Turbulence structure of air-water bubbly flow—III. transport properties

Serizawa, Akimi; Kataoka, Isao; Michiyoshi, Itaru

doi:10.1016/0301-9322(75)90013-0

Cited by 103 publications

(42 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These instantaneous fluctuations cause bubble deformations which themselves react to the perturbation by producing chaotic and highly variable flow fields organized as eddies (Serizawa et al, 1975;Schlüter, 2002). With increasing gas contents, the bubble-induced turbulences become more dominant resulting in an increased flow resistance.…”

Section: Frequency Distributionsmentioning

confidence: 99%

Automated gas bubble imaging at sea floor – a new method of in situ gas flux quantification

2010

View full text Add to dashboard Cite

Abstract. Photo-optical systems are common in marine sciences and have been extensively used in coastal and deepsea research. However, due to technical limitations in the past photo images had to be processed manually or semiautomatically. Recent advances in technology have rapidly improved image recording, storage and processing capabilities which are used in a new concept of automated in situ gas quantification by photo-optical detection. The design for an in situ high-speed image acquisition and automated data processing system is reported ("Bubblemeter"). New strategies have been followed with regards to back-light illumination, bubble extraction, automated image processing and data management. This paper presents the design of the novel method, its validation procedures and calibration experiments. The system will be positioned and recovered from the sea floor using a remotely operated vehicle (ROV). It is able to measure bubble flux rates up to 10 L/min with a maximum error of 33% for worst case conditions. The Bubblemeter has been successfully deployed at a water depth of 1023 m at the Makran accretionary prism offshore Pakistan during a research expedition with R/V Meteor in November 2007.

show abstract

Section: Frequency Distributionsmentioning

confidence: 99%

Automated gas bubble imaging at sea floor – a new method of in situ gas flux quantification

2010

View full text Add to dashboard Cite

show abstract

“…(95)), the radial distributions of interfacial area concentration are predicted and compared with experimental data. Serizawa et al (1975Serizawa et al ( , 1992 For empirical coefficient, K cai is assumed to be 0.01 based o n e x p e r i m e n t a l d a t a . T h e condition of flow regime transition from bubbly to churn flow is given in terms of area averaged void fraction,  based on experimental results which is given by…”

Section: Experimental Researches On Interfacial Area Concentrationmentioning

confidence: 99%

Transport of Interfacial Area Concentration in Two-Phase Flow

Kataoka¹,

Yoshida²,

Naitoh³

et al. 2012

Nuclear Reactors

Self Cite

View full text Add to dashboard Cite

“…Only one study has reported vapor turbulence measurements in &-water annular flows with a liquid film interface (Azzopardi and Teixeira, 1994b). They concluded that turbulence intensities were higher than the values that would Hot-film anemometry (HFA) techniques have been used extensively for local turbulence measurements in both bubbly flow (Serizawa et al, 1975;h@chiyoshi and Serizawa, 1986;Wang et al, 1990;Lance and Bataille, 1991;Hogsett and Ishii, 1997) and dropletlparticle flows (Ginzburg, 1971;Hetsroni and Sokolov, 1971 The specific objectives of the present study are to: a) extend the established hot-film anemometer technique for turbulence measurements in refrigerant flows using a dual-sensor probe, b) perform drop size and turbulence measurements in the vapor core at gas-liquid density ratios comparable to steam-water at high pressure, and c) provide insight into the complex physical phenomena characteristic of turbulent, annular two-phase flows.…”

Section: Introductionmentioning

confidence: 99%