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Journal articles on the topic 'Pseudoplastic fluid'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Lim, Elaine, and Yew Mun Hung. "Long-wave evolution model of thermocapillary convection in an evaporating thin film of pseudoplastic fluids." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 12 (December 2, 2019): 4764–87. http://dx.doi.org/10.1108/hff-01-2019-0003.

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Purpose By solving a long-wave evolution model numerically for power-law fluids, the authors aim to investigate the hydrodynamic and thermal characteristics of thermocapillary flow in an evaporating thin liquid film of pseudoplastic fluid. Design/methodology/approach The flow reversal attributed to the thermocapillary action is manifestly discernible through the streamline plots. Findings The thermocapillary strength is closely related to the viscosity of the fluid, besides its surface tension. The thermocapillary flow prevails in both Newtonian and pseudoplastic fluids at a large Marangoni number and the thermocapillary effect is more significant in the former. The overestimate in the Newtonian fluid is larger than that in the pseudoplastic fluid, owing to the shear-thinning characteristics of the latter. Originality/value This study provides insights into the essential attributes of the underlying flow characteristics in affecting the thermal behavior of thermocapillary convection in an evaporating thin liquid film of the shear-thinning fluids.

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2

Singh, Udaya P., and Ram S. Gupta. "Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model." Advances in Tribology 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/571036.

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The use of additives (polyisobutylene, ethylene-propylene, lithium hydroxy stearate, hydrophobic silica, etc.) changes lubricants’ rheology due to which they show pseudoplastic and dilatant nature, which can be modelled as cubic stress fluid model (Rabinowitsch fluid model). The present theoretical analysis investigates the effects of non-Newtonian pseudoplastic and dilatant lubricants on the squeezing characteristics of a sphere and a flat plate. The modified Reynolds equation has been derived and an asymptotic solution for film pressure is obtained. The results for the film pressure distribution, load carrying capacity, and squeezing time characteristics have been calculated for various values of pseudoplastic parameter and compared with the Newtonian results. These characteristics show a significant variation with the non-Newtonian pseudoplastic and dilatant behavior of the fluids.

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3

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 (December 1, 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 experimental results. The present theoretical analysis is to investigate the pseudoplastic effect along with the effect of rotational inertia on the pressure distribution, frictional torque and fluid flow rate of externally pressurised flow in narrow clearance between two curvilinear surfaces of revolution. The expression for pressure has been derived using energy integral approach. To analyse and discuss the effects of pseudoplasticity and fluid inertia on the pressure distribution, fluid flow rate and frictional torque, the examples of externally pressurised flow in the clearance between parallel disks and concentric spherical surfaces have been considered.

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4

Saravana, R., K. Vajravelu, and S. Sreenadh. "Influence of Compliant Walls and Heat Transfer on the Peristaltic Transport of a Rabinowitsch Fluid in an Inclined Channel." Zeitschrift für Naturforschung A 73, no. 9 (September 25, 2018): 833–43. http://dx.doi.org/10.1515/zna-2018-0181.

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AbstractIn this paper, we investigate the peristaltic pumping of a Rabinowitsch fluid in an inclined channel under the effects of heat transfer and flexible compliant walls. The expressions for the velocity, the temperature and the coefficient of the heat transfer are obtained. The influence of emerging parameters on the velocity, the temperature, the coefficient of heat transfer and the trapping phenomenon of the Newtonian, dilatant and pseudoplastic fluid models are also analyzed graphically. We find that the velocity and the temperature fields decrease for shear thickening fluid; but the velocity and temperature fields of the shear thinning, and Newtonian fluids increase with an increase in the angle of inclination. Furthermore, there were more trapping boluses occurring for the Newtonian fluid case as compared to the pseudoplastic and dilatant fluids cases. However, as the angle of inclination increases, the size of trapping bolus decreases.

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5

Pratap Singh, Udaya. "Application of Rabinowitsch Fluid Model to Pivoted Curved Slider Bearings." Archive of Mechanical Engineering 60, no. 2 (June 1, 2013): 247–67. http://dx.doi.org/10.2478/meceng-2013-0016.

