Interfacial area of bubbly flow in a relatively large diameter pipe

Sun, Xiaodong; Smith, T. R.; Kim, Seung-Jin; Ishii, Mamoru; Uhle, Jennifer

doi:10.1016/s0894-1777(02)00220-0

Cited by 42 publications

(9 citation statements)

References 11 publications

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“…Although many studies have contributed to the topic of the large-diameter vertical pipes (Hills, 1976(Hills, , 1993Shipley, 1984;Hirao et al, 1986;Ohnuki and Akimoto, 1996;Hasanein et al, 1997;Cheng et al, 1998;Ohnuki and Akimoto, 2000;Shoukri et al, 2000;Prasser et al, 2002;Sun et al, 2002;Oddie et al, 2003;Hibiki and Ishii, 2003;Shen et al, 2005;Prasser et al, 2005;Omebere-Iyari et al, 2007Schlegel et al, 2009;Lucas et al, 2010;Shen et al, 2012), a majority of the work performed was restricted to pipe diameter of intermediate sizes (D 200 mm) because this was considered to be an optimum choice from a cost analysis point of view. Only a few studies have been conducted for very large-diameter sizes (300 <D < 500 mm) (Shipley, 1984;Ohnuki and Akimoto, 1996;Hasanein et al, 1997;Yoneda et al, 2002).…”

Section: Review Of Other Large-diameter Vertical Upflow Workmentioning

confidence: 99%

Experimental Study of Two-Phase Air–Water Flow in Large-Diameter Vertical Pipes

Ali

Yeung

2015

Chemical Engineering Communications

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Recently, due to an increase in production demand in nuclear and oil and gas industries, the requirement to migrate toward larger pipe sizes for future developments has become essential. However, it is interesting to note that almost all the research on two-phase gas-liquid flow in vertical pipe upflow is based on small-diameter pipes (D 100 mm), and the experimental work on the two-phase gas-liquid flow in large-diameter (D > 100 mm) vertical pipes is scarce. Under the above circumstances, the application of modeling tools=correlations based on small-diameter pipes in predicting flow behavior (flow pattern, void fraction, and pressure gradient) poses severe challenges in terms of accuracy. The results presented in this article are motivated by the need to introduce the research work done to the industries where the data pertaining to large-diameter vertical pipes are scarce and there is a lack of understanding of two-phase gas-liquid flow behavior in large-diameter (D > 100 mm) vertical pipes.The unique aspect of the results presented here is that the experimental data have been generated for a 254-mm inner diameter vertical pipe that forms an excellent basis for the assessment of modeling tools=correlations. This article (i) presents the results of a systematic investigation of the flow patterns in large-diameter vertical pipes and identifies the transition between subsequent flow patterns, (ii) compares it directly with the existing large-(150 mm) and small-diameter data (28 mm and 32 mm) in the same airwater superficial velocity range, (iii) exemplifies that the existing available empirical correlations=models=codes are significantly in error when applied to large-diameter vertical pipes for predictions, and last (iv) assesses the predictive capability of a well-known commercial multiphase flow simulator.

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Section: Review Of Other Large-diameter Vertical Upflow Workmentioning

confidence: 99%

Experimental Study of Two-Phase Air–Water Flow in Large-Diameter Vertical Pipes

Ali

Yeung

2015

Chemical Engineering Communications

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“…A scale-up effect on the flow in circular pipes has been reported [23][24][25][26][27][28][29][30]. In large circular pipes, the gas-liquid bubbly flow shows the following characteristics: (1) the strong turbulence Table 1.…”

Section: Introductionmentioning

confidence: 96%

Upward air–water bubbly flow characteristics in a vertical square duct

Sun

Kunugi

Shen

et al. 2013

Journal of Nuclear Science and Technology

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In nuclear engineering fields, gas-liquid bubbly flows exist in channels with various shape and size crosssections. Although many experiments have been carried out especially in circular pipes, those in a noncircular duct are very limited. To contribute to the development of gas-liquid bubbly flow model for a noncircular duct, detail measurements for the air-water bubbly flow in a square duct (side length: 0.136 m) were carried out by an X-type hot-film anemometry and a multi-sensor optical probe. Local flow parameters of the void fraction, bubble diameter, bubble frequency, axial liquid velocity and turbulent kinetic energy were measured in 11 two-phase flow conditions. These flow conditions covered bubbly flow with the area-averaged void fraction ranging from 0.069 to 0.172. A pronounced corner peak of the void fraction was observed in a quarter square area of a measuring cross-section. Due to a high bubble concentration in the corner, the maximum values of both axial liquid velocity and turbulent kinetic energy intensity were located in the corner region. It was pointed out that an effect of the corner on accumulating bubble in the corner region changed the distributions of axial liquid velocity and turbulent kinetic energy intensity significantly.

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“…In order to obtain a more reliable interfacial area transport equation, some experiments for the phase distribution of local parameters in two-phase flow are indispensable. Over the past few years, a large number of the experiments regarding gas-liquid bubbly flow have been performed [1][2][3][4][5][6][7][8]. Revankar and Ishii [9] observed that the local IAC appears as a wall-peak profile in a vertical tube.…”

Section: Introductionmentioning

confidence: 99%

Phase Distribution for Subcooled Flow Boiling in an Inclined Circular Tube

Bao

Xie

et al. 2018

International Journal of Photoenergy

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An experimental investigation of phase distribution for subcooled flow boiling in an inclined circular tube (i.d. 24 mm) was conducted in this paper. The local interfacial parameters were measured by a double-sensor optical fiber probe, and the measurements were performed on three different directions in the inclined tube cross section. The experiment shows that the phase distribution under the inclined condition is different from the phase distribution under the vertical condition. The profiles skewed highly for 90°and 45°direction in the tube cross section, whereas the profile was also symmetrical at 0°direction. These results can be explained by the fact that buoyancy caused the bubbles to move toward the top of the tube cross section under inclined condition. In addition, the typical distributions were also influenced by the inclination angles.

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Interfacial area of bubbly flow in a relatively large diameter pipe

Cited by 42 publications

References 11 publications

Experimental Study of Two-Phase Air–Water Flow in Large-Diameter Vertical Pipes

Experimental Study of Two-Phase Air–Water Flow in Large-Diameter Vertical Pipes

Upward air–water bubbly flow characteristics in a vertical square duct

Phase Distribution for Subcooled Flow Boiling in an Inclined Circular Tube

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