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Articles de revues sur le sujet « Fluid viscosity »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 26 juillet 2025

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1

Xiang, Chaoyang, and Mingjiang Shi. "Research on ultrasonic-based drilling fluid viscosity detection method." Advances in Engineering Research Possibilities and Challenges 1, no. 3 (2025): 1. https://doi.org/10.63313/aerpc.9012.

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Drilling fluid viscosity directly affects the efficiency and safety of drilling op-erations. Proper viscosity can ensure that the drilling fluid can effectively carry drill cuttings and maintain the stability of the well wall. Therefore, re-al-time and accurate viscosity measurement of drilling fluid is crucial to ensure the safety of drilling operation and improve the production efficiency. The arti-cle proposes a method to measure the viscosity of drilling fluid based on ultra-sonic attenuation method. Firstly, an experimental device for ultrasonic drilling fluid viscosity detection was desi

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Yang, Shichu, Weichu Yu, Mingwei Zhao, Fei Ding, and Ying Zhang. "A Review of Weak Gel Fracturing Fluids for Deep Shale Gas Reservoirs." Gels 10, no. 5 (2024): 345. http://dx.doi.org/10.3390/gels10050345.

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Low-viscosity slickwater fracturing fluids are a crucial technology for the commercial development of shallow shale gas. However, in deep shale gas formations with high pressure, a higher sand concentration is required to support fractures. Linear gel fracturing fluids and crosslinked gel fracturing fluids have a strong sand-carrying capacity, but the drag reduction effect is poor, and it needs to be pre-prepared to decrease the fracturing cost. Slick water fracturing fluids have a strong drag reduction effect and low cost, but their sand-carrying capacity is poor and the fracturing fluid sand

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Jia, Sihui, and Mingzhang Luo. "Monitoring of Liquid Viscosity for Viscous Dampers through a Wireless Impedance Measurement System." Applied Sciences 12, no. 1 (2021): 189. http://dx.doi.org/10.3390/app12010189.

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Viscous dampers are a type of seismic damping equipment widely used in high-rise buildings and bridges. However, the viscosity of the damping fluid inside the viscous damper will change over time during its use, which significantly reduces the seismic performance of the viscous damper. Hence, it is necessary to monitor the viscosity of the fluid inside the damper over its service life. In this paper, a damping fluid viscosity monitoring method based on wireless impedance measurement technology is proposed. A piezoelectric sensor is installed in a damper cylinder specimen, and the viscosity of

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Beeson-Jones, Tim H., and Andrew W. Woods. "On the selection of viscosity to suppress the Saffman–Taylor instability in a radially spreading annulus." Journal of Fluid Mechanics 782 (October 6, 2015): 127–43. http://dx.doi.org/10.1017/jfm.2015.512.

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We examine the stability of a system with two radially spreading fronts in a Hele-Shaw cell in which the viscosity increases monotonically from the innermost to the outermost fluid. The critical parameters are identified as the viscosity ratio of the inner and outer fluids and the viscosity difference between the intermediate and outer fluids as a fraction of the viscosity difference between the inner and outer fluids. There is a minimum viscosity ratio of the inner and outer fluids above which, for each azimuthal mode, the system is stable to perturbations of that mode at any flow rate. This

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Vázquez-Greciano, Andrea, César De Santos-Berbel, Antonio Aznar López, and Jesús M. Ortiz Herrera. "Evaluation of the Fluid Properties Modification Through Magnetic Fields for Their Application on Tuned Liquid Dampers: An Experimental Approach." Applied Sciences 15, no. 8 (2025): 4194. https://doi.org/10.3390/app15084194.

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Tuned Liquid Dampers (TLDs) are dissipative devices that mitigate vibrations through the out-of-phase movement of a fluid, typically water, inside a container relative to a main structure. Water’s low density and viscosity have led to modifications to enhance their effectiveness. Fluid properties, such as density or viscosity, significantly impact their performance by altering mass and damping, respectively. When magnetorheological fluids are employed, magnetic fields can modify the fluid viscosity, affecting the damping. This study experimentally examines the effect of a magnetic field and am

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Feneuil, Blandine, Elie N'Gouamba, Jan Ole Skogestad, and Harald Linga. "Effect of Dissolution of CO2 and CH4 on the Flow Curve of Drilling Fluids." Annual Transactions of the Nordic Rheology Society 33 (May 9, 2025): 79–88. https://doi.org/10.31265/atnrs.867.

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When drilling a well, careful choice of drilling fluid is essential to allow, among others, for well stabilization and lubrication of the drill bit. The apparent viscosity of a drilling fluid is one of its major properties affecting the ability to be pumped and to transport particles. However, when the drilling fluid is circulated in a well, it may meet components that affect its properties. Here we investigate the case of a gas kick, i.e., fluid from the rock formation entering the wellbore, and evaluate how the reservoir fluid dissolution affects the apparent viscosity of the fluids. The dri

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Lumsden, Jonathan M., John P. Caron, James F. Steffe, Jenni L. Briggs, and Stephen P. Arnoczky. "Apparent viscosity of the synovial fluid from mid-carpal, tibiotarsal, and distal interphalangeal joints of horses." American Journal of Veterinary Research 57, no. 6 (1996): 879–83. http://dx.doi.org/10.2460/ajvr.1996.57.06.879.