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In the present theoretical analysis, the combined effects of slider curvature and non-Newtonian pseudoplastic and dilatant lubricants (lubricant blended with viscosity index improver) on the steady and dynamic characteristics of pivoted curved slider bearings have been investigated for Rabinowitsch fluid model. The modified Reynolds equations have been obtained for steady and damping states of bearing. To solve the modified Reynolds equations, perturbation theory has been adopted. The results for the steady state characteristics (steady state film pressure, load carrying capacity and centre of pressure) and dynamic characteristics (dynamic damping and dynamic stiffness) have been calculated numerically for various values of viscosity index improver using Mathematica. In comparison with the Newtonian lubricants, higher values of film pressure, load carrying capacity, dynamic damping and dynamic stiffness have been obtained for dilatant lubricants, while the case was reversed for pseudoplastic lubricants. Significant variations in the bearing characteristics have been observed for even small values of pseudoplastic parameter, that is, with the non-Newtonian dilatant and pseudoplastic behaviour of the fluid.

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6

Tahir, Muhammad, and Adeel Ahmad. "Impact of pseudoplaticity and dilatancy of fluid on peristaltic flow and heat transfer: Reiner-Philippoff fluid model." Advances in Mechanical Engineering 12, no. 12 (December 2020): 168781402098118. http://dx.doi.org/10.1177/1687814020981184.

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The objective of this article is to investigate the impact of pseudoplaticity and dilatancy of fluid on peristaltic flow and heat transfer of non-Newtonian fluid in a non-uniform asymmetric channel. The mathematical-model incorporates the non-linear implicit stress deformation relation using the classical Reiner-Philippoff viscosity model, which is one of the very few non-Newtonian models exhibiting all the pseudoplastic, dilatant and Newtonian behaviors. The governing equations for the peristaltic flow and heat transfer of Reiner-Philippoff fluid are modeled using the low Reynolds-number and long wavelength approximation. Results of the study are presented graphically to discuss the impact of pseudoplaticity and dilatancy of fluid on the velocity, pressure gradient, bolus movement and temperature profile. The article is concluded with key observations that by increasing the value of the Reiner-Philippoff fluid parameter the velocity of fluid increase at the center of the channel and decreases near the boundaries of the channel. Effects of the shear stress parameter are opposite on pseudoplastic and dilatants fluid. By increasing the value of the shear stress parameter the velocity of the pseudoplastic fluid increases near the center of the channel, whereas the velocity of dilatants fluid decreases.

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7

Kadyirov, A. I., and B. R. Abaydullin. "Vortex Breakdown under Laminar Flow of Pseudoplastic Fluid." Journal of Physics: Conference Series 899 (September 2017): 022009. http://dx.doi.org/10.1088/1742-6596/899/2/022009.

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8

Dongxue, Li, Su Yufeng, Xia Weiwei, Liu Chaoran, Wang Wen, Wang Pan, and Duan Zhiyong. "Analysis of slumping on nanoimprint patterning with pseudoplastic metal nanoparticle fluid." RSC Adv. 4, no. 57 (2014): 30402–11. http://dx.doi.org/10.1039/c4ra01138d.

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9

Humberto Escobar, Freddy, Javier-Andrés Martínez, and Luis-Fernando Bonilla. "Transient pressure analysis for vertical wells with spherical power-law flow." CT&F - Ciencia, Tecnología y Futuro 5, no. 1 (November 30, 2012): 19–36. http://dx.doi.org/10.29047/01225383.216.

