Numerical Study of Emulsion Droplet in Electromagnetic Field

2012 ◽  
Author(s):  
Liana Kovaleva ◽  
Ayrat Musin ◽  
Yulia Fatkhullina ◽  
Yuriy Zamula ◽  
Rasul Zinnatullin ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Numerical Solution ◽  
Electromagnetic Fields ◽  
Numerical Study ◽  
Experimental Studies ◽  
Emulsion Droplet ◽  
Droplet Dynamics ◽  
Oil Emulsion ◽  
Oil Emulsions ◽  
Water In Oil Emulsion

Some results of experimental studies of the water-in-oil emulsions in RF and MW electromagnetic fields are presented. In an attempt to understand the phenomenon a mathematical model for a single emulsion droplet dynamics in radio frequency (RF) and microwave (MW) electromagnetic fields is formulated. An algorithm for numerical solution of the problem is developed. The problem is solved accounting for the thermal motion induced by electromagnetic field in the fluid within the water droplet and in the surrounding liquid. The numerical solution revealed that the structures of arising convective flows induced by RF and MW electromagnetic fields are different. The results can help to understand the physical mechanisms of water-in-oil emulsion destruction in electromagnetic field.

Destruction of water-in-oil emulsions in electromagnetic fields in a dynamic mode

2012 ◽  
Vol 9 (1) ◽  
pp. 110-115
Author(s):  
L.A. Kovaleva ◽  
R.R. Zinnatullin ◽  
V.N. Blagochinnov ◽  
A.A. Musin ◽  
Yu.I. Fatkhullina ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Radio Frequency ◽  
Electromagnetic Fields ◽  
Dynamic Mode ◽  
Droplet Dynamics ◽  
Oil Emulsion ◽  
Numerical Studies ◽  
Em Field ◽  
Oil Emulsions ◽  
Water In Oil Emulsion

Some results of experimental and numerical studies of the influence of radio-frequency (RF) and microwave (MW) electromagnetic (EM) fields on water-in-oil emulsions are presented. A detailed investigation of the dependence of the dielectric properties of emulsions on the frequency of the field makes it possible to establish the most effective frequency range of the EM influence. The results of water-in-oil emulsion stability in the RF EM field depending on their dielectric properties are presented. The effect of the MW EM field on the emulsion in a dynamic mode has been studied experimentally. In an attempt to understand the mechanism of emulsion destruction the mathematical model for a single emulsion droplet dynamics in radio-frequency (RF) and microwave (MW) electromagnetic fields is formulated.

Destruction of Water-in-Oil Emulsions in Electromagnetic Fields

2011 ◽  
Author(s):  
Liana Kovaleva ◽  
Ayrat Musin ◽  
Rasul Zinnatullin ◽  
Iskander S. Akhatov
Keyword(s):  
Electromagnetic Fields ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Field Energy ◽  
Gas Industry ◽  
Oil Emulsion ◽  
Polar Components ◽  
Oil Emulsions ◽  
Stability Of Water ◽  
Water In Oil Emulsion

The problem of water-in-oil emulsion destruction is related to many technological processes in the oil-and-gas industry, especially in extracting and processing of oil, preparation and transportation of oil, and liquidation/recycling of oil-sludge barns. High stability of water-in-oil emulsions is principally conditioned by the presence in oils of heavy high-molecular polar components that envelope water droplets and prevent coalescence of these droplets. Using conventional techniques to destroy the emulsions yields no positive results. Employing electromagnetic field energy is one of the ways to address this problem. The paper presents the results of an experimental study of the water-in-oil emulsion destruction in radio-frequency and microwave electromagnetic fields. A mathematical model is also proposed to describe the process of electromagnetic impact on water-in-oil emulsions.

scholarly journals Experimental study of the stratification of polydisperse emulsions in a cell with heated walls

2021 ◽  
Vol 2057 (1) ◽  
pp. 012041
Author(s):  
V I Valiullina ◽  
A I Mullayanov ◽  
A A Musin ◽  
L A Kovaleva
Keyword(s):  
Experimental Study ◽  
Deposition Rate ◽  
Thermal Convection ◽  
Dispersion Medium ◽  
Experimental Studies ◽  
Oil Emulsion ◽  
Convective Flows ◽  
A Cell ◽  
Increasing Temperature ◽  
Water In Oil Emulsion