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Abstract Objective To compare the apparent viscosity of normal synovial fluid of the mid-carpal, tibiotarsal, and interphalangeal joints of horses. Design Viscosity evaluation over a range of shear rates was used to characterize the apparent viscosity of synovial fluids from the 3 joints. Animals 60 clinically normal adult horses. Procedure Viscosity data for synovial fluid samples were obtained over a shear rate range of 10 to 250/s and apparent viscosity was calculated at 50, 100, 150, 200, and 250/s. Effect of shear rate on apparent viscosity was determined, using a two-way ANOVA, with sign

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Ramadhan, Dimas, Hidayat Tulloh, and Cahyadi Julianto. "Analysis Study Of The Effect In Selecting Combination Of Fracturing Fluid Types And Proppant Sizes On Folds Of Increase (FOI) To Improve Well Productivity." Journal of Petroleum and Geothermal Technology 1, no. 2 (2020): 92. http://dx.doi.org/10.31315/jpgt.v1i2.3886.

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As fracturing materials, fracturing fluid and proppant are two very important parameters in doing hydraulic fracturing design. The combination of fractuirng fluid and proppant selection is the main focus and determinant of success in the hydraulic fracturing process. The high viscosity of the fracturing fluid will make it easier for the proppant to enter to fill the fractured parts, so that the conductivity of the fractured well will be better and can increase the folds of increase (FOI) compared to fracturing fluid with lower viscosity (Economides, 2000). This research was conducted by using

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Narasimhan, Arunn, and Jose´ L. Lage. "Modified Hazen-Dupuit-Darcy Model for Forced Convection of a Fluid With Temperature-Dependent Viscosity." Journal of Heat Transfer 123, no. 1 (2000): 31–38. http://dx.doi.org/10.1115/1.1332778.

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We investigate numerically the global pressure-drop of fluids with temperature dependent viscosity, flowing through a porous medium channel bounded by two parallel isoflux surfaces. By reviewing the development of the Hazen-Dupuit-Darcy (HDD) equation we bring to light the inappropriateness of the model in estimating the global pressure-drop of fluids with temperature dependent viscosity. Albeit this observation, we tested the accuracy of the HDD model in comparison with numerical results by using three alternatives, namely (1) fluid viscosity determined at the average bulk temperature, (2) fl

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Lebedev, A. V. "Viscosity Anomalies of Magnetic Fluid Stabilized by a Double Layer of Surfactant in Water." Proceedings of the Southwest State University. Series: Engineering and Technology 13, no. 4 (2024): 88–97. http://dx.doi.org/10.21869/2223-1528-2023-13-4-88-97.

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Purpose to study the temperature dependence of the viscosity of a water-based magnetic fluid.Method. Consists of measuring the dynamic viscosity of a magnetic fluid based on cobalt ferrite particles stabilized in water by a double layer of surfactant. Lauric acid (first layer) and a mixture of lauric acid and sodium dodecyl sulfate (second layer) were used as a stabilizer. Measurements were performed using a Brookfield DV-II+Pro rotational viscometer equipped with a coaxial cylinder system. The measuring system of the viscometer was thermostated using a KRIO-VT-12-1 thermostat.Results. The tem

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Annabi, Yosra. "Comparison between Newtonian fluid flow, Stokes flow and Stokes-Oseen flow." International Journal of Multidisciplinary Research and Growth Evaluation 5, no. 5 (2024): 248–51. http://dx.doi.org/10.54660/.ijmrge.2024.5.5.248-251.

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Viscosity is an intrinsic property of fluids. It originates in the thermal interactions of molecular collisions. There are two types of it: kinematic viscosity and dynamic viscosity. In this work, we try to model the flow of viscous fluid in three cases: Newtonian fluid flow, Stokes flow and the Stokes-Oseen flow.

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KAUSHAL, ROHAN, SUNITA SRIVASTAVA, and K. TANKESHWAR. "EFFECT OF MASS ON SHEAR VISCOSITY OF BINARY FLUID MIXTURE CONFINED TO NANOCHANNELS." International Journal of Nanoscience 08, no. 06 (2009): 543–50. http://dx.doi.org/10.1142/s0219581x09006390.

