Liquid-Liquid Two-Phase Flow Systems

Brauner, Neima

doi:10.1007/978-3-7091-2538-0_5

Cited by 56 publications

(100 citation statements)

References 79 publications

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“…WENO discretizations use only one finite difference table regardless of the order of the scheme (Osher and Fedkiw, 2003). In addition, first-and second-order TVD-RungeKutta time subroutines are used for the temporal discretization of the time-dependent level-set equations (3) and (4). The basic idea behind the TVD-RK schemes is that increased accuracy in time can be achieved by taking linear combinations of the results of multiple first-order forward Euler steps with the initial data available at the beginning of the time step.…”

Section: Incorporation Of Various High Order Numerical Schemes In Thementioning

confidence: 99%

“…The mechanisms of droplet formation and their characteristic size are considered correlated to the hydrodynamic and transport phenomena in liquidliquid flows, in which the amount of available data on flow patterns is still small (Brauner, 1998). The numerical treatment of this subject through channels of complex geometry is quite new in the research field (Yap et al, 2006;Le, Khoo and Peraire, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Two-Phase Flows of Droplets in Contractions and Double Bends

Christafakis

Tsangaris

2008

Engineering Applications of Computational Fluid Mechanics

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Transient two-phase liquid-liquid flows of Newtonian fluid droplets in a primary Newtonian fluid with different viscosities, through constricted channels and double-bend channels, are numerically modelled and studied. The deformation and migration of various arrangements (arrays) of droplets, as they are carried by the primary phase into the low Reynolds number (Re), developing Hagen-Poiseuille laminar flow, is computed and discussed on the basis of the non-dimensional numbers: Capillary number (Ca), Reynolds number (Re), Weber number (We) and viscosity ratio (λ). The observations are well compared with the results of the literature. To predict the contours of droplets, we implement a level-set method (LSM) for capturing interfaces with high order WENO and TVD Runge-Kutta schemes. The LSM implicitly provides the conditions for the revised, nearly second-order, two-phase, time-dependent, 2-D Navier-Stokes momentum equations' solver, incorporating viscous and surface tension terms depending on the level-set function.

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Section: Incorporation Of Various High Order Numerical Schemes In Thementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-Phase Flows of Droplets in Contractions and Double Bends

Christafakis

Tsangaris

2008

Engineering Applications of Computational Fluid Mechanics

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“…In the light of a series of experimental tests performed at the University of Brescia, the validity of models developed and summarised by Brauner (2002) for the prediction of pressure drops in core-annular and oil-in-water dispersed flows, and for the prediction of flow regime regions in the flow-pattern map, will be analysed. The two liquids chosen for the experimental campaigns are paraffin oil and tap water which are characterised by an oil-to-water viscosity ratio of about 800:1 at 20°C.…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of theoretical models in two-phase high-viscosity ratio liquid–liquid flows in horizontal and slightly inclined pipes

Grassi

Strazza

Poesio

2008

International Journal of Multiphase Flow

117

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“…In the following study, to unify the definition of flow patterns in the literature, the flow patterns can be grouped into the following types: [12] Segregated flow, where two fluids flow in separate layers owing to different densities, including dual continuous flow (DC), stratified flow (ST), and stratified flow [6] 0.056…”

Section: Data Matrixmentioning

confidence: 99%

Characteristics of water holdup for oil and water mixture flows in horizontal, vertical, and inclined pipes

Liu

Zhang

et al. 2016

Can J Chem Eng

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In this work, the water holdup and slippage for oil and water mixture flows in horizontal, vertical, and inclined pipes have been investigated. A large group of experimental data was collected from 21 different sources covering the whole range of inclination angles from À908 to 908 to reveal the holdup characteristics and develop the drift velocity model. The results show that in horizontal flows the water holdup is dependent to the flow pattern, and yet in vertical flows the water holdup is similar to the input one and the flow direction shows a few influences on the holdup. In inclined flows, the Froude numbers are relatively independent of inclination angles when the angles are greater than 308. Therefore, the changes of water holdup in the pipe with small inclination angles are more severe than those with large inclination angles. In addition, a satisfactory agreement between predicted and experimental holdups substantiates the general validity of the proposed drift velocity correlation for oil and water flows, especially for those with large inclination angles.

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Liquid-Liquid Two-Phase Flow Systems

Cited by 56 publications

References 79 publications

Two-Phase Flows of Droplets in Contractions and Double Bends

Two-Phase Flows of Droplets in Contractions and Double Bends

Experimental validation of theoretical models in two-phase high-viscosity ratio liquid–liquid flows in horizontal and slightly inclined pipes

Characteristics of water holdup for oil and water mixture flows in horizontal, vertical, and inclined pipes

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