Abstract Experimental studies of the gravitational deposition of a polydisperse water-in-oil emulsion under heat influence are carried out. When the rate of thermal convection exceeds the rate of precipitation, partial delamination of the emulsion is found to occur. The viscosity of the dispersion medium decreases with increasing temperature, which contributes to an increase in the deposition rate of water droplets in the emulsion. In the presence of a temperature difference, convective flows occur in the liquid, while the drops of the emulsion coagulate and form larger agglomerates that settle faster to the bottom of the cell.

scholarly journals The impact of different types of wave action on the destruction of stable gel-containing water-oil emulsions

2018 ◽  
Vol 84 (7) ◽  
pp. 7-15
Author(s):  
Yu. N. Romanova ◽  
N. S. Musina ◽  
T. A. Maryutina
Keyword(s):  
Electromagnetic Field ◽  
Original Method ◽  
Complete Separation ◽  
Wave Action ◽  
Permanent Magnetic Field ◽  
Oil Emulsion ◽  
Real Samples ◽  
Different Types ◽  
Oil Emulsions ◽  
The Impact

An original method of wave sample preparation of commercial stable gel-containing water-oil emulsions is developed to separate water and oil phases present in the composition for their subsequent analysis. Real samples of commercial stable water-oil emulsions, differing in composition (water content, «gel», iron sulphide and mechanical impurities) are studied. The effect of the intensity and duration of the wave action of different nature on the completeness of phase separation in the real samples of commercial emulsions of different composition are studied. A possibility in principal of isolating oil and water phases from the composition of stable water-oil emulsions stabilized by gel-like associates under wave action (magnetostatic and electromagnetic field, ultrasonic vibrations) is shown. When the water-oil emulsion is exposed to a permanent magnetic field with an induction range of 0.1 – 0.57 T for 1 – 3 minutes, the degree of water isolation from the emulsion samples under study varies from 48 % to 71 %, depending on the composition of the emulsion under study. Similar results are obtained under the effect of electromagnetic field with an induction of 0.1 – 1.0 T. For complete separation of water and oil phases from gel-containing water-oil emulsions, we proposed to use ultrasonic treatment combined with addition of a suspension prepared from aluminum oxide nanopowder in acetonitrile which provide complete destruction of «gel» and 100 % separation of water and oil phases.

Under-oil superhydrophilic salt particle filter for the efficient separation of water-in-oil emulsions

2020 ◽  
Vol 56 (78) ◽  
pp. 11585-11588
Author(s):  
Bao Wang ◽  
Awais Mahmood ◽  
Lei Chen ◽  
Ding Weng ◽  
Caihua Wang ◽  
...  
Keyword(s):  
Particle Filter ◽  
Oil Emulsion ◽  
Salt Particle ◽  
Efficient Separation ◽  
Oil Emulsions ◽  
Water In Oil Emulsion

In this study, a surfactant stabilized water-in-oil emulsion has been successfully separated by using only NaCl particles as a filter.

MONITORING SYSTEM TO ENSURE THE ELECTROMAGNETIC SAFETY OF HOUSEHOLD OBJECTS

2020 ◽  
Author(s):  
Е.В. ТИТОВ
Keyword(s):  
Electromagnetic Field ◽  
Field Strength ◽  
Electric Field ◽  
Electromagnetic Radiation ◽  
Electromagnetic Fields ◽  
Personal Computer ◽  
Experimental Studies ◽  
Electromagnetic Environment ◽  
Stay Time ◽  
Computer Monitors

Предложен метод формирования картин опасности электромагнитных излучений в ограниченном пространстве с источниками электромагнитных полей по критерию допустимого времени пребывания людей. Представлены результаты экспериментальных исследований опасности электромагнитного поля от мониторов персональных компьютеров, оптических манипуляторов типа «мышь» и многофункциональных устройств типа «принтер-копир-сканер». Приведены компьютерные модели электромагнитной обстановки в виде картин распределения напряженности электрического поля на частоте 30 кГц, а также в виде картин опасности электромагнитных излучений по критерию допустимого времени. It is proposed the method of forming pictures of the danger of electromagnetic radiation in a limited space with sources of electromagnetic fields according to the criterion of the allowable stay time. The article shows the results of experimental studies of the electromagnetic field from personal computer monitors, optical mice, and multifunctional devices printer-copier-scanner. Computer models of the electromagnetic environment are presented in the form of pictures of the distribution of the electric field strength at a frequency of 30 kHz