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Heavy oil is considered nowadays as one of the unconventional reservoirs of main interest in the oil industry. Some of them display non-Newtonian pseudoplastic behavior which mathematical modeling differs from the conventional case and, therefore, the flow regimes display some particular behaviors.Fracturing fluids, foams, some fluids for Enhanced Oil Recovery (EOR) and drilling muds can also fall into this category. The spherical/hemispherical flow mainly caused by partial completion/penetration deserves a particular treatment for pseudoplastic flow. A single research for this case was found in the literature to introduce only its mathematical model. The pressure and pressure derivative behavior of spherical/hemispherical flow behavior of a slightly compressible, non-Newtonian power-law fluid (pseudoplastic) is studied in this work and conventional and Tiab’s Direct Synthesis (TDS) methodologies are extended for well test interpretation purposes. For pseudoplastic spherical/ hemispherical flow, the slope of the pressure derivative is no longer -½, besides it changes with the value of flow behavior index n, which indicates that the interpretation of pressure data for the dealt systems through the use of traditional methods should not be accurate. New Equations are introduced to estimate spherical/ hemispherical permeability and spherical/hemispherical skin factor for the systems under consideration. The Equations were successfully verified by its application to synthetic cases.

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10

Ayoubi Ayoubloo, Kasra, Mohammad Ghalambaz, Taher Armaghani, Aminreza Noghrehabadi, and Ali J. Chamkha. "Pseudoplastic natural convection flow and heat transfer in a cylindrical vertical cavity partially filled with a porous layer." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 3 (September 30, 2019): 1096–114. http://dx.doi.org/10.1108/hff-06-2019-0464.

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Purpose This paper aims to theoritically investigate the free convection flow and heat transfer of a non-Newtonian fluid with pseudoplastic behavior in a cylindrical vertical cavity partially filled with a layer of a porous medium. Design/methodology/approach The non-Newtonian behavior of the pseudoplastic liquid is described by using a power-law non-Newtonian model. There is a temperature difference between the internal and external cylinders. The porous layer is attached to the internal cylinder and has a thickness of D. Upper and lower walls of the cavity are well insulated. The governing equations are transformed into a non-dimensional form to generalize the solution. The finite element method is used to solve the governing equations numerically. The results are compared with the literature results in several cases and found in good agreement. Findings The influence of the thickness of the porous layer, Rayleigh number and non-Newtonian index on the heat transfer behavior of a non-Newtonian pseudoplastic fluid is addressed. The increase of pseudoplastic behavior and increase of the thickness of the porous layer enhances the heat transfer. By increase of the porous layer from 0.6 to 0.8, the average Nusselt number increased from 0.15 to 0.25. The increase of non-Newtonian effects (decrease of the non-Newtonian power-law index) enhances the heat transfer rate. Originality/value The free convection behavior of a pseudoplastic-non-Newtonian fluid in a cylindrical enclosure partially filled by a layer of a porous medium is addressed for the first time.

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11

Rahmani, Ramin K., Theo G. Keith, and Anahita Ayasoufi. "Numerical Simulation and Mixing Study of Pseudoplastic Fluids in an Industrial Helical Static Mixer." Journal of Fluids Engineering 128, no. 3 (October 3, 2005): 467–80. http://dx.doi.org/10.1115/1.2174058.

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Static mixers are increasingly being used to perform a variety of mixing tasks in industries, ranging from simple blending to complex multiphase reaction systems. Use of static mixers to process non-Newtonian fluids is quite common. Data on the pressure drop of non-Newtonian fluids in static mixers and the degree of mixing of materials through the mixer are very useful in the design and engineering application of these tools. This paper extends a previous study by the authors on an industrial helical static mixer and illustrates how static mixing processes of single-phase viscous liquids can be simulated numerically. A further aim is to provide an improved understanding of the flow pattern of pseudoplastic liquids through the mixer. A three-dimensional finite volume simulation is used to study the performance of the mixer. The flow velocities, pressure drops, etc., are calculated for various flow rates, using the Carreau and the power law models for non-Newtonian fluids. The numerical predictions by these two models are compared to existing experimental data. Also, a comparison of the mixer performance for both Newtonian and pseudoplastic fluids is presented. The effects of the Reynolds number of the flow and also properties of pseudoplastic fluids on the static mixer performance have been studied. It is shown that for the materials studied here, the fluid type is not effective on the degree of mixing. It is also shown that the fluid type has a major impact on the pressure drop across the mixer.

