Rodlike Polymer Solution Flow through Fine Pores: Influence of Pore Size on Rheological Behavior

By using polymer solution with high viscosity, polymer flooding can enhance oil recovery by reducing the mobility ratio of displacing fluid and oil in formation. Therefore, the core of polymer flooding's ground transportation is to keep the viscosity of polymer solution unchanged. According to the process layout of polymer ground transportation, the experimental device was designed and manufactured to determine viscosity loss of pipelines and elbow. We obtained the viscosity loss variation law of the polymer solutions of different concentrations at different flow velocities when they flow through the pipeline and elbow. The experimental results showed that the viscosity of polymer solution will decrease after the polymer solution flow through pipelines and elbow, due to the shear effect. The higher the velocity, the more significant the viscosity loss.

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Concentration dependent changes of apparent slip in polymer solution flow

Journal of Rheology ◽

10.1122/1.550125 ◽

1990 ◽

Vol 34 (2) ◽

pp. 223-244 ◽

Cited By ~ 37

Author(s):

H. Müller‐Mohnssen ◽

D. Weiss ◽

A. Tippe

Keyword(s):

Polymer Solution ◽

Solution Flow ◽

Apparent Slip

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Drag Reducing Polymer in Helicoidal Flow

Journal of Fluids Engineering ◽

10.1115/1.3241757 ◽

1981 ◽

Vol 103 (4) ◽

pp. 491-496 ◽

Cited By ~ 2

Author(s):

J. T. Kuo ◽

L. S. G. Kovasznay

Keyword(s):

Drag Reduction ◽

Polymer Solution ◽

Ph Value ◽

Flow Behavior ◽

Superposition Principle ◽

Polymer Concentration ◽

Second Phase ◽

Additional Parameter ◽

Solution Flow ◽

Screw Pump

A novel flow configuration was explored for the study of the behavior of drag reducing polymers. A screw pump consisting of a smooth cylinder and a concentrically placed screw was used to create a strongly three-dimensional but essentially laminar flow. In the first phase of the study, the static pressure head developed by the screw pump was measured as a function of polymer concentration (polyox 10 to 100 ppm in water). A large increase of the developed head was observed that behaved in an analogous manner to drag reduction as far as concentration and straining of the polymer solution was concerned. In the second phase of the study, a new apparatus was constructed and the additional parameter of a superimposed through flow was included and the degree of failure of the superposition principle was established. Sensitivity of the phenomenon to chemicals like HCl, HNO3, and NaOH in the polymer solution was also studied. When the effect of these chemicals on the polymer solution flow behavior was presented in terms of the pH value of the polymer solution, it showed a similar trend to those observed in drag reduction.

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Novel Lightweight Metal Foam Heat Exchangers

10.1115/imece2001/pid-25616 ◽

2001 ◽

Author(s):

David P. Haack ◽

Kenneth R. Butcher ◽

T. Kim ◽

T. J. Lu

Keyword(s):

Heat Exchange ◽

Pore Size ◽

Heat Exchangers ◽

Metal Foam ◽

Heat Removal ◽

Random Orientation ◽

Flow Rates ◽

Small Pore ◽

Complex Heat Exchange ◽

Flow Through

Abstract An overview of open cell metal foam materials with application to advanced heat exchange devices is presented. The metal foam materials considered consist of interconnected cells in a random orientation. Metal foam materials, manufacture and fabrication into complex heat exchange components are described. Experiments with flat foam panels brazed to copper sheets shows increasing heat removal effectiveness with decreasing product pore size at equivalent coolant flow rates. However, the high-pressure drop associated with flow through small pore-size material makes the use of larger pore size material more attractive.

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Prediction of Fluid Flow in Artificial Cancellous Bone

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.695.393 ◽

2014 ◽

Vol 695 ◽

pp. 393-397

Author(s):

Elsa Syuhada Abdull Yamin ◽

Nor Azwadi Che Sidik

Keyword(s):

Fluid Flow ◽

Pore Size ◽

Surface Area ◽

Pore Diameter ◽

Bone Surface ◽

Flow Conditions ◽

Morphological Aspects ◽

Flow Through ◽

Structure Result ◽

Dynamics Method

The permeability of the blood in the artificial cancellous are affected by certain morphological aspects that include pore diameter, pore size, porosity and the bone surface area. In this study, computational fluid dynamics method is used to study the fluid flow through the cancellous structure. Result of the present work show that geometries with the same porosity and overall volume can have different permeability due to the differences in bone surface area. The hexahedron geometry has the highest permeability under stimulated blood flow conditions, where the cylindrical geometry has the lowest. Linear relationship is found between permeability and the two physical properties, bone surface area and the pore size.

