An experimental investigation and two-fluid model validation for dilute viscous oil in water dispersed pipe flow

Picchi, Davide; Strazza, Domenico; Demori, Marco; Ferrari, Vittorio; Poesio, Pietro

doi:10.1016/j.expthermflusci.2014.07.016

Cited by 21 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The case of drop traffic flow will not be addressed here due to the absence, to the best of our knowledge, of specific closures to model drag of a viscous drop flowing in a microchannel. Such closures exist in the context of bubbly flow at large Eotvos number (Cazarez et al, ; Picchi, Strazza, et al, ), where drops (or bubbles) have an average size much smaller than the pipe diameter. Since the phase topology at large Eotvos numbers is significantly different from the case investigated here (where the size of the bubbles is comparable to that of the channel), large Eotvos number closures cannot be directly applied to flow in microchannels.…”

Section: Impact Of Pore‐scale Flow Regimes On the Upscaled Equationmentioning

confidence: 99%

The Impact of Pore‐Scale Flow Regimes on Upscaling of Immiscible Two‐Phase Flow in Porous Media

Picchi

Battiato

2018

Water Resources Research

View full text Add to dashboard Cite

Empirical or theoretical extensions of Darcy's law for immiscible two‐phase flow have shown significant limitations in properly modeling the flow at the continuum scale. We tackle this problem by proposing a set of upscaled equations based on pore‐scale flow regimes, that is, the topology of flowing phases. The incompressible Navier‐Stokes equation is upscaled by means of multiple‐scale expansions and its closures derived from the mechanical energy balance for different flow regimes at the pore scale. We also derive the applicability conditions of the upscaled equations based on the order of magnitude of relevant dimensionless numbers, that is, Eotvos, Reynolds, capillary, Froude numbers, and the viscosity and density ratio of the system, as well as a set of closures valid for the basic flow regimes of low Eotvos number systems, that is, core‐annular and plug and drop traffic flows. We provide analytical expressions for the relative permeability of the wetting and nonwetting phases in different flow regimes and demonstrate that the effect of the flowing‐phases topology on the relative permeabilities is significant. Finally, we show that the classical two‐phase Darcy law is recovered for a limited range of operative conditions, while specific terms accounting for interfacial and wall interactions should be incorporated to accurately model ganglia or drop traffic flow.

show abstract

Section: Impact Of Pore‐scale Flow Regimes On the Upscaled Equationmentioning

confidence: 99%

The Impact of Pore‐Scale Flow Regimes on Upscaling of Immiscible Two‐Phase Flow in Porous Media

Picchi

Battiato

2018

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…Computational Fluid Dynamic (CFD) is useful tools for optimization of process and equipment design in industrial oil. The simulation results of two-phase dispersed flow in a horizontal pipe are much infrequent in available literature (walvekar et al, 2009;Seaton et al, 2011Pouraria et al, 2013Picchi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamic Simulation of Dispersed Oil-Water Flow with New Drop Coalescence Model

Amooey

Amiri

2019

JAFM

View full text Add to dashboard Cite

The three-dimensional oil-water flow in horizontal pipe has been investigated by introducing population balance equation (PBE). The water fraction of inlet flow and mixture velocity varies from 46% to 60% and from1.25 m/s to 3m/s, respectively. The multiple size groups model has been applied to the non-uniform drop size distribution in oil-water flow. The drop coalescence models have a clear efficacy on the prediction capability of the PBE. In this work, drop coalescence model for oil-water is modified and used for predicting the phase distribution of dispersed oil-water in horizontal pipe. Population balance with modified Coulaloglou's frequency model is used. The attention of the modification is on the presence of droplets that reduce the free space for droplet motion and cause an enhancement in the collision frequency. The phase distribution profile from numerical results is presented and discussed. Acceptable agreement with the experimental data is achieved by using the modified coalescence model. Also, at 46% water fraction and mixture velocity equal as 3 m/s, model with population balance with modified Coulaloglou is 4% and 1% better than Luo's model and Coulaloglou's model, respectively.

show abstract

“…de Castro and Rodriguez (2015) found that the interfacial waves in stratified viscous oil-water flows could be correlated using the Reynolds, Froude and Weber dimensionless numbers. The interfacial wave characteristics can be used in the one-dimensional two-fluid model (Edomwonyi-Otu and Liu et al, 2015;Picchi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The nonlinear analysis of horizontal oil-water two-phase flow in a small diameter pipe

Zhai

Angeli

Jin

et al. 2017

International Journal of Multiphase Flow

View full text Add to dashboard Cite

Horizontal oil-water two-phase flows are frequently encountered in many industrial processes but the understanding of the dynamic behaviour underlying the different flow patterns is still a challenge. In this study, we first conduct experiments of horizontal oil-water flows in a small diameter pipe, and collect the fluctuation signals from conductance probes. The multiscale power-law correlations of the oil-water flow structures are investigated using Detrended Fluctuation Analysis (DFA) based on the magnitude and sign decomposition of the raw signals. The analysis reveals the scaling behaviour of different flow structures; five conductive flow patterns are indentified based on the magnitude and sign scaling exponents at different time scales. In addition, the transfer entropy (TE) in a state space is used to study the information transferring characteristics of the oil-water mixture flowing past a conductance crosscorrelation velocity probe. The results of TE indicate that the transferring information depends on the flow conditions and can be used to show changes in the flow patterns.

show abstract

An experimental investigation and two-fluid model validation for dilute viscous oil in water dispersed pipe flow

Cited by 21 publications

References 33 publications

The Impact of Pore‐Scale Flow Regimes on Upscaling of Immiscible Two‐Phase Flow in Porous Media

The Impact of Pore‐Scale Flow Regimes on Upscaling of Immiscible Two‐Phase Flow in Porous Media

Computational Fluid Dynamic Simulation of Dispersed Oil-Water Flow with New Drop Coalescence Model

The nonlinear analysis of horizontal oil-water two-phase flow in a small diameter pipe

Contact Info

Product

Resources

About