TECHNOLOGICAL PIPELINES CALCUCATION FEATURES FOR HIGH-VISION OIL PRODUCTS TRANSPORTATION

Purpose. Scientific basis substantiation for the technological calculation of main pipelines. Which are pumping high viscosity non-Newtonian liquids, taking into account the peculiarities behavior of the full Buckingham equation solution in various intervals of the values included in it. Methodology. The modern methods analysis for calculating rational parameters of the high viscosity non-Newtonian fluid viscosity transportation modes which made it possible to substantiate the specificity of the rheological characteristics of these liquids, taking into account the possibility of controlling their rheological properties by introducing surface-active reagents or a heterogeneous medium of lower viscosity. Findings. The scientific and methodological support for the calculation of the rational parameters of high viscosity non-Newtonian liquids transportation modes for main pipelines is substantiated, in order to ensure an increase in the efficiency of their operation. At the same time, the dependencies proposed in the work take into account the possibility of evaluating changes in the main pipelines operation parameters and modes with forced regulation by the rheological parameters of the pumped medium. Originality. Based on the modern methods of technological calculations of the main pipelines operation parameters analysis, the hydrodynamic feature of the high viscosity non-Newtonian fluids is determined, which is that the dependence of the hydraulic slope on the initial tangential stress and costs are expressed by a linear superposition of the terms containing these values, and the proportional coefficients are independent from the rheological characteristics of the environment, the properties of the transported and the pipeline diameter. Practical value. It consists in improved methods for calculating rational parameters for the transportation of slurries, slurries and high viscosity liquids in main pipelines. These methods allow to determine the pipeline diameter value, the choice of pumps indicators, taking into account the effective viscosity, as well as the initial tangential stress of high viscosity non-Newtonian fluid in order to reduce the energy intensity of transportation, save resources and improve the environmental safety of industrial areas. Key words: high viscosity non-Newtonian fluid, rheological characteristics, main pipeline, technological calculation

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EFFERVESCENT ATOMIZATION OF HIGH-VISCOSITY FLUIDS: PART I. NEWTONIAN LIQUIDS

Atomization and Sprays ◽

10.1615/atomizspr.v1.i3.10 ◽

1991 ◽

Vol 1 (3) ◽

pp. 239-252 ◽

Cited By ~ 47

Author(s):

Harry N. Buckner ◽

Paul E. Sojka

Keyword(s):

High Viscosity ◽

Newtonian Liquids

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Effects of optimal concentrations of asphalt-tar substances and wax on the rheological characteristics of high-viscosity petroleum during transport in large pipelines

Journal of Engineering Physics ◽

10.1007/bf00825635 ◽

1984 ◽

Vol 46 (6) ◽

pp. 712-713

Author(s):

A. M. Shammazov

Keyword(s):

High Viscosity ◽

Rheological Characteristics

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A New Method for Calculating the Inflection Point Temperature of Heavy-Oil Rheology Transforming from Non-Newton Fluid into the Newton Fluid

Journal of Energy Resources Technology ◽

10.1115/1.4052717 ◽

2021 ◽

pp. 1-16

Author(s):

Dong Liu ◽

Yonghui Liu ◽

Nanjun Lai ◽

Youjun Ji ◽

TingHui Hu

Keyword(s):