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Flow of fluid in nanochannel has been studied by evaluating transverse stress auto-correlation function and shear viscosity of the Ar–Kr and isotopic fluid mixture interacting via Lennard Jones potential. The enhancement in viscosity due to confinement has been investigated for different mass ratios and concentration of one of the fluids in a binary fluid mixture. It has been found that at a given number density and temperature, mixing fluid of lower molar weight reduces the enhancement in viscosity and also lower the chances of freezing of liquid near the walls. We have also studied the effec

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Li, Peisheng, Chengyu Peng, Peng Du, Ying Zhang, Boheng Dong, and Ming Ma. "The investigation of the viscous fingering phenomenon of immiscible fluids displacement by the Lattice Boltzmann method." Canadian Journal of Physics 98, no. 7 (2020): 650–59. http://dx.doi.org/10.1139/cjp-2019-0120.

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In this paper, the viscous fingering phenomena of two immiscible fluids with a large viscosity ratio was simulated by the Lattice Boltzmann method. The Rothman–Keller Lattice Boltzmann model was applied to study the viscous fingering phenomena in a microchannel where the high viscosity fluids were displaced by low viscosity fluids. We have investigated the influences of parameters such as viscosity ratio (M), surface wettability, capillary number (Ca), and Reynolds number (Re) on finger structures, breakthrough time (Ts), and areal sweep efficiency (Se). In particular, the effects of surface t

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Malhotra, Sahil, Eric R. Lehman, and Mukul M. Sharma. "Proppant Placement Using Alternate-Slug Fracturing." SPE Journal 19, no. 05 (2014): 974–85. http://dx.doi.org/10.2118/163851-pa.

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Summary New fracturing techniques, such as hybrid fracturing (Sharma et al. 2004), reverse-hybrid fracturing (Liu et al. 2007), and channel (HiWAY) fracturing (Gillard et al. 2010), have been deployed over the past few years to effectively place proppant in fractures. The goal of these methods is to increase the conductivity in the proppant pack, providing highly conductive paths for hydrocarbons to flow from the reservoir to the wellbore. This paper presents an experimental study on proppant placement by use of a new method of fracturing, referred to as alternate-slug fracturing. The method i

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Zhang, Anni, and Eric S. G. Shaqfeh. "Rheology of non-Brownian particle suspensions in viscoelastic solutions. Part II: Effect of a shear thinning suspending fluid." Journal of Rheology 67, no. 2 (2023): 517–40. http://dx.doi.org/10.1122/8.0000541.

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The shear rheology of particle suspensions in shear-thinning polymeric fluids is studied experimentally using parallel plate measurements and numerically using fully resolved, 3D finite volume simulations with the Giesekus fluid model. We show in our experiments that the steady shear viscosity and first normal stress difference coefficient of the suspension evolve from shear-thickening to substantially shear-thinning as the degree of shear-thinning of the suspending fluid increases. Moreover, in highly shear-thinning fluids, the suspension exhibits greater shear-thinning of the viscosity than

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Arnipally, Sumanth Kumar, and Ergun Kuru. "Settling Velocity of Particles in Viscoelastic Fluids: A Comparison of the Shear-Viscosity and Elasticity Effects." SPE Journal 23, no. 05 (2018): 1689–705. http://dx.doi.org/10.2118/187255-pa.

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Summary The objective of this paper is to determine how fluid shear viscosity and elasticity might influence the particle-settling velocity, and even more so to answer the question of which one of these two rheological properties is more dominant in controlling the particle-settling velocity when viscoelastic drilling fluids are used. The settling velocities of spherical particles (diameters: 1.18, 1.5, 2, and 3 mm) in partially hydrolyzed polyacrylamide (HPAM) polymer fluids were measured using the particle-image-shadow graph (PIS) technique. Two sets of test fluids were formulated by mixing

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Ait Abderrahmane, Hamid, Shahid Rabbani, and Mohamed Sassi. "Inertia Effects in the Dynamics of Viscous Fingering of Miscible Fluids in Porous Media: Circular Hele-Shaw Cell Configuration." Energies 14, no. 19 (2021): 6432. http://dx.doi.org/10.3390/en14196432.

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We present a numerical study of viscous fingering occurring during the displacement of a high viscosity fluid by low viscosity fluid in a circular Hele-Shaw cell. This study assumes that the fluids are miscible and considers the effects of inertial forces on fingering morphology, mixing, and displacement efficiency. This study shows that inertia has stabilizing effects on the fingering instability and improves the displacement efficiency at a high log-mobility-viscosity ratio between displacing and displaced fluids. Under certain conditions, inertia slightly reduces the finger-split phenomenon

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Ballato, A. "MEMS fluid viscosity sensor." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 57, no. 3 (2010): 669–76. http://dx.doi.org/10.1109/tuffc.2010.1463.

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Yue, Qian Sheng, Qing Zhi Yang, Shu Jie Liu, Bao Sheng He, and You Lin Hu. "Rheological Properties of Water Based Drilling Fluid in Deep Water Drilling Conditions." Applied Mechanics and Materials 318 (May 2013): 507–12. http://dx.doi.org/10.4028/www.scientific.net/amm.318.507.

