The thicker (higher viscosity) of an oil, the slower it will flow. The main causes of high viscosity are the presence of solids and high Furthermore, the impact of low-Reynolds-number oil flows in combination with high-Reynolds-number gas and water flows may yield new flow patterns and concomitant pressure-drop behaviors. DOI:10.1016/0301-9322(87)90002-4. <> %���� Viscosity Effect and Flow Development inHorizontal Slug Flows. 1976. Fig. 4 0 obj While a log mixing rule or a 1/4 power mixing rule overestimated theviscosity effects, a mole fraction weighted average of the oil and waterviscosities was found to match the experimental data. DOI:10.1016/0301-9322(93)90092-9. Taitel, Y. and Dukler, A.E. During oil extraction, the high viscosity of crude oil cause major problems, affecting negatively the oil production rate. Onthe effect of viscosity on stability of stratified gas—liquid flow—applicationto flow pattern transition at various pipe inclinations. ChemicalEngineering Science 46 (8): 2123-2131.DOI:10.1016/0009-2509(91)80170-4. J.P. Hartnett and T.F. In the petroleum industry, it is encountered in the production and transportation of oil and gas. and Stuart, A.D. 2003. The effects of a highlyviscous liquid phase on vertically upward two-phase flow in a pipe.International Journal of Multiphase Flow 29 (9): 1523-1549.DOI:10.1016/S0301-9322(03)00122-8. However the difference between the values of the ratio increases with an increase of the clearance. A model for predicting flowregime transitions in horizontal and near-horizontal gas-liquid flow.AIChE Journal 22 (1): 47-55.DOI: 10.1002/aic.690220105. Barnea, D. 1987. Colmenares, J., Ortega, P., Padrino, J., and Trallero, J.L. DOI:10.2118/20631-MS. Zhang, H.-Q., Wang, Q., Sarica, C., and Brill, J.P. 2003. <>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 841.92] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> It is correct for any rotation speed and any oil clearance values. Gas/liquid two-phase flow in pipes is a common occurrence in the petroleum, chemical, nuclear, and geothermal industries. |d��E鈀�H��.a�I��~�4@��;�$�� ��E)U��V��X�Ò����� y�mT�jWw�v�y�6UKY\P�}� Barnea, D. and Taitel, Y. International Journal of Multiphase Flow 19 (4):639-649. Some modifications are identified and implemented to the closure relationships employed in the Zhang et al. Irvine, 83-132. Effect of liquidviscosity on the stratified-slug transition in horizontal pipe flow.International Journal of Multiphase Flow 15 (6): 877-892.DOI:10.1016/0301-9322(89)90017-7. endobj ASME Journal ofEnergy Resources Technology 125 (4): 266-273.DOI:10.1115/1.1615618. Chemical Engineering Science 54 (8): 1071-1079.DOI:10.1016/S0009-2509(98)00423-0. 4 Effect of oil viscosity on oil pressure distribution at 2000, 4000 and 8000 RPM. Effects of FluidProperties and Pipe Diameter on Two-Phase Flow Patterns in HorizontalLines. In the present study, low viscosity grade oils - SAE 0W-20, SAE 5W-30 and SAE 20W-40 as the baseline oil, were selected for assessing engine oil effects on fuel economy of diesel engines. Effects of liquidsviscosity on flow pattern in vertical upward gas-liquid two-phase flow.International Journal of Multiphase Flow 27 (6): 1109-1126.DOI:10.1016/S0301-9322(00)00066-5. h,hʵ`o������m�YQ���^Z����GEe;JW��Q�SE���_l �I���{YĪ�� 1989. Andritsos, N., Williams, L., and Hanratty, J. Effects of High Oil Viscosity on Two-Phase Oil-Gas FlowBehavior in Horizontal Pipes. Many studies have focused on evaluating the properties of different crude oil grades and their production techniques. After these modifications, the model predictions provide better agreement with experimental results for flow pattern transition, pressure gradient, and liquid holdup. London:Academic Press. 