Flow of emulsion drops through a constricted microcapillary channel

Cunha, Lucas Hildebrand Pires da; Siqueira, Ivan R.; Albuquerque, Éder Lima de; Oliveira, Taygoara Felamingo de

doi:10.1016/j.ijmultiphaseflow.2018.02.015

Cited by 21 publications

(10 citation statements)

References 68 publications

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“…If the emulsion droplets are larger than the throat diameter and smaller than the pore diameter, then they easily pass through the pore and block the throat, which causes the reservoir permeability to decrease. If the pressure gradient increases or the interfacial tension decreases, then the emulsion droplets resume migration 100 . Therefore, for discontinuous emulsion flow, the fluid relative permeability is related to many factors, such as oil saturation, water saturation, pressure gradient, emulsion droplet size, and interfacial tension.…”

Section: Physical Simulation Of Crude Oil Emulsion Flow During Chemic...mentioning

confidence: 99%

“…If the pressure gradient increases or the interfacial tension decreases, then the emulsion droplets resume migration. 100 Therefore, for discontinuous emulsion flow, the fluid relative permeability is related to many factors, such as oil saturation, water saturation, pressure gradient, emulsion droplet size, and interfacial tension. These factors affect the morphology and quantity of emulsion droplets trapped in porous media.…”

Section: Physical Simulation Of Microscopic Seepagementioning

confidence: 99%

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A review of crude oil emulsification and multiphase flows in chemical flooding

Yazhou

Yin

et al. 2022

Energy Science & Engineering

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Chemical flooding has become an important method to enhance oil recovery in high‐water cut reservoirs. Crude oil emulsification often occurs during chemical flooding, and it plays a very positive role in increasing crude oil production. Crude oil emulsification increases the complexity of fluid flow in the reservoir including multifield coupling characteristics and multiphase flow and multiphase form characteristics. This paper discusses advanced research techniques and the status of multiphase fluid flows in chemical flooding, including the interfacial rheological properties of emulsions, physical simulation of emulsion seepage, and mathematical models and numerical simulations of seepage. Studies on the mechanism of seepage have analyzed the macroscopic and microscopic aspects of seepage during chemical flooding. Prospective directions for future research are indicated including the study of the interfacial rheological characteristics of emulsions, methods for the evaluation of the seepage characteristics of chemical flooding, and mathematical models of multiphase seepage during chemical flooding.

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Section: Physical Simulation Of Crude Oil Emulsion Flow During Chemic...mentioning

confidence: 99%

Section: Physical Simulation Of Microscopic Seepagementioning

confidence: 99%

A review of crude oil emulsification and multiphase flows in chemical flooding

Yazhou

Yin

et al. 2022

Energy Science & Engineering

View full text Add to dashboard Cite

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“…2017; Cunha et al. 2018 a ; De Siqueira et al. 2018) and an asymptotic solution based on the small deformation theory (Vlahovska, Bławzdziewicz & Loewenberg 2009), reported a rheological study on droplets of moderate to high viscosity ratios subjected to oscillatory shear flows, showing that the system dynamics depends on the shear rate, oscillation frequency and droplet relaxation time.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to the large amplitude oscillatory shear cases, the nature of droplet oscillation angle does not change as the frequency increases (Guido, Grosso & Maffettone 2004). Oliveira & Cunha (2015), using the boundary integral method (Siqueira et al 2017;Cunha et al 2018a;De Siqueira et al 2018) and an asymptotic solution based on the small deformation theory (Vlahovska, Bławzdziewicz & Loewenberg 2009), reported a rheological study on droplets of moderate to high viscosity ratios subjected to oscillatory shear flows, showing that the system dynamics depends on the shear rate, oscillation frequency and droplet relaxation time. They observed that, for a dilute emulsion, large oscillation amplitudes might lead to non-harmonic responses of the shear stresses and nonlinear behaviours.…”

Section: Introductionmentioning

confidence: 99%

On the rheology and magnetization of dilute magnetic emulsions under small amplitude oscillatory shear

et al. 2023

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A dilute magnetic emulsion under the combined action of a uniform external magnetic field and a small amplitude oscillatory shear is studied using numerical simulations. We consider a three-dimensional domain with a single ferrofluid droplet suspended in a non-magnetizable Newtonian fluid. We present results of droplet shape and orientation, viscoelastic functions and bulk emulsion magnetization as functions of the shear oscillation frequency, magnetic field intensity and orientation. We also investigate how the magnetic field induces mechanical anisotropy by producing internal torques in oscillatory conditions. We found that, when the magnetic field is parallel to the shear plane, the droplet shape is mostly independent of the shear oscillation frequency. Regarding the viscometric functions, we show how the external magnetic field modifies the storage and loss moduli, especially for a field aligned to the main velocity gradient. The bulk emulsion magnetization is studied in the same fashion as the viscoelastic functions of the oscillatory shear. We show that the in-phase component of the magnetization with respect to the shear rate reaches a saturation magnetization, at the high frequencies limit, dependent on the magnetic field intensity and orientation. On the other hand, we found a non-zero out-of-phase response, which indicates a finite emulsion magnetization relaxation time. Our results indicate that the magnetization relaxation is closely related to the mechanical relaxation for dilute magnetic emulsions under oscillatory shear.

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“…However, by penetrating the structure and analyzing the transport of individual emulsion droplets in individual pores or capillaries, valuable information can be obtained that will find its application, among others, in medicine or the pharmaceutical and cosmetic industry. In the literature on the subject, there are several works (Shui et al 2007;Perazzo et al 2018;Liu et al 2018;Cunha et al 2018;Harvie et al 2008) relating to the movement of individual droplets through a capillary. They provide valuable information on the flow resistance of these droplets, their deformation during movement or decay.…”

Section: Introductionmentioning

confidence: 99%

Analysis of droplet displacement during transport of polydisperse emulsion as drug carriers in microchannels

Błaszczyk

Sęk

Przybysz

2022

Microfluid Nanofluid

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Drug transport in human body is often intensified by various carriers. The simplest and highly effective are emulsions. In these liquids, one phase is dispersed in other in the form of droplets, in which active substance is often dissolved. In existing application of such liquids as carriers, monodispersity of such systems has been a very important parameter, because when all droplets have same size, it is relatively easy to predict drug release time. However, monodisperse emulsion production on an industrial scale is expensive and technologically quite difficult. Therefore, it would be more reasonable to use polydisperse emulsions. However, mechanism of drug release from such carriers is more complicated and difficult to conduct. When emulsion droplets of different sizes pass through microchannels, i.e., blood vessels, individual droplets’ transport velocity is different and interdependent. The ability to predict rate at which individual droplets travel through microchannels will enable control of drug release depending on emulsion parameters. This work presents a detailed analysis of polydisperse emulsion transport through a single microchannel. Dependence of individual droplets velocity on their diameter and position relative to flow axis and influence of these parameters on droplet transport trajectories were studied. These studies were conducted for five liquid flow rates and three emulsion concentrations. As a result of this work, some generalization approach was proposed to estimate droplet transport velocity depending on their position in channel based on reference to single-phase flow. This work may find application in pharmaceutical industry for design of cheaper drug manufacturing technologies. Graphical abstract

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Flow of emulsion drops through a constricted microcapillary channel

Cited by 21 publications

References 68 publications

A review of crude oil emulsification and multiphase flows in chemical flooding

A review of crude oil emulsification and multiphase flows in chemical flooding

On the rheology and magnetization of dilute magnetic emulsions under small amplitude oscillatory shear

Analysis of droplet displacement during transport of polydisperse emulsion as drug carriers in microchannels

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