Flow pattern transitions in vertical and upwardly inclined lines

Weisman, J.; Kang, Su-Jin

doi:10.1016/0301-9322(81)90022-7

Cited by 204 publications

(63 citation statements)

References 6 publications

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“…Weisman et al (1979) proposed a flow pattern map for two-phase flows in smooth horizontal tubes. In a following article, they extended their flow pattern map for the whole range of inclination angles for upward flows (Weisman and Kang, 1981). For slightly upward flows, they found that the only difference with horizontal flow was the disappearance of the stratified flow.…”

Section: Flow Pattern Mapsmentioning

confidence: 99%

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Two-phase flow in inclined tubes with specific reference to condensation: A review

Lips

Meyer

2011

International Journal of Multiphase Flow

102

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Section: Flow Pattern Mapsmentioning

confidence: 99%

“…The angle of inclination varied from 15° to 90°. They proposed an overall flow pattern map for downward flow based on the flow pattern map of Weisman et al (1979) and of Weisman and Kang (1981).…”

Section: Flow Pattern Mapsmentioning

confidence: 99%

Two-phase flow in inclined tubes with specific reference to condensation: A review

Lips

Meyer

2011

International Journal of Multiphase Flow

102

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“…Based on the interface structures, several fl ow regimes can be identifi ed and commonly separated into three main groups; separated fl ows, dispersed fl ows and the last group would contain the fl ows such as bubbly annular, churn turbulent or slug fl ow. Although this classifi cation has been experimentally confi rmed since a few decades [1], the numerical simulation of complex two-phase fl ow regimes is still challenging and an universal model remains to be established.…”

Section: Introductionmentioning

confidence: 99%

Multifield hybrid method applied to bubble rising and coalescence

Denefle¹,

Mimouni²,

Caltagirone³

et al. 2014

Int. J. CMEM

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As a fi rst step towards a new approach for the simulation of two-phase fl ows, the objective of this work is to check out the prediction of a model dedicated to large and distorted bubbles on twobubble coalescence cases. The multifi eld hybrid approach for two-phase fl ow modelling consists in dealing separately with the small and spherical bubbles, treated with a dispersed approach, and with the large and distorted ones, whose interface is located. The overall method relies also on an existing building block, consisting in a set of averaged models dedicated to dispersed bubbles, which has already been validated and has given a reasonable agreement with experimental data in cases where the spherical shape assumption is still valid for the dispersed phase. This paper aims to assess a conservative interface locating method based on level set adapted to two-fl uid model for two-phase fl ows. The interface locating method is a part of a model dedicated to the simulation of large and distorted bubbles. At different liquid viscosities and densities, the model provides reasonable predictions of terminal velocities and shapes for rising bubble experiments. The main outcome is the simulation of bubble coalescence where the distortion of the interface during the coalescence phenomenon is followed. The ability to simulate coalescence phenomena correctly is an important issue in the modelling of slug fl ows with interface locating methods.

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“…They determined the flow patterns using visual observation and electrical conductance probe. They then compared their transition data to those reported by Mandhane et al (1974) and Weisman et al (1981). Mandhane et al (1974) carried out experimental work in a 50 mm internal diameter horizontal pipe using air-water as the model fluid while on the other hand Weisman et al (1981) conducted experimental work in a 12 mm, 25 mm and 51 mm internal diameter vertical and upwardly inclined pipes using air-water.…”

Section: Two-phase Film Thickness Distribution In 180 O Bendsmentioning

confidence: 99%

“…Mandhane et al (1974) carried out experimental work in a 50 mm internal diameter horizontal pipe using air-water as the model fluid while on the other hand Weisman et al (1981) conducted experimental work in a 12 mm, 25 mm and 51 mm internal diameter vertical and upwardly inclined pipes using air-water. Tingkuan et al (1986) concluded that their data fitted both the Mandhane et al (1974) and Weisman et al (1981) transition criteria well and that the major effect of the bend on the flow patterns is the considerable expansion of the stratified flow regime. This conclusion confirmed the earlier work of Hills (1973).…”

Section: Two-phase Film Thickness Distribution In 180 O Bendsmentioning

confidence: 99%