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The rheological property of the drilling fluid was one of the focus problems in deep-water drilling, which was widely concerned. In the article, the viscosity-temperature properties of commonly used water soluble polymeric solution, polymeric brine solution, bentonite slurry, polyacrylamide-potassium chloride drilling fluid with different densities and water-base drilling fluid systems commonly used for China offshore well drillings were studied. 4°C-to-20°C viscosity ratio and 4°C-to-20°C YP ratio were used to judge the thickening level of drilling fluids due to low temperature. The experimen

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Muratova, Samal, Boranbay Ratov, Volodymyr Khomenko, Oleksandr Pashchenko, and Oleksandr Kamyshatskyi. "Improvement of the methodology for measuring plastic viscosity and dynamic shear stress of drilling fluids." IOP Conference Series: Earth and Environmental Science 1491, no. 1 (2025): 012026. https://doi.org/10.1088/1755-1315/1491/1/012026.

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Abstract This article focuses on developing a methodology for measuring the rheological properties of drilling fluids using the Marsh funnel, an essential tool for analyzing drilling fluids. The primary objective is to determine plastic viscosity and dynamic shear stress based on apparent viscosity measurements, facilitating the assessment of fluid behavior under mechanical loads. The study systematically analyzes scientific and technical literature on determining the rheological properties of fluids, particularly drilling fluids. A detailed analysis of the flow process in the Marsh funnel exa

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Ye, Kaijie, Denghui He, Lin Zhao, and Pengcheng Guo. "Influence of Fluid Viscosity on Cavitation Characteristics of a Helico-Axial Multiphase Pump (HAMP)." Energies 15, no. 21 (2022): 8149. http://dx.doi.org/10.3390/en15218149.

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Fluid viscosity is one of the key factors affecting the cavitation characteristics of the Helico-axial Multiphase Pump (HAMP). In this paper, fluids with viscosities of 24.46 mm2/s, 48.48 mm2/s, 60.70 mm2/s, and 120.0 mm2/s were investigated by numerical simulation. The Ansys Fluent software was employed to conduct the simulation. The mixture multiphase flow model and the RNG k-ε turbulence model were adopted. The Singhal cavitation model was employed to consider the effects of the non-condensable gas on cavitation. An experiment was carried out to validate the numerical method. The results sh

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Yu, Yongjie, Zhiguo Wang, Yixing Yang, Yang Liu, Xuanchen Wu, and Leixin Yin. "Effects of pyroelectric nanoparticles on the temperature resistance of VES fracturing fluids." Journal of Physics: Conference Series 2993, no. 1 (2025): 012034. https://doi.org/10.1088/1742-6596/2993/1/012034.

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Abstract The production of oil and gas in China predominantly relies on low-permeability reservoirs and unconventional resources. Enhancing the temperature stability of fracturing fluids is a critical strategy to boost recovery from unconventional oil and gas reservoirs. This study investigates the thermal stability of VES fracturing fluids through rheological testing, aiming to identify the optimal system and dosage based on their thermal resistance. The findings indicate that at 60°C, the zero-shear viscosity of the base fluid was 9.9 Pa·s, with a relaxation time of 0.079 s. Upon addition of

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Kontaxi, Georgia, Yorgos G. Stergiou, and Aikaterini A. Mouza. "Experimental Study of Bubble Formation from a Micro-Tube in Non-Newtonian Fluid." Micromachines 12, no. 1 (2021): 71. http://dx.doi.org/10.3390/mi12010071.

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Over the last few years, microbubbles have found application in biomedicine. In this study, the characteristics of bubbles formed when air is introduced from a micro-tube (internal diameter 110 μm) in non-Newtonian shear thinning fluids are studied. The dependence of the release time and the size of the bubbles on the gas phase rate and liquid phase properties is investigated. The geometrical characteristics of the bubbles are also compared with those formed in Newtonian fluids with similar physical properties. It was found that the final diameter of the bubbles increases by increasing the gas

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Kontaxi, Georgia, Yorgos G. Stergiou, and Aikaterini A. Mouza. "Experimental Study of Bubble Formation from a Micro-Tube in Non-Newtonian Fluid." Micromachines 12, no. 1 (2021): 71. http://dx.doi.org/10.3390/mi12010071.

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Over the last few years, microbubbles have found application in biomedicine. In this study, the characteristics of bubbles formed when air is introduced from a micro-tube (internal diameter 110 μm) in non-Newtonian shear thinning fluids are studied. The dependence of the release time and the size of the bubbles on the gas phase rate and liquid phase properties is investigated. The geometrical characteristics of the bubbles are also compared with those formed in Newtonian fluids with similar physical properties. It was found that the final diameter of the bubbles increases by increasing the gas

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Schäfer, Thomas. "Fluid Dynamics and Viscosity in Strongly Correlated Fluids." Annual Review of Nuclear and Particle Science 64, no. 1 (2014): 125–48. http://dx.doi.org/10.1146/annurev-nucl-102313-025439.