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12

Luan, De Yu, Shen Jie Zhou, and Hu Duan. "Research on Mechanism of Fluid Flow Characteristics in a Stirred Tank with Stirrer Composed of Perturbed Six-Bent-Bladed Turbine." Applied Mechanics and Materials 543-547 (March 2014): 85–89. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.85.

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The power consumption and pressure distribution of Newtonian fluid and pseudoplastic fluid in a stirred tank with stirrer composed of perturbed six-bent-bladed turbine (6PBT) were calculated by CFD combined with laminar viscosity model. The test liquid used were glycerine and 1.25% (wt) xanthan gum solution, a pseudoplastic fluid with a yield stress. Compared with the stirrer composed of six-bent-bladed turbine (6BT), the effects of the 6PBT impeller on fluid pressure distribution were extensively analyzed, and the Coriolis force role of strengthening swirling motion and efficient agitation mechanism of 6PBT impeller were made a thorough inquiry, respectively. Results show that 6PBT impeller can lead to an energy saving effect as the increasing speed, and generate a larger low pressure region in flow field at the same time, so this is more beneficial to the whole circulation. Moreover, the stronger swirling motion may emerge in stirred tank with 6PBT impeller under the action of Coriolis force, which is exceedingly advantageous to promotion of mixing efficiency. As a result, 6PBT impeller is found to have a obvious superiority on mixing process of pseudoplastic fluid. The research results provide valuable references and instructions for the development of new type impeller.

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13

Lin, Ming Che. "Stability Analysis of a Thin Pseudoplastic Fluid with Condensation Effects Flowing on a Rotating Circular Disk." Advanced Materials Research 699 (May 2013): 413–21. http://dx.doi.org/10.4028/www.scientific.net/amr.699.413.

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This paper investigates the linear stability of a thin axisymmetric pseudoplastic fluid with condensation effects flowing on a rotating circular disk. Long-wave perturbation analysis is proposed to derive a generalized kinematic model of the physical system with a small Reynolds number. The method of normal mode is applied to study the linear stability. The neutral stability curve and the linear growth rate are obtained subsequently as the by-products of linear solution. The study reveals that the rotation number generates a destabilizing effect in pseudoplastic fluid. The degree of the flow index n plays a vital role in stabilizing the film flow.

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14

Hu, Fan Jin, Shen Jie Zhou, Feng Ling Yang, and Lei Shi. "CFD Study of the Mixing of Pseudoplastic Fluids with Yield Stress in a Two-Staged Stirred Tank." Advanced Materials Research 354-355 (October 2011): 604–8. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.604.

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The 3D flow field generated by two-stage impellers in the agitation of xanthan gum, a pseudoplastic fluid with yield stress, was simulated using the commerical CFD package. The effect of impeller speed and impeller spacing on power number, cavern size and viscosity distribution was investigated in this work. The results showed that the power number was slightly influenced by impeller spacing. Higher impeller speed and larger impeller spacing contributed to creation of a bigger cavern. The range of high viscosity zone between the impellers increased with an increase in impeller spacing. Impeller speed and impeller spacing could be used as important parameters to improve the mixing performance of multi-stage impellers in the mixing of pseudoplastic fluids with yield stress.

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15

Şahin, Serpil, and Hüseyin Demir. "Numerical Solution of Natural Convective Heat Transfer Under Magnetic Field Effect." Acta Mechanica et Automatica 13, no. 1 (March 1, 2019): 23–29. http://dx.doi.org/10.2478/ama-2019-0004.

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Abstract In this study, non-Newtonian pseudoplastic fluid flow equations for 2-D steady, incompressible, the natural convective heat transfer are solved numerically by pseudo time derivative. The stability properties of natural convective heat transfer in an enclosed cavity region heated from below under magnetic field effect are investigated depending on the Rayleigh and Chandrasekhar numbers. Stability properties are studied, in particular, for the Rayleigh number from 104 to 106 and for the Chandrasekhar number 3, 5 and 10. As a result, when Rayleigh number is bigger than 106 and Chandrasekhar number is bigger than 10, the instability occurs in the flow domain. The results obtained for natural convective heat transfer problem are shown in the figures for Newtonian and pseudoplastic fluids. Finally, