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.

Research of the thermal convection influence on the process of water-in-oil emulsion stratification

2017 ◽  
Vol 12 (2) ◽  
pp. 163-168
Author(s):  
R.R. Iulmukhametova ◽  
E.R. Tukhbatova ◽  
A.A. Musin ◽  
L.A. Kovaleva
Keyword(s):  
Thermal Convection ◽  
Control Volume ◽  
Boussinesq Approximation ◽  
Effect Of Temperature ◽  
Oil Emulsion ◽  
Convective Flows ◽  
Gravitational Forces ◽  
Volume Method ◽  
Water In Oil Emulsion ◽  
The Mathematical Model

The results of numerical modeling of the effect of temperature on the dynamics of the water droplets’ sedimentation in a water-in-oil emulsion in the field of gravitational forces are presented in the article. The mathematical model is based on the system of equations of thermal convection in the Boussinesq approximation with the addition of the diffusion equation. The simulation was carried out in the open software platform OpenFOAM by the control volume method. Numerical calculations take into account the thermal convection of the emulsion system. It is shown that the convective flows arising in the liquid affect the process of stratification of the water-in-oil emulsion. To estimate the simulation results dimensionless parameters of Rayleigh and Archimedes were introduced.

scholarly journals INJECTION OF WATER-IN-OIL EMULSION JETS INTO A SUBSONIC CROSSFLOW: AN EXPERIMENTAL STUDY

2014 ◽  
Vol 24 (4) ◽  
pp. 303-348 ◽  
Author(s):  
Christopher D. Bolszo ◽  
Vincent G. McDonell ◽  
Guillermo A. Gomez ◽  
G. Scott Samuelsen
Keyword(s):  
Experimental Study ◽  
Oil Emulsion ◽  
Subsonic Crossflow ◽  
Water In Oil Emulsion

Experimental study on EOR potential of water-in-oil emulsion via CO2/N2 triggered wormlike micelle solution

Fuel ◽  
2021 ◽  
Vol 288 ◽  
pp. 119639
Author(s):  
Dai-jun Du ◽  
Wan-fen Pu ◽  
Bo-wen Chen ◽  
Mikhail A. Varfolomeev ◽  
Rui Liu
Keyword(s):  
Experimental Study ◽  
Oil Emulsion ◽  
Wormlike Micelle ◽  
Micelle Solution ◽  
Water In Oil Emulsion

Thermal Convection and Dispersion in Folded Gaps Embedded in Impervious Rocks

Volume 1 ◽  
2004 ◽  
Author(s):  
F. Sa´nchez ◽  
A. Medina ◽  
J. L. Montan˜es
Keyword(s):  
Experimental Study ◽  
Aspect Ratio ◽  
Thermal Convection ◽  
Taylor Dispersion ◽  
Vertical Temperature Gradient ◽  
Small Aspect Ratio ◽  
Dispersive Transport ◽  
Vertical Temperature ◽  
Convective Flows ◽  
Saturated Porous Layer

It is presented a numerical and experimental study related to thermal convection and Taylor dispersion in a symmetrical folded gap of small aspect ratio. The gap is surrounded by an impervious rock which is affected by a constant vertical temperature gradient. Two cases were analyzed, the fluid-filled gap and the fluid-saturated porous layer. Their corresponding convective flows were calculated for small Rayleigh number regimes. Taylor dispersion of a passive contaminant, in both cases, was studied. It was found that dispersion is strongly limited by the convective flows. Indeed, the Peclet number and the gap aspect ratio seem to be tight related to an eventually limited dispersive transport rate.

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.

Deemulsification of Water-in-Oil Emulsion with Sludges

1987 ◽  
Vol 22 (3) ◽  
pp. 437-443 ◽  
Author(s):  
N. Kosaric ◽  
Z. Duvnjak
Keyword(s):  
Activated Sludge ◽  
Room Temperature ◽  
Petroleum Refinery ◽  
Treatment Plant ◽  
Granular Sludge ◽  
Activated Sludge Process ◽  
Sludge Treatment ◽  
Oil Emulsion ◽  
Water In Oil Emulsion ◽  
Aerobic Sludge

Abstract Aerobic sludge from a municipal activated sludge treatment plant, sludge from a conventional municipal anaerobic digester, aerobic sludge from an activated sludge process of a petroleum refinery, and granular sludge from an upflow sludge blanket reactor (USBR) were tested in the deemulsification of a water-in-oil emulsion. All sludges except the last one, showed a good deemulsification capability and could he used for a partial deemulsification of such emulsions. The rate and degree of the deemulsifications increased with an increase in sludge concentrations. The deemulsifications were faster at 85°C and required smaller amounts of sludge than in the case of the deemulsifications at room temperature. An extended stirring (up to a certain limit) in the course of the dispersion of sludge emulsion helped the deemulsification. Too vigorous agitation had an adverse effect. The deemulsification effect of sludge became less visible with an increase in the dilution of emulsion which caused an increase in its spontaneous deemulsification.

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.

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