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Gucluer, Sinan. "A Miniaturized Archimedean Screw Pump for High-Viscosity Fluid Pumping in Microfluidics." Micromachines 14, no. 7 (2023): 1409. http://dx.doi.org/10.3390/mi14071409.

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Microfluidic devices have revolutionized the field of lab-on-a-chip by enabling precise manipulation of small fluid volumes for various biomedical applications. However, most existing microfluidic pumps struggle to handle high-viscosity fluids, limiting their applicability in certain areas that involve bioanalysis and on-chip sample processing. In this paper, the design and fabrication of a miniaturized Archimedean screw pump for pumping high-viscosity fluids within microfluidic channels are presented. The pump was 3D-printed and operated vertically, allowing for continuous and directional flu

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NOGUEIRA, P. C., and R. CHAN. "RADIATING GRAVITATIONAL COLLAPSE WITH SHEAR VISCOSITY AND BULK VISCOSITY." International Journal of Modern Physics D 13, no. 08 (2004): 1727–52. http://dx.doi.org/10.1142/s0218271804005158.

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A model of a collapsing radiating star consisting of a fluid with shear viscosity and bulk viscosity undergoing radial heat flow with outgoing radiation is studied. This kind of fluid is the most general viscous fluid we can have. The pressure of the star, at the beginning of the collapse, is isotropic but, due to the presence of the shear viscosity and the bulk viscosity, the pressure becomes more and more anisotropic. The radial and temporal behaviors of the density, pressure, mass, luminosity, the effective adiabatic index and the Kretschmann scalar are analyzed. The collapsing time, densit

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Qin, Zhipeng, Wei Huang, Zhipeng Ning, and Kang Hu. "Exchange Flows in Inclined Pipes with Different Viscosity Ratios." Applied Sciences 14, no. 4 (2024): 1573. http://dx.doi.org/10.3390/app14041573.

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In this study, we investigated the effects of the viscosity ratio (β) and the angle of inclination (θ) on the change in the flow regime of two fluids undergoing exchange flow in a pipe, using a combination of experimental and theoretical methods. In our experiments, we observed that changing either the viscosity ratio or the inclination angle of the pipe causes a change in the fluidity of the two fluids. For the upward-flowing light fluid, we observed four flow regimes: axisymmetric core-annular flow (CAF), eccentric core-annular flow (ECAF), transitional side-by-side flow (eccentric and side-

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Braun, Heinrich R., Spyridon Korres, Peter Laurs, and Joerg W. H. Franke. "Impact of Ultra-Low Viscosity Fluids on Drivetrain Functionality and Durability." Lubricants 9, no. 12 (2021): 119. http://dx.doi.org/10.3390/lubricants9120119.

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Increasing automotive powertrain electrification is impacting drivetrain complexity and the profiles of the fluids needed. Since the millennium, drivetrain fluid viscosities have been reduced for better efficiency, but this new challenge is driving them to unprecedented low levels. This paper assesses some of the potential implications of ultra-low viscosity fluids on drivetrain functionality and durability. Model formulations have been prepared from a variety of base fluids combined with additive packages. These have been evaluated in typical automotive drivetrain rig tests, as well as with s

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HESSE, M. A., H. A. TCHELEPI, B. J. CANTWEL, and F. M. ORR. "Gravity currents in horizontal porous layers: transition from early to late self-similarity." Journal of Fluid Mechanics 577 (April 19, 2007): 363–83. http://dx.doi.org/10.1017/s0022112007004685.

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We investigate the evolution of a finite release of fluid into an infinite, two-dimensional, horizontal, porous slab saturated with a fluid of different density and viscosity. The vertical boundaries of the slab are impermeable and the released fluid spreads as a gravity current along a horizontal boundary. At early times the released fluid fills the entire height of the layer, and the governing equation admits a self-similar solution that is a function of the viscosity ratio between the two fluids. This early similarity solution describes a tilting interface with tips propagating as x ∝ t1/2.

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Ortega-Torres, E., E. J. Villamizar-Roa, and M. A. Rojas-Medar. "Micropolar Fluids with Vanishing Viscosity." Abstract and Applied Analysis 2010 (2010): 1–18. http://dx.doi.org/10.1155/2010/843692.

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A study of the convergence of weak solutions of the nonstationary micropolar fluids, in bounded domains of , when the viscosities tend to zero, is established. In the limit, a fluid governed by an Euler-like system is found.

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Li, Wei, and Pengzhan Huang. "A decoupled algorithm for fluid-fluid interaction at small viscosity." Filomat 37, no. 19 (2023): 6365–72. http://dx.doi.org/10.2298/fil2319365l.

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In this paper, a decoupled finite element algorithm is proposed for solving the fluid-fluid interaction at small viscosity. The basic idea of the presented algorithm is to first solve an artificial viscosity elliptic problem with explicit treatment for nonlinear interface conditions, and then solve an artificial viscosity Stokes problem to correct the previous solution. The unconditional stability is established and the efficiency is illustrated by some numerical tests.

