An experimental investigation of oil-water flow in a serpentine channel

Der, Oguzhan; Bertola, Volfango

doi:10.1016/j.ijmultiphaseflow.2020.103327

Cited by 25 publications

(14 citation statements)

References 24 publications

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“…The authors have examined the proposed parameter using the Zhao et al data and found good agreement for parallel, plug, and droplet flow. Recently, researchers have used the same parameter to present their results and compare it with the universal map proposed by Yagodnitsyna et al ,,− For instance, Darekar et al found that the We · Oh is a good parameter for presenting the generalized flow patterns map of three different two immiscible liquid systems flowing in a microchannel using the Y-junction. To check the reliability of the generalized flow pattern map, they have also plotted the data of Kahsid et al for a liquid–liquid two-phase system (water + acetone–toluene) flowing in a square microchannel with a Y-junction.…”

Section: Flow Patternsmentioning

confidence: 99%

A Review on the Hydrodynamics of the Liquid–Liquid Two-Phase Flow in the Microchannels

Al-Azzawi

Mjalli

Husain

et al. 2021

Ind. Eng. Chem. Res.

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The ability of small and microchannels to enhance mass transfer, reduce diffusional limitations, and create a safer process has made them the best choice for process intensification. This study provides a review of the available experimental and computational literature on the hydrodynamics of liquid−liquid two-phase flow in microscale, namely, flow regimes, pressure drop, and flow structure. When two immiscible liquids flow in small channels, various flow patterns can be observed, with the development of those patterns being influenced by several parameters, such as the geometry of the mixing junction and channel, the channel material, the fluids properties, and the orientation of the flow. As part of the flow patterns observations and measurement, the velocity fields and internal circulation reported in the literature were reviewed in the context of the microparticle velocimetry (μPIV) implementation. Also, relevant to our study is the literature outlining, pressure drop, and the available models that have been used to predict it. These models are discussed in detail with special reference to flow patterns and fluids viscosities. Moreover, the numerical studies results using computational fluid dynamics (CFD) have also been reviewed and discussed, in terms of the validity of the simulation and the different parameters affecting slug formation and flow patterns. Each section of the discussion also points out the gaps in the research and proposes future work that could further develop the technology under a review of liquid−liquid two-phase flow in microchannels.

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Section: Flow Patternsmentioning

confidence: 99%

A Review on the Hydrodynamics of the Liquid–Liquid Two-Phase Flow in the Microchannels

Al-Azzawi

Mjalli

Husain

et al. 2021

Ind. Eng. Chem. Res.

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“…By adjusting the surface velocities of the two fluids separately using a dual-drive syringe pump, various flow patterns were produced. As a result, a flow pattern map may be created, which demonstrates considerable changes from the corresponding image produced for straight microchannels [14]. This study extended the applications of artificial intelligence on microreactor technology or microfluidics and facilitated understanding of complex hydrodynamics and flow patterns [15]…”

Section: Flow Pattern Mapmentioning

confidence: 77%

Two-Phase Flow Patterns of Air – Water and Oil in Mini Channel Against Horizontal Position

Sukamta,

Faiz,

Sudarja

et al. 2024

J. Phys.: Conf. Ser.

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Two-phase flow is the simplest form of multi-phase flow or multi-component flow. Inside a two-phase flow, two phases or components flow simultaneously. The most important thing to ensure is not to let a flow pattern occur that can increase the flow pressure to increase very extremely so that it will damage the piping system or channel, both on the mini, small channels, and large channels. The flow pattern’s main parameters include superficial velocity, fluid density, and viscosity. Therefore, it is crucial to examine how influential these parameters are in forming flow patterns. This experimental study used an acrylic pipe 160 mm long with a diameter of 1.6 mm in a horizontal position. The liquid solution used is a water-coconut oil emulsion of 350 mg/dl and a water-oil emulsion of 500 mg/dl. The superficial velocity of the gas (JG) = 0.083 m/s - 76.604 m/s and the superficial velocity of the liquid (JL) = 0.041 m/s - 4.145 m/s. The resulting Flow Pattern is Plug, Slug Annular, Annular, and churn. Changes in the mixture of water emulsions and coconut oil have little effect on the flow pattern of a plug, slug annular, and annular and significantly affect the flow pattern of churn. This significant influence occurs because the variation in the mixture of water and oil emulsions greatly affects the difference in viscosity of liquids, namely 130.00 Cp and 161.66 Cp, thus affecting the type of flow pattern. In this study, a bubbly flow pattern was not found. This case was due to the absence of laminar to turbulent transitions because higher oil concentrations resulted in lower Reynolds values.

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“…Consequently, this study is centered on the examination of mobile porosity, which serves as the conduit for fluid flow within the GCL. Accordingly, the numerical model in this study focuses solely on mobile porosity [21,22], which facilitates the flow of free water between the granules [23]. Furthermore, due to the Reynolds number (Re) being notably below 1 in the GCL [24][25][26], creeping flow was selected as the fluid flow model for all simulations.…”

Section: Hydraulic Model Of Gclsmentioning

confidence: 99%

Numerical Investigation of Confining Pressure Effects on Microscopic Structure and Hydraulic Conductivity of Geosynthetic Clay Liners

Hou,

Sun,

Chu

et al. 2024

Processes

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A series of COMSOL numerical models were developed to explore how confining pressure impacts the microscopic structure and hydraulic conductivity of Geosynthetic Clay Liners (GCLs), taking into account the bentonite swelling ratio, mobile porosity, pore size, and tortuosity of the main flow path. The study reveals that the mobile porosity and pore size are critical factors affecting GCL hydraulic conductivity. As confining pressure increases, the transition of mobile water to immobile water occurs, resulting in a reduction in mobile water volume, the narrowing of pore channels, decreased flow velocity, and diminished hydraulic conductivity within the GCL. Mobile porosity undergoes a slight decrease from 0.273 to 0.104, while the ratio of mobile porosity to total porosity in the swelling process decreases significantly from 0.672 to 0.256 across the confining pressure range from 50 kPa to 500 kPa, which indicates a transition of mobile water toward immobile water. The tortuosity of the main flow path shows a slight increase, fluctuating within the range of 1.30 to 1.36, and maintains a value of around 1.34 as the confining pressure rises from 50 kPa to 500 kPa. At 50 kPa confining pressure, the minimum pore width measures 5.2 × 10−5 mm, with a corresponding hydraulic conductivity of 6.2 × 10−11 m/s. With an increase in confining pressure to 300 kPa, this compression leads to a narrower minimum pore width of 1.81 × 10−5 mm and a decrease in hydraulic conductivity to 5.11 × 10−12 m/s. The six-fold increase in confining pressure reduces hydraulic conductivity by one order of magnitude. A theoretical equation was derived to compute the hydraulic conductivity of GCLs under diverse confining pressure conditions, indicating a linear correlation between the logarithm of hydraulic conductivity and confining pressure, and exhibiting favorable agreement with experimental findings.

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An experimental investigation of oil-water flow in a serpentine channel

Cited by 25 publications

References 24 publications

A Review on the Hydrodynamics of the Liquid–Liquid Two-Phase Flow in the Microchannels

A Review on the Hydrodynamics of the Liquid–Liquid Two-Phase Flow in the Microchannels

Two-Phase Flow Patterns of Air – Water and Oil in Mini Channel Against Horizontal Position

Numerical Investigation of Confining Pressure Effects on Microscopic Structure and Hydraulic Conductivity of Geosynthetic Clay Liners

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