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A FRACTAL MODEL FOR WATER FLOW THROUGH UNSATURATED POROUS ROCKS

Fractals ◽

10.1142/s0218348x18400157 ◽

2018 ◽

Vol 26 (02) ◽

pp. 1840015 ◽

Cited By ~ 37

Author(s):

BOQI XIAO ◽

XIAN ZHANG ◽

WEI WANG ◽

GONGBO LONG ◽

HANXIN CHEN ◽

...

Keyword(s):

Fractal Dimension ◽

Pore Size ◽

Capillary Pressure ◽

Water Flow ◽

Relative Permeability ◽

Fractal Model ◽

Water Phase ◽

Porous Rocks ◽

Proposed Model ◽

Flow Through

In this work, considering the effect of porosity, pore size, saturation of water and tortuosity fractal dimension, an analytical model for the capillary pressure and water relative permeability is derived in unsaturated porous rocks. Besides, the formulas of calculating the capillary pressure and water relative permeability are given by taking into account the fractal distribution of pore size and tortuosity of capillaries. It can be seen that the capillary pressure for water phase decreases with the increase of saturation in unsaturated porous rocks. It is found that the capillary pressure for water phase decreases as the tortuosity fractal dimension decreases. It is further seen that the capillary pressure for water phase increases with the decrease of porosity, and at low porosity, the capillary pressure increases sharply with the decrease of porosity. Besides, it can be observed that the water relative permeability increases with the increase of saturation in unsaturated porous rocks. This predicted the capillary pressure and water relative permeability of unsaturated porous rocks based on the proposed models which are in good agreement with the experimental data and model predictions reported in the literature. The proposed model improved the understanding of the physical mechanisms of water flow through unsaturated porous rocks.

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Pore design and engineering for filters and membranes

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2005.1690 ◽

2005 ◽

Vol 364 (1838) ◽

pp. 161-174 ◽

Cited By ~ 41

Author(s):

Richard Holdich ◽

Serguei Kosvintsev ◽

Iain Cumming ◽

Sergey Zhdanov

Keyword(s):

Experimental Data ◽

Fluid Flow ◽

Pore Size ◽

Suspended Material ◽

Slot Length ◽

Depth Filtration ◽

Flow Through ◽

Pore Flow ◽

Modern Manufacturing ◽

Manufacturing Techniques

In filtration, the concept of pore size is not easy to define. In microfiltration, there are numerous advantages in employing a surface filtering membrane, rather than one relying on depth filtration mechanisms from a tortuous pore flow channel. Modern manufacturing techniques provide means to produce surface filtering membranes. For filtration, it is shown that a suitable pore design is an array of long thin slots. An analysis of fluid flow through the slots suggests that a short slot is adequate, but experimental data with suspended material indicates that slot length is important. Using long slots and careful control of the flow through the membrane it is possible to filter deforming particles such as oil drops from water.

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Rheological Flows in Channels With Complex Geometry and Porous Medium

Volume 1 ◽

10.1115/ht-fed2004-56535 ◽

2004 ◽

Author(s):

Ramiz S. Gurbanov ◽

Eldar T. Abdinov ◽

Sayavur I. Bakhtiyarov

Keyword(s):

Porous Medium ◽

Complex Variable ◽

Rheological Behavior ◽

Complex Geometry ◽

Variable Method ◽

Rheological Equation ◽

Flow Rates ◽

Approach Method ◽

Flow Through ◽

First Time

The article describes a new method of rheological stationary fluids flow calculation in pipes and channels. By means of a complex variable method the universal formulae for velocities and flow rates distribution have been received. A technique called “linearization of single-bonded area” has been used in this research. The quasi Newtonian approach method has been suggested for the first time. To study of rheological stationary fluids flow in porous medium the model of “hypothetical canal” is assumed. This model allows predicting the rheological behavior of anomalous fluids flow through porous medium based on the results obtained on the capillary flowmeter. The “real” rheological equation of condition construction has been pointed out. The resistance laws generalized for the rheological stationary fluid have been received.

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