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Wu, Chenjun, Qingxu Zhang, Xinpeng Fan, Yihu Song, and Qiang Zheng. "Magnetorheological elastomer peristaltic fluid conveying system for non-Newtonian fluids with an analogic moisture loss process." Journal of Intelligent Material Systems and Structures 30, no. 13 (2019): 2013–23. http://dx.doi.org/10.1177/1045389x19853625.

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A magnetorheological elastomer peristaltic fluid conveying system consisting of a magnetorheological elastomer tube and two electromagnets implements controlled movements via an external magnetic field with varying periods of driving voltages to convey non-Newtonian fluids over a certain time period. The effects of backpressure at the outlet of the magnetorheological elastomer peristaltic fluid conveying system, the viscosity of fluids at zero shear rate, and moisture loss along the longitudinal direction on net pumped volume are investigated systematically. The results demonstrate that the ne

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Naduvinamani, N. B., and Bhagyashri Kotreppa Koppa. "Impact of Viscosity Variation on The Static and Dynamic Characteristics of Squeeze Film Lubrication of Rough Short Journal Bearing With Micropolar Fluid." Indian Journal Of Science And Technology 18, no. 8 (2025): 595–607. https://doi.org/10.17485/ijst/v18i8.3402.

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Objectives: The theoretical examination of the impact of variation in viscosity of micropolar fluid lubricant on dynamic and static characteristics of rough short journal bearings lubrication with squeezing effect and to compare it with the performance of non-viscosity variation. Method: The mathematical model for the physical problem considered, modified stochastic Reynolds type equation assessing for variation in viscosity of micropolar fluid and structure of roughness on bearing surface is inferences by exploiting a random variable having stochastic behavior with non–zero mean, skewness and

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Yang, Zhengming, Zhuangzhi Ma, Yutian Luo, Yapu Zhang, Hekun Guo, and Wei Lin. "A Measured Method for In Situ Viscosity of Fluid in Porous Media by Nuclear Magnetic Resonance." Geofluids 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/9542152.

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At present, the existing measuring methods for viscosity of fluid can only obtain the viscosity of bulk fluid, while the in situ viscosity of fluid in porous media cannot be acquired. In this paper, with the combination of nuclear magnetic resonance (NMR) and physical simulation experiment, a testing method for in situ viscosity of fluid in porous media is established, and the in situ viscosity spectra of water in tight cores under different displacement conditions is obtained. The experimental results show that the in situ viscosity distribution of water in porous media is inhomogeneous, and

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SHIMADA, K., and S. KAMIYAMA. "HYDRODYNAMIC CHARACTERISTICS OF ELECTRORHEOLOGICAL FLUID IN A PARALLEL DUCT FLOW." International Journal of Modern Physics B 15, no. 06n07 (2001): 980–87. http://dx.doi.org/10.1142/s0217979201005507.

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An experimental investigation is conducted to clarify the hydrodynamic characteristics of ERF with elastic particles of smectite in a two-dimensional parallel duct of various widths. Experimental data on pressure difference to a volumetric flow rate in a supplying D.C. electric field are measured. These data are arranged to obtain the apparent viscosit by using the integral method of rheology. From the data of apparent viscosity, the wall friction coefficient is obtained. The increment of the apparent viscosity caused by the applying electric field is a function of shear rate as well as the el

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Shetty, Mayank Udayakumar, and Dhananjay Vijay Kapse. "Fabrication and Validation of Rotational Viscometer." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (2022): 728–31. http://dx.doi.org/10.22214/ijraset.2022.45341.

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Abstract: An efficient rotational viscometer capable of determining viscosity of Non-Newtonian fluids has been developed and the design of this viscometer is described in detail in this paper. The Equations to find the viscosity of fluids is described in this paper. Viscosity of a Non-Newtonian fluid (ketchup) is found. The instrument is calibrated using standard fluids and a correction coefficient is obtained. An efficient method to find the viscosity of Non-Newtonian fluids is introduce in this paper

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Qiu, Ruofan, Anlin Wang, Qiwei Gong, and Tao Jiang. "Simulation of two-phase fluid mixture flow in rectangular two-inlet cavity using lattice Boltzmann method." International Journal of Modern Physics C 25, no. 04 (2014): 1450004. http://dx.doi.org/10.1142/s0129183114500041.

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In this paper, two-phase fluid mixture flow in rectangular two-inlet cavity is studied using lattice Boltzmann method (LBM). To simulate two-phase fluids with large viscosity difference, the pseudo-potential model is improved. The improved model is verified for surface tension through Laplace's law and shown much better performance in simulating fluids with large viscosity difference than pseudo-potential model. The multiple-relaxation-time (MRT) scheme is used to enhance numerical stability. Then the two-phase fluid mixture flow with same and different viscosity in two-inlet cavity is simulat

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Li, Zixian, Decai Li, Yanwen Li, and Shuntao Han. "Influence of High Viscosity and Magnetoviscous Effect on the Washout Resistance of Magnetic Fluid." Magnetochemistry 9, no. 5 (2023): 134. http://dx.doi.org/10.3390/magnetochemistry9050134.

