A flexible image analysis method for measuring bubble parameters

Zou, Xu; Zhang, Zhibing; Tian, Hongzhou

doi:10.1016/j.ces.2015.10.033

Cited by 47 publications

(15 citation statements)

References 31 publications

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“…Furthermore, the distance dependency with incident endoscopes is not negligible. Without additional measures to limit the measurement volume and to increase the contrast , , measurements are difficult and a promising alternative is the transmitted light method . However, in many applications the camera and illumination are positioned non‐invasively outside the apparatus due to a lesser design effort.…”

Section: Measurement Methodsmentioning

confidence: 99%

Particle Measurement Techniques in Fluid Process Engineering

Lichti

Bart

2018

ChemBioEng Reviews

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Droplets, bubbles, or solid particle concentrations and their particle size distributions markedly influence the process conditions. In this article, an overview with respect to popular invasive and non‐invasive local measurement techniques for bubbles and droplets will be given. It starts with capillary suction probes, laser Doppler anemometry and finally covers actual developments in tomography and optical endoscopic measurement techniques. Furthermore, the possibilities and limitations of analyzing particle size distributions with these different methods in various application fields will be discussed.

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Section: Measurement Methodsmentioning

confidence: 99%

Particle Measurement Techniques in Fluid Process Engineering

Lichti

Bart

2018

ChemBioEng Reviews

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“…Ohne Zusatzmaßnahmen zur Abgrenzung des Messvolumens und zur Steigerung des Kontrastes wie bei , berichtet, sind Messaufgaben selten zufriedenstellend zu lösen. Eine Alternative ist die Durchlichtmethode . Bei vielen Autoren wurden jedoch Kamera und Beleuchtung nichtinvasiv außerhalb des Apparates positioniert.…”

Section: Messmethodenunclassified

Particle Measurement Techniques in Fluid Process Engineering

Lichti

Bart

2017

Chemie Ingenieur Technik

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Partikuläre Systeme sind ubiquitär und kommen in der Fluidverfahrenstechnik in Form von Tropfen, Blasen oder Feststoffpartikeln vor. Nicht nur ihre Konzentration, sondern auch ihre Verteilung bestimmt oft maßgeblich den jeweiligen Prozess. In diesem Beitrag wird ein Ü berblick über gängige invasive und nichtinvasive Messverfahren zur Erfassung von Blasen und Tropfen vorgestellt. Die Vor-und Nachteile zur Erfassung von Phasen-und Partikelgrößenverteilungen in Mehrphasensystemen werden angesprochen und Funktionsprinzipien, deren Anwendbarkeit im Labor sowie Grenzen im industriellen Einsatz aufgezeigt und diskutiert. Particle Measurement Techniques in Fluid Process EngineeringDroplets, bubbles or solid particles concentration and their particle size distribution markedly influence process conditions. In this article an overview in respect to popular invasive and non-invasive local measurement techniques for bubbles and droplets will be given. It starts with capillary suction probes, laser Doppler anemometry and finally covers actual developments in tomography and optical endoscopic measurement techniques. Furthermore, the possibilities and limitations of analyzing particle size distributions within different methods as well as application fields and their limits will be discussed.

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“…While a vast literature on hydrodynamic parameters such as gas holdup and bubble behaviour influencing performance of BC are available in literature [2][3][4], literature on foam behaviour in BC are not many [5][6][7][8]. Bennet et al [5] used Electrical Capacitance Tomography (ECT) to clearly identify aerated water, foam and air from local water fractions.…”

Section: Introductionmentioning

confidence: 99%

“…Several investigators have started using efficient image processing methods for measuring these parameters [10][11][12][13][14][15][16][17][18][19]. The image processing algorithms reported in literature are bubble segmentation and reconstruction techniques [17], watershed algorithm [12,13], algorithm combining geometrical, optical and topological information [14] and recursive algorithm [4] etc. These were applied to process the high-speed bubbly flow images.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Thickness of Foam layer and Entrance Region in a Bubble Column using Image Processing Technique

Agarwal¹,

Verma²

2019

IJITEE

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Photographic method is a direct method for study of bubble behavior. Hydrodynamic study in a rectangular bubble column (0.37m X 0.2m X 0.02m) for air-water system was studied using photographic technique by recording movie at 120fps. Image processing tools were applied to measure regions of gas-liquid dispersion, entrance, foam layer and bubble-bursting were identified. The foam layer thickness showed maxima at Ug = 0.1 m s-1 . It decreased with increasing static bed height. The width of entry region also passed through maxima, though it was not sharp. The width of entry region increased with increasing settled bed height. Gas holdup measured in terms of pixel density deviated from experimental values with increasing superficial gas velocity due to overlapping bubbles. The average gas holdup decreased with increasing static bed height.

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A flexible image analysis method for measuring bubble parameters

Cited by 47 publications

References 31 publications

Particle Measurement Techniques in Fluid Process Engineering

Particle Measurement Techniques in Fluid Process Engineering

Particle Measurement Techniques in Fluid Process Engineering

Measurement of Thickness of Foam layer and Entrance Region in a Bubble Column using Image Processing Technique

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