Newtonian Fluid ◽

Heavy Oil ◽

Inflection Point ◽

High Viscosity ◽

Current Approach ◽

Temperature Data ◽

New Method ◽

Good Correspondence ◽

Point Temperature ◽

Shengli Oilfield

Abstract The inflection point temperature of rheology (IPTR) of heavy oil transforming from a non-Newtonian fluid into a Newtonian fluid is a key parameter in the steam huff- and-puff process. It is particularly relevant in terms of optimizing injection parameters, calculating the heating radius, and determining well spaces. However, the current approach exhibits obvious shortcomings, such as the randomness of the selected tangent line and inadaptability for extra-heavy oil with high viscosity. Therefore, this paper presents a novel method for calculating IPTR using viscosity–temperature data. The approach is based on the Arrhenius equation and quantitatively evaluates the IPTR according to the inflection point of the apparent activation energy. The IPTR values of four heavy-oil samples obtained from the Bohai Oilfield in China were quantitatively predicted according to viscosity–temperature data using the proposed method. The method's accuracy was verified by a series of rheological investigations on samples obtained from two heavy-oil wells. Additionally, the new method was used to predict IPTR according to the published viscosity–temperature data of 10 heavy-oil samples from the Shengli Oilfield. Again, a good correspondence was found, and mean absolute and relative errors of 3°C and 4.6%, respectively, were reported. Therefore, the proposed model was confirmed to improve the prediction accuracy of the existing method, and provided a new method for calculating the IPTR of heavy-oil.

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A Solution of the Elastohydrodynamic Problem for Non-Newtonian Fluids

Journal of Lubrication Technology ◽

10.1115/1.3452584 ◽

1975 ◽

Vol 97 (2) ◽

pp. 303-310 ◽

Cited By ~ 4

Author(s):

D. S. Kodnir ◽

R. G. Salukvadze ◽

D. L. Bakashvili ◽

V. Sh. Schwartzman

Keyword(s):

Approximate Solution ◽

Tangential Stress ◽

Newtonian Fluid ◽

Stress Reduction ◽

Fluid Model ◽

Lubricant Film ◽

Newtonian Viscosity ◽

Thermal Problem ◽

Tangential Stresses ◽

Theological Properties

An approximate solution of the stationary isothermal elastohydrodynamic problem has been obtained for a Ree Eyring fluid model also the solution’s algorithm is described for a non Newtonian fluid of an arbitrary model. The solution has been obtained for the complex hydrodynamic and thermal problem for the lubricant film of a non Newtonian fluid with its specified thickness and with a relative surface slip. The diagrams have been made for velocities, temperatures, and tangential stresses in the lubricant film. The solution enables the direct estimation of the tangential stress reduction caused by the non Newtonian fluid’s behavior as well as by the nonisothermal process by means of known theological properties (Newtonian viscosity and time of relaxation) with selected values of pressure and temperature as well as with a given velocity of slip, and with the help of simple nomograms.

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A Method to Determine the Safe Time for High Waxy Crude Pipeline With Uncertainty

Volume 1: Upstream Pipelines; Project Management; Design and Construction; Environment; Facilities Integrity Management; Operations and Maintenance; Pipeline Automation and Measurement ◽

10.1115/ipc2012-90119 ◽

2012 ◽

Author(s):

Bo Xu ◽

Qing Miao ◽

Hao Lan ◽

Feng Yan ◽

Donglei Liu

Keyword(s):

Crude Oil ◽

High Viscosity ◽

Gel Point ◽

Pipeline Transportation ◽

Safety Risk ◽

Related Data ◽

Natural Temperature ◽

Operation Parameters ◽

Operation Pressure ◽

Uncertainty Of Parameters

More than 80% crude oils produced in China has a high content of wax. Pipeline transportation for such high waxy Chinese crude has a serious safety risk due to its characteristics of high gel point (up to 30 degree) and high viscosity below the wax appearance temperature. In the case of pipeline shutdown the crude cools down. After a certain amount of time, depending on the crude oil properties, the crude oil temperature plot file, the hydraulic data as well as the pipeline construction and environmental related data, the required pressure to restart the pipeline might exceed the maximum allowable operation pressure (MAOP) which makes the restart of operation become very difficult or even impossible. To mitigate the safety risk in case of the pipeline shutdown or to avoid congeal accident, determining the safe time after which the pipeline is still able to restart is necessary. However, the complexity of the presented problem lies in the uncertainty of the operation parameters and the environmental related data, such as the uncertainly of the flow rate and natural temperature. A method is developed to predict the safe time based on the uncertainty of parameters. In the method, the field data is firstly collected, then processed and analyzed to obtain the static rules of these data. By doing so, the complexity of uncertainty is successfully handled. The method is then applied to two pipelines, the results show that the safety of the pipeline is ensured and the energy consumption is also significantly reduced.