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Magnetic fluid seals have long been thought to be a successful sealing form while sealing liquids are always a challenge. The instability of the liquid–liquid interface under the washout has become the key technical problem that hinders the realization of sealing liquid. This work mainly presents an experimental study about the influence of high viscosity and magnetoviscous effects on washout resistance. Three engine oil-based magnetic fluids of different viscosities were prepared with two kinds of surfactants. The magnetoviscous effects of the prepared magnetic fluids under different working

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Zhang, Xianfa, Jinsheng Sun, Zonglun Wang, Jingping Liu, and Kaihe Lv. "Development and evaluation of a high temperature and high salinity resistant rheological enhancer for water-based drilling fluids." Journal of Physics: Conference Series 2353, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1742-6596/2353/1/012001.

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Abstract A rheology enhancer MMA for water-based drilling fluids was developed using acrylamide (AM), sodium p-styrenesulfonate (SSS), maleic anhydride (MA) and lauryl methacrylate (LMA). MMA has hydrophobic side chains that can form hydrophobic association structures in the drilling fluid, thus giving the drilling fluid the properties of NaCl-promoted viscosity enhancement. When the drilling fluid with 2% MAA was hot-rolling at 200°C and 30% NaCl for 16h, its apparent viscosity and yield point were 29.0 mPa·s and 12.0 Pa, respectively. Meanwhile, its rheological enhancement and viscosity rete

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Kato, H., Y. Fujii, H. Yamaguchi, and M. Miyanaga. "Frictional Drag Reduction by Injecting High-Viscosity Fluid Into Turbulent Boundary Layer." Journal of Fluids Engineering 115, no. 2 (1993): 206–12. http://dx.doi.org/10.1115/1.2910125.

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This paper presents a new method to reduce turbulent frictional drag by injecting high-viscosity fluid into the boundary layer. When the turbulent region of the boundary layer is filled with high-viscosity fluid, and the viscosity of the viscous sublayer is kept low, the Reynolds stress in the turbulent region is reduced and therefore requires a greater velocity gradient to transfer the momentum. The greater velocity gradient in the turbulent region results in a reduction of the velocity gradient at the viscous sublayer, which causes a drop in shear stress at the wall. Such a boundary-layer st

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Fetecau, Constantin, Dumitru Vieru, Tehseen Abbas, and Rahmat Ellahi. "Analytical Solutions of Upper Convected Maxwell Fluid with Exponential Dependence of Viscosity under the Influence of Pressure." Mathematics 9, no. 4 (2021): 334. http://dx.doi.org/10.3390/math9040334.

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Some unsteady motions of incompressible upper-convected Maxwell (UCM) fluids with exponential dependence of viscosity on the pressure are analytically studied. The fluid motion between two infinite horizontal parallel plates is generated by the lower plate, which applies time-dependent shear stresses to the fluid. Exact expressions, in terms of standard Bessel functions, are established both for the dimensionless velocity fields and the corresponding non-trivial shear stresses using the Laplace transform technique and suitable changes of the unknown function and the spatial variable in the tra

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Cui, Kahlil Fredrick, Gordon G. D. Zhou, and Lu Jing. "Mechanisms of size segregation in granular flows with different ambient fluids." EPJ Web of Conferences 249 (2021): 14015. http://dx.doi.org/10.1051/epjconf/202124914015.

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Particle size segregation is ubiquitous in granular systems with differently sized constituents but is found to diminish in the presence of viscous ambient fluids. We study this inhibiting effect through coupled fluid-particle numerical simulations. It is found that size segregation is indeed slower in the presence of fluid and this effect becomes more significant as fluid viscosity is increased. Direct calculation of segregation forcing terms reveal that the ambient fluids affect segregation in two major ways: buoyant forces reduce contact pressures, while viscous dissipation diminish particl

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N, B. Naduvinamani, and Kotreppa Koppa Bhagyashri. "Impact of Viscosity Variation on The Static and Dynamic Characteristics of Squeeze Film Lubrication of Rough Short Journal Bearing With Micropolar Fluid." Indian Journal of Science and Technology 18, no. 8 (2025): 595–607. https://doi.org/10.17485/IJST/v18i8.3402.