New Models for Water-in-Oil Emulsion Formation

2014 ◽  
Vol 2014 (1) ◽  
pp. 285469 ◽  
Author(s):  
Merv Fingas
Keyword(s):  
Regression Models ◽  
Stability Index ◽  
Data Set ◽  
Oil Emulsion ◽  
New Model ◽  
Physical Knowledge ◽  
New Models ◽  
Oil Mixtures ◽  
Oil Emulsions ◽  
Water In Oil Emulsion

Research has shown that asphaltenes are the prime stabilizers of water-in-oil emulsions and that resins are necessary to solvate the asphaltenes. Research has also shown that many compositional factors play a role including the amount of saturates and the properties of viscosity and density. These factors can then be used to develop models of emulsion formation. A review of the formation processes of these emulsions and water and oil types is given. This applies to all four water-in-oil types: stable, meso-stable, unstable emulsions and entrained water. The differences among these four types are high-lighted. A number of other techniques have also been used to model emulsions including neural networks. These are noted and compared to the regression models. A data set of more than 400 oils and their water-in-oil mixtures are used for the comparison. Numerical modeling schemes for the formation of water-in-oil emulsions are reviewed. New models are based on empirical data and the corresponding physical knowledge of emulsion formation. The density, viscosity, asphaltene and resin contents were correlated with a stability index. The establishment of an index for emulsion stability enables the use of this value as a target for the optimization of regressions to form a new model. The predictions of the new model are much simpler and better than old models and some that have been in the literature for some time. The new model is more accurate than the old models, although some improvement could still be made. The benefit of the new model is that it is more accurate and simpler than former regression models. The different approaches to these models and older regression models are highlighted.

HOW TO MODEL WATER-IN-OIL EMULSION FORMATION

2005 ◽  
Vol 2005 (1) ◽  
pp. 647-654
Author(s):  
Merv Fingas ◽  
Ben Fieldhouse
Keyword(s):  
Complex Modulus ◽  
Stable Emulsion ◽  
Oil Emulsion ◽  
Visual Appearance ◽  
Physical Knowledge ◽  
Prediction Scheme ◽  
Oil Mixtures ◽  
Oil Emulsions ◽  
Water In Oil Emulsion ◽  
Model Water

ABSTRACT Water-in-oil mixtures were grouped into four states or classes: stable, mesostable, unstable, and entrained water. Only stable and mesostable states can be characterized as emulsions. These states were established according to lifetime, visual appearance, complex modulus, and differences in viscosity. Water-in-oil emulsions made from crude oils have different classes of stability as a result of the asp haltene and resin contents, as well as differences in the viscosity of the starting oil. In this paper a new numerical modelling scheme is proposed and is based on empirical data and the corresponding physical knowledge of emulsion formation. The density, viscosity, saturate, asphaltene and resin contents are used to compute a class index which yields either an unstable or entrained water-in-oil state or a meso-stable or stable emulsion. A prediction scheme is given to estimate the water content and viscosity of the resulting water-in-oil state and the time to formation with input of wave-height.

scholarly journals Malaysian Crude Oil Emulsions : Stability Study

REAKTOR ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 29
Author(s):  
B. Pramudono ◽  
H. B. Mat
Keyword(s):  
Crude Oil ◽  
Emulsion Stability ◽  
Stability Study ◽  
Active Components ◽  
Oil Emulsion ◽  
Result Show ◽  
Oil Emulsions ◽  
The Stability ◽  
Stability Of Water ◽  
Water In Oil Emulsion

The stability of water-in-oil emulsion of some Malaysian crude oils was studied with particular emphasis on effect of interfacial active components existed in the crude oil, i.e. asphaltene, resin and wax. The emulsion stability was studied by measuring the volume of water or oil phase separated in variation with time, water hold up, and the heights of the sedimenting/coalescing interfaces during the separation at various temperatures. The study investigated the influence of asphaltene, resin and wax on emultion stability if it`s present in the crude oil alone, together or combination one of the others. The result show that the interfacial active component that stabilize emulsion is asphaltene. The resin and wax  do not form stale emulsion either aloneor together. There is a correlation between emulsion stability and physicochemical properties of crude oil which showed that higher asphaltene content in the crude oil would form more stable emultion. Increased temperature was found to cause instability of emultion. Keywords : emultion stability, crude oil, asphaltene, resin and wax

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