Dynamic blocking of W/O emulsion in a radially expanding flow in Hele-Shaw cell

2006 ◽  
Vol 4 ◽  
pp. 200-206
Author(s):  
A.A. Rakhimov ◽  
A.K. Akhmetov
Keyword(s):  
Pressure Drop ◽  
Capillary Channel ◽  
Oil Emulsion ◽  
Ultrasonic Fields ◽  
Emulsion Flow ◽  
Dynamic Blocking ◽  
Hele Shaw Cell

It is studied the changing of structure of the radial expanding flow of highly concentrated stable reverse water-oil emulsion in a flat capillary channel. The effect of dynamic blocking is discovered, which is that despite the permanent pressure drop between the center and outer forming cells, the emulsion flow with time stands still. Microflows are shown in a state of ”blocking“. The various methods of influencing the system in a state of ”blocking“ are tested. It is found that the movement is resumed in a strong ultrasonic fields.

Pressure Drop Reduction of Stable Water-in-Oil Emulsion Flow: Role of Water Fraction and Pipe Diameter

2013 ◽  
Author(s):  
M. Al-Yaari ◽  
A. Al-Sarkhi ◽  
I. Hussein ◽  
M. Abbad ◽  
F. Chang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Pipe Diameter ◽  
Oil Emulsion ◽  
Water Fraction ◽  
Emulsion Flow ◽  
Water In Oil Emulsion

Features of the flow of dispersions liquid-liquid type through a cylindrical microchannel

2010 ◽  
Vol 7 ◽  
pp. 60-71
Author(s):  
A.T. Akhmetov ◽  
S.P. Sametov
Keyword(s):  
High Pressure ◽  
Pressure Drop ◽  
Physical Mechanism ◽  
Blocking Effect ◽  
Pressure Gradients ◽  
Emulsion Flow ◽  
Flow Through ◽  
Dynamic Blocking ◽  
Liquid Type ◽  
Cylindrical Microchannel

A surprising property of W/O water-hydrocarbon emulsions is revealed which is manifested during flow in microchannels called the phenomenon of dynamic blocking. Effect essence is emulsion flow through the microchannel section ceases with time despite the constantly acting pressure drop. It was experimentally obtained that the phenomenon is observed during the flow of various emulsions of different compositions. It is shown that the phenomenon manifests itself at high pressure gradients although a partial disruption of the dispersions occurs. The paper suggests a physical mechanism for blocking water-hydrocarbon emulsions in microchannels associated with the interaction of nanoscale shells of microdroplets of water.

Dynamic blocking phenomenon at a flow of stabled highly concentrated W/O emulsions

2006 ◽  
Vol 4 ◽  
pp. 117-134
Author(s):  
A.T. Akhmetov ◽  
V.V. Glukhov ◽  
M.V. Mavletov ◽  
A.G. Thelin
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Experimental Study ◽  
Oil Emulsion ◽  
Cylindrical Tubes ◽  
Dynamic Blocking ◽  
Hele Shaw Cell ◽  
Comparison With Experimental Data

There are experimental study of flows of reverse highly concentrated water-oil emulsion in the Hele-Shaw cell and cylindrical tubes of various diameters. There are structures are given from the flat flows and the behaviour of the emulsion in flat and cylindrical systems in a state of ”dynamic blocking“. A mathematical model for its description and a comparison with experimental data is offered.

Pressure Drop Reduction of Stable Water-in-Oil Emulsion Flow: Role of Water Fraction and Pipe Diameter

2013 ◽  
Author(s):  
M. Al-Yaari ◽  
A. Al-Sarkhi ◽  
I. Hussein ◽  
M. Abbad ◽  
F. Chang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Pipe Diameter ◽  
Oil Emulsion ◽  
Water Fraction ◽  
Emulsion Flow ◽  
Water In Oil Emulsion

Performance of Electrostatic Field in Continuous Demulsification of Simulated Crude Oil Emulsion

2015 ◽  
Vol 74 (7) ◽  
Author(s):  
Norasikin Othman ◽  
Tan Kah Sin ◽  
Norul Fatiha Mohamed Noah ◽  
Ooi Zing Yi ◽  
Norela Jusoh ◽  
...  
Keyword(s):  
Crude Oil ◽  
Flow Rate ◽  
Oil Quality ◽  
Market Price ◽  
Process Equipment ◽  
Electrical Method ◽  
Oil Emulsion ◽  
Emulsion Flow ◽  
Span 80 ◽  
Phase Water

Water-in-oil (W/O) emulsion is always formed in crude oil production. In most cases, the presence of water droplets in crude oil is undesirable because they can cause several problems such as corrosion of process equipment and a decrease in crude oil quality, as well as its market price. In this research, a simulated W/O emulsion that consists of kerosene as a continuous oil phase, water as a dispersed phase and SPAN 80 as an emulsifier has been formulated. The feasibility of using Span 80 for W/O emulsion formation and emulsion stability has been investigated. Stability test proved that the emulsions with 2 w/v % of Span 80 were stable and no separation was observed for the first 48 hours of gravitational settling. Besides, this research also aimed to study the effects of several parameters such as frequency, emulsion flow rate, voltage, water content in emulsion, and emulsifier concentration on the demulsification performance under high voltage electric field. The results showed that the best demulsification performance was 90% using electrical method at 1000 Hz of frequency, 10kV of voltage, 0.4 mL/s of emulsion flow rate, 2 w/v % of emulsifier, and 30 % of water portion of simulated crude oil.

Effect of Water Fraction on Surfactant Stabilized Water-in-Oil Emulsion Flow Characteristics

2013 ◽  
Author(s):  
M. Al-Yaari ◽  
I. Hussein ◽  
A. Al-Sarkhi ◽  
M. Abbad ◽  
F. Chang ◽  
...  
Keyword(s):  
Flow Characteristics ◽  
Oil Emulsion ◽  
Water Fraction ◽  
Effect Of Water ◽  
Emulsion Flow ◽  
Water In Oil Emulsion

scholarly journals MODELING THE BEHAVIOR OF THE OIL EMULSION FLOW IN THE CHANNEL OF THE IN-TUBE SPIRAL TURBULATOR

2020 ◽  
Vol 18 (6) ◽  
pp. 116
Author(s):  
S.A. Kinev ◽  
D.F. Khanov ◽  
A.O. Borisov
Keyword(s):  
Oil Emulsion ◽  
Emulsion Flow

Dynamic blocking and dispersions rheology at phase transition

2011 ◽  
Vol 8 (1) ◽  
pp. 77-91
Author(s):  
A.T. Akhmetov ◽  
M.V. Mavletov ◽  
A.A. Valiev
Keyword(s):  
Phase Transition ◽  
Pressure Drop ◽  
Rheological Properties ◽  
Chemical Compounds ◽  
Blocking Effect ◽  
Dispersed Phase ◽  
Simple Chemical ◽  
Dynamic Blocking ◽  
The Difference

In the flow in the microchannel of reverse water hydrocarbon emulsions, it is found the dynamic blocking effect. The essence of the effect is that the flow of the emulsion through the section of the microchannel stops with time, despite the permanent pressure drop. The difference of this work from previous ones is that for the experiments was prepared the emulsion of simple chemical compounds. For visualization of the structure formed in the capillary after blocking, the dispersed phase was introduced fluorescing component. It is studied and compared the rheological properties of the emulsion and formed from it in the phase transition suspension.

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