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<strong>Objectives:</strong> The theoretical examination of the impact of variation in viscosity of micropolar fluid lubricant on dynamic and static characteristics of rough short journal bearings lubrication with squeezing effect and to compare it with the performance of non-viscosity variation. <strong>Method:</strong> The mathematical model for the physical problem considered, modified stochastic Reynolds type equation assessing for variation in viscosity of micropolar fluid and structure of roughness on bearing surface is inferences by exploiting a random variable having sto

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Jin, Yong-Xin, De-Sheng Zhang, Xi Sheng, Lei Shi, Wei-Dong Shi, and Dao-Hong Wang. "Effect of molten salt properties on internal flow and disk friction loss of molten salt pump." Thermal Science 24, no. 4 (2020): 2347–56. http://dx.doi.org/10.2298/tsci2004347j.

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Computational fluid dynamics is used to study the effect of temperature on flow structure and disk friction loss for different working fluids in a high temperature molten salt pump, which is used for concentrating solar power, the velocity profile and pressure distribution in the first stage of the pump model and the effect of the fluid property on the ring leakage, disk friction loss as well as the shear stress distribution on shroud are analyzed for the pure water and the molten salt with temperature 300?C and 565?C respectively. The main findings can be concluded as: the working fluids have

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Singh, Udaya, Ram Gupta, and Vijay Kapur. "Effects of inertia in the steady state pressurised flow of a non-Newtonian fluid between two curvilinear surfaces of revolution: Rabinowitsch fluid model." Chemical and Process Engineering 32, no. 4 (2011): 333–49. http://dx.doi.org/10.2478/v10176-011-0027-1.

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Effects of inertia in the steady state pressurised flow of a non-Newtonian fluid between two curvilinear surfaces of revolution: Rabinowitsch fluid modelIn many practical situations fluids are normally blended with additives (viscosity index improvers, viscosity thickeners, viscosity thinners) due to which they show pseudoplastic and dilatant nature which can be modelled as cubic stress model (Rabinowitsch model). The cubic stress model for pseudoplastic fluids is adopted because Wada and Hayashi have shown that the theoretical results with this model are in good agreement with the experimenta

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Liu, Jianbin, Liguo Zhong, Tongchun Hao, and Yigang Liu. "Study on Flow Characteristics of Produced Fluid in Bohai Oilfield Cycle Steam Stimulated Heavy Oil Reservoir." IOP Conference Series: Earth and Environmental Science 966, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1755-1315/966/1/012006.

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Abstract It is helpful to better understand the flow state of produced fluid in different stages by studying the flow characteristics of produced fluid of cycle steam stimulation (CSS in short) heavy oil reservoirs from the reservoir to the wellhead, and to provide more research for the CSS replacement technologies for a clear direction. However, there are few studies on the flow state of produced fluids, and the mechanism understanding is not very clear. This article starts with laboratory experiments to study the factors that affect the fluidity of heavy oil in the Bohai Oilfield. It is foun

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Jiang, Feng, Dehua Chen, Xiao He, et al. "The Influence of Large Variations in Fluid Density and Viscosity on the Resonance Characteristics of Tuning Forks Simulated by Finite Element Method." Applied Sciences 14, no. 13 (2024): 5540. http://dx.doi.org/10.3390/app14135540.

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The use of tuning forks to measure fluid density and viscosity is widely employed in fields such as food, medicine, textiles, automobiles, petrochemicals, and deep drilling. The explicit analytical model based on the Euler–Bernoulli cantilever-beam theory for the relationship between tuning-fork resonance characteristics and the density and viscosity of fluid is only applicable to the situation where the fluid viscous effect is very small. In this paper, the finite element method is used to simulate the influence of large variations in fluid density and viscosity on the resonance characteristi

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Mitani, Yuya, Takahiro Yano, Takuyoh Hagi, Keiko Watanabe, and Koji Fukudome. "High-Speed impact experiment for evaluation of magnetorheological fluid’s shock-absorption performance." EPJ Web of Conferences 183 (2018): 04008. http://dx.doi.org/10.1051/epjconf/201818304008.

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Magnetorheological (MR) fluids are categorized as smart fluids, which are made of small iron particles suspended in carrier fluids such as silicone oil. The presence of a magnetic field will instantaneously increase the viscosity of the MR fluid, also known as the MR effect. The application of the MR fluid as viscous dampers to automobiles and buildings has shown excellent performance in shock absorption. To expand the practical application of the MR fluid, various evaluations of shock-absorption performance under high-loading conditions are needed. Therefore, we decided to investigate its per

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Franta, M., J. Málek, and K. R. Rajagopal. "On steady flows of fluids with pressure– and shear–dependent viscosities." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 461, no. 2055 (2005): 651–70. http://dx.doi.org/10.1098/rspa.2004.1360.

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There are many technologically important problems such as elastohydrodynamics which involve the flows of a fluid over a wide range of pressures. While the density of the fluid remains essentially constant during these flows whereby the fluid can be approximated as being incompressible, the viscosity varies significantly by several orders of magnitude. It is also possible that the viscosity of such fluids depends on the shear rate. Here we consider the flows of a class of incompressible fluids with viscosity that depends on the pressure and shear rate. We establish the existence of weak solutio

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