Particle image velocimetry for characterizing the flow structure of oil–water flow in horizontal and slightly inclined pipes

Kumara, W.A.S.; Halvorsen, Britt; Melaaen, Morten C.

doi:10.1016/j.ces.2010.03.045

Cited by 45 publications

(47 citation statements)

References 17 publications

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“…Above this velocity ( U m = 0.5 m/s, Re oil = 2860), the flow reverses and moves upward in the core region the oil phase. This behaviour has not been observed in previous studies, which have generally considered flow conditions with Reynolds numbers either in the fully laminar or fully turbulent regimes (e.g., Kumara et al, 2010;Amundsen, 2011;Morgan et al, 2013 ). The same pattern can also be observed for WC = 20% at different mixture velocities, as presented in Fig.…”

Section: Flow Structures and Velocity Profilessupporting

confidence: 69%

“…These particles must be small enough to follow the flow and yet be able to scatter enough light to be captured by the high-speed cameras. Kumara et al, (2010) employed polyamide particles with a mean particle diameter of 20 μm and a density of 1.03 g/cm 3 . Pouplin et al, (2015) used fluorescent PMMA particles encapsulated with Rhodamine B with a particle diameter range between 1 and 20 μm and a density of 1.18 g/cm 3 for the study of a flow of heptane and 43% wt.…”

Section: Optical Diagnostic Techniquesmentioning

confidence: 99%

“…In another particularly interesting effort, Kumara et al, (2010) employed PIV to characterise the flow structures in oilwater flow in a 56-mm diameter stainless steel pipe. The RIs of the test fluids were not matched, hence, the light was refracted as it passed through the liquid-liquid interface enabling accurate information to be obtained in only one phase (i.e., before the light reached the interface).…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of liquid–liquid flows in horizontal pipes using simultaneous two–line planar laser–induced fluorescence and particle velocimetry

Ibarra

Zadrazil

Matar

et al. 2018

International Journal of Multiphase Flow

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a b s t r a c tExperimental investigations are reported of stratified and stratified-wavy oil-water flows in horizontal pipes, based on the development and application of a novel simultaneous two-line (two-colour) technique combining planar laser-induced fluorescence with particle image/tracking velocimetry. This approach allows the study of fluid combinations with properties similar to those encountered in industrial field-applications in terms of density, viscosity, and interfacial tension, even though their refractive indices are not matched, and represents the first attempt to obtain detailed, spatiotemporally-resolved, full 2-D planar-field phase and velocity information in such flows. The flow conditions studied span mixture velocities in the range 0.3-0.6 m/s and low water-cuts up to 20%, corresponding to in situ (local) Reynolds numbers of 1750-3350 in the oil phase and 2860-11,650 in the water phase, and covering the laminar/transitional and transitional/turbulent flow regimes for the oil and water phases, respectively. Detailed, spatiotemporally-resolved in situ phase and velocity data in a vertical plane aligned with the pipe centreline and extending across the entire height of the channel through both phases are analysed to provide statistical information on the interface heights, mean axial and radial (vertical) velocity components, (rms) velocity fluctuations, Reynolds stresses, and mixing lengths. The mean liquid-liquid interface height is mainly determined by the flow water cut and is relatively insensitive (up to 20% the highest water cut) to changes in the mixture velocity, although as the mixture velocity increases the interfacial profile transitions gradually from being relatively flat to containing higher amplitude waves. The mean velocity profiles show characteristics of both laminar and turbulent flow, and interesting interactions between the two co-flowing phases. In general, mean axial velocity profiles in the water phase collapse to some extent for a given water cut when normalised by the mixture velocity; conversely, profiles in the oil phase do not. Strong vertical velocity components can modify the shape of the axial velocity profiles. The axial turbulence intensity in the bulk of the water layer amounts to about 10% of the peak mean axial velocity in the studied flow conditions. In the oil phase, the axial turbulence intensity increases from low values to about 10% at the higher Reynolds numbers, perhaps due to transition from laminar to turbulent flow. The turbulence intensity showed peaks in regions of high shear, i.e., close to the pipe wall, and at the liquid-liquid interface. The development of the mixing length in the water phase, and also above the liquid-liquid interface in the oil phase, agrees reasonably well with predicted variations described by the von Karman constant. Finally, evidence of secondary flow structures both above and below the interface exists in the vertical velocity profiles, which is of interest to explore further.

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Section: Flow Structures and Velocity Profilessupporting

confidence: 69%

Section: Optical Diagnostic Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of liquid–liquid flows in horizontal pipes using simultaneous two–line planar laser–induced fluorescence and particle velocimetry

Ibarra

Zadrazil

Matar

et al. 2018

International Journal of Multiphase Flow

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show abstract

“…Huang et al (2007) measured the water holdup in a horizontal kerosene-water two-phase flow using an intrusive capacitance probe. Kumara et al (2009Kumara et al ( , 2010 measured the local phase volume fraction and the local velocity distribution in a 56 mm ID steel pipe by applying a single-bundle gamma density gauge and particle image velocimetry (PIV) technique. Zhai et al (2012) presented liquid holdup measurements under conductive horizontal oil-water flows.…”

Section: Introductionmentioning

confidence: 99%

Experimental flow pattern map, slippage and time–frequency representation of oil–water two-phase flow in horizontal small diameter pipes

Zhai

Jin

Zong

et al. 2015

International Journal of Multiphase Flow

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“…Piela et al [6] conducted experiments to study the phase inversion behavior of horizontal oil-water flows. Kumara et al [7] employed the particle image velocimetry technique to characterize the flow structure of oil-water flows in a horizontal pipe. Al-Wahaibi and Angeli [8,9] made an experimental investigation on the transition from a horizontal oil-water stratified flow to a nonstratified flow and also experimentally studied the interfacial waves in stratified horizontal oil-water flows.…”

Section: Introductionmentioning

confidence: 99%

Multivariate recurrence network analysis for characterizing horizontal oil-water two-phase flow

et al. 2013

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Characterizing complex patterns arising from horizontal oil-water two-phase flows is a contemporary and challenging problem of paramount importance. We design a new multisector conductance sensor and systematically carry out horizontal oil-water two-phase flow experiments for measuring multivariate signals of different flow patterns. We then infer multivariate recurrence networks from these experimental data and investigate local cross-network properties for each constructed network. Our results demonstrate that a cross-clustering coefficient from a multivariate recurrence network is very sensitive to transitions among different flow patterns and recovers quantitative insights into the flow behavior underlying horizontal oil-water flows. These properties render multivariate recurrence networks particularly powerful for investigating a horizontal oil-water two-phase flow system and its complex interacting components from a network perspective.

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Particle image velocimetry for characterizing the flow structure of oil–water flow in horizontal and slightly inclined pipes

Cited by 45 publications

References 17 publications

Dynamics of liquid–liquid flows in horizontal pipes using simultaneous two–line planar laser–induced fluorescence and particle velocimetry

Dynamics of liquid–liquid flows in horizontal pipes using simultaneous two–line planar laser–induced fluorescence and particle velocimetry

Experimental flow pattern map, slippage and time–frequency representation of oil–water two-phase flow in horizontal small diameter pipes

Multivariate recurrence network analysis for characterizing horizontal oil-water two-phase flow

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