7.4.3 Market analysis /supply and demand forecasting/pricing, Effect of liquidviscosity on the stratified-slug transition in horizontal pipe flow, Kelvin-Helmholtzstability criteria for stratified flow: viscous versus non-viscous (inviscid)approaches, Aunified model for predicting flow-pattern transitions for the whole range ofpipe inclinations, Onthe effect of viscosity on stability of stratified gas—liquid flow—applicationto flow pattern transition at various pipe inclinations, Slug Flow Model for the Prediction ofPressure Drop for High Viscosity Oils in a Horizontal Pipeline, Effects of liquidsviscosity on flow pattern in vertical upward gas-liquid two-phase flow, The effects of a highlyviscous liquid phase on vertically upward two-phase flow in a pipe, Effects of the liquidviscosity on the phase distributions in horizontal gas-liquid slug flow, The effect of liquidviscosity on gas wall and interfacial shear stress in horizontal two-phase pipeflow, A model for predicting flowregime transitions in horizontal and near-horizontal gas-liquid flow, Effect of pipe length onthe transition boundaries for high-viscosity liquids, Effects of FluidProperties and Pipe Diameter on Two-Phase Flow Patterns in HorizontalLines, A Comprehensive Mechanistic Model forTwo-phase Flow in Pipelines, Unified model for gas-liquid pipeflow via slug dynamics--Part 1: model development, Robert E. Sheriff's Encyclopedic Dictionary of Applied Geophysics, fourth edition. High-viscosity or "heavy oil" has become one of the most important future hydrocarbon resources, with ever-increasing world energy demand and depletion of conventional oils. The quality of an engine oil depends on the base stock and its properties as well as on the additives. MS thesis, University of Tulsa, Tulsa,Oklahoma. Barnea, D. 1991. ��$���d�.��p�P�"�mg�t g:p+\ݬ��!�d�b� ��f4�����Lj1�` Ũ��8���%������C����5���^��Af�A�� G}��x�����ac� �(�ԫ7z�M�IG�.��TS�TH�#�˦��� jLg8�h�g�ř��L�. 2 0 obj Taitel, Y. and Dukler, A.E. Accurate prediction of the flow pattern, pressure drop, and liquid holdup is imperative for the design of production and transport systems. }x��d��pOON~:����GC�HU1~��;�:��X ���� �_�s�?����o��������v�+��5�pãT����FE�Պ��{�M��z�� �T�5�N.�?��jq���Po+�D���-"�!Y$�=�ޢ &ىIB�H�Fo]g��VRi$L����rg�8J�=`0,�S嫓&��:{���u�H>�ԑq�$�C/�X}�����I��=-@3�^�/y��nMI�����{)L�=3���n�s�L��' ��,ډ�*�絢1PW���)����NQS��[��j+؋#P\ A Comprehensive Mechanistic Model forTwo-phase Flow in Pipelines. <>>> Last modified: 2020/01/18 by dmitri_kopeliovich, Effect of oil viscosity on hydrodynamic friction of engine bearings, http://www.substech.com/dokuwiki/doku.php?id=pmax_black_-_strengthened_tri-metal_bearing_materials_for_high_performance_bearings, http://www.substech.com/dokuwiki/doku.php?id=engine_oils, http://www.substech.com/dokuwiki/doku.php?id=engine_bearing_failure, Engine parameters determining bearing loading, Geometrical parameters of engine bearings, Manufacturing bi-metal strips for copper bearings, Continuous casting of aluminum based bearing alloys, Manufacturing bi-metal strips for aluminum bearings, Effect of low viscosity oils on engine bearings, pMax Black™ - Strengthened Tri-metal Bearing Materials for High Performance Bearings, U-Groove™ Modified Design of Oil Groove for High Performance Bearings, ElliptiX™ Oil Hole of New Design for High Performance Bearings, EccentriX™ Optimal Eccentricity for High Performance Bearings, RadiaLock™ - Design of Crush Height for Reliable Press Fit of High Performance Bearings, Optimization of Clearance Design for High Performance Engine Bearings, Modern Trends In Materials For High Performance Engine Bearings, Development of Performance Bearings for Race Engines of Modern Design, Failures of Engine Bearings and their Prevention, Engine Bearing Housing and How it Affects Engine Bearings, Polymer Coatings for Race Engine Bearings, http://www.marinediesels.info/2_stroke_engine_parts/Other_info/bearing_materials.htm, http://www.waukbearing.com/downloads/Material_For_Plain_Bearings.pdf, http://www.ilot.edu.pl/Journal%20of%20KONES%202004/01/46.pdf, Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.

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