicting the actual size of the bubble.When λ and R̅ b are known, d B,vol can be calculated50…”

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confidence: 99%

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Prediction of Bubble Size Distribution above the Bubble-Breaking Plate

Wang

Zeng

et al. 2023

Ind. Eng. Chem. Res.

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The chord length distribution (CLD) of bubbles in the region above the bubble-breaking plate in the scrubbing−cooling chamber was studied experimentally using a conductivity probe. The predictive correlations of the shape parameters were established by fitting the CLD with a distribution function. The bubble shape was discussed, and the CLD was analytically converted to the size distribution of the direct contact of the probe. The results showed that the CLD has specific right-skewed characteristics, and the Rayleigh distribution has the best-fitting effect on the CLD. The correlation equation of the shape parameter k of the Rayleigh distribution concerning the Fr number, local gas holdup ε g , and dimensionless radius r/R was established. The predicted bubble size distributions (BSDs) based on ellipsoids are in good morphological agreement with the experimental size distributions. The relative error between the calculated and experimental values of the gas−liquid interface area was within ±20%, which verified the accuracy of the prediction of the BSD.

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The experimental research on subcooled flow boiling in vertical narrow rectangular channels with relatively Wide-Ranged parameters

Chen

Kuang

Zhao

et al. 2023

Applied Thermal Engineering

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Bubble size distribution for bubbly-to-slug transition flow in narrow rectangular channel

Cited by 8 publications

References 49 publications

Research on bubbles and dissolved oxygen transfer in floating vegetated channels

Research on bubbles and dissolved oxygen transfer in floating vegetated channels

Prediction of Bubble Size Distribution above the Bubble-Breaking Plate

The experimental research on subcooled flow boiling in vertical narrow rectangular channels with relatively Wide-Ranged parameters

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