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NEWTONIAN AND NON-NEWTONIAN BLOOD FLOW AT A 90∘-BIFURCATION OF THE CEREBRAL ARTERY: A COMPARATIVE STUDY OF FLUID VISCOSITY MODELS

Journal of Mechanics in Medicine and Biology ◽

10.1142/s0219519418500434 ◽

2018 ◽

Vol 18 (05) ◽

pp. 1850043 ◽

Cited By ~ 2

Author(s):

S. V. FROLOV ◽

S. V. SINDEEV ◽

D. LIEPSCH ◽

A. BALASSO ◽

P. ARNOLD ◽

...

Keyword(s):

Blood Flow ◽

Newtonian Fluid ◽

Flow Rate ◽

Fluid Model ◽

Cerebral Arteries ◽

High Viscosity ◽

Flow Rate Ratio ◽

Parent Artery ◽

Fluid Viscosity ◽

Recirculating Flow

The majority of numerical simulations assumes blood as a Newtonian fluid due to an underestimation of the effect of non-Newtonian blood behavior on hemodynamics in the cerebral arteries. In the present study, we evaluated the effect of non-Newtonian blood properties on hemodynamics in the idealized 90[Formula: see text]-bifurcation model, using Newtonian and non-Newtonian fluids and different flow rate ratios between the parent artery and its branch. The proposed Local viscosity model was employed for high-precision representation of blood viscosity changes. The highest velocity differences were observed at zones with slow recirculating flow. During the systolic peak the average difference was 17–22%, whereas at the end of diastole the difference increased to 27–60% depending on the flow rate ratio. The main changes in the viscosity distribution were observed distal to the flow separation point, where the non-Newtonian fluid model produced 2.5 times higher viscosity. A presence of such high viscosity region substantially affected the size of the flow recirculation zone. The observed differences showed that non-Newtonian blood behavior had a significant effect on hemodynamic parameters and should be considered in the future studies of blood flow in cerebral arteries.

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NON-NEWTONIAN FLOW IN MICROCHANNELS

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514603858 ◽

2014 ◽

Vol 34 ◽

pp. 1460385

Author(s):

GUIHUA TANG ◽

YINBIN LU ◽

YU SHI

Keyword(s):

Newtonian Fluid ◽

Lattice Boltzmann ◽

Electroosmotic Flow ◽

Practical Significance ◽

Rheological Characteristics ◽

Newtonian Flow ◽

Fundamental Interest ◽

Electroviscous Effect ◽

Boltzmann Method ◽

Pressure Driven Flow

Investigation on Non-Newtonian fluid flow in microchannels is of both fundamental interest and practical significance. The electroosmotic flow under the external electric field and pressure driven flow considering the electroviscous effect for non-Newtonian fluid in microchannels and microscale porous media are numerically studied by using the lattice Boltzmann method. The coupled effects of non-Newtonian rheological characteristics with the microscale electrokinetics are examined and interesting results are obtained.

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Ultrasonic and Heat Treatment of Crude Oils

Energies ◽

10.3390/en12163084 ◽

2019 ◽

Vol 12 (16) ◽

pp. 3084 ◽

Cited By ~ 3

Author(s):

Aidar Kadyirov ◽

Julia Karaeva

Keyword(s):

Heat Treatment ◽

Crude Oil ◽

Rheological Properties ◽

Experimental Method ◽

Ultrasonic Treatment ◽

Experimental Studies ◽

High Viscosity ◽

Crude Oils ◽

Rheological Characteristics ◽

Thermal Heating

One of the methods of influence on rheological properties of heavy high-viscosity crude oils is ultrasonic treatment. Ultrasonic treatment allows reducing the viscosity of crude oil and, therefore, reducing the costs of its production and transportation. In this paper, the influence of ultrasonic treatment on the rheological characteristics of crude oil (sample No. 1 API = 29.1, sample No. 2 API = 15.9) was investigated. An experimental method was developed. Experimental studies were carried out using the Physica MCR 102 rheometer. The influence of the intensity and duration of ultrasonic treatment on the viscosity of the initial crude oils was studied for 24 h. In addition, the rheological characteristics of the treated oil were investigated after its natural cooling to 293 K. The results are compared with similar results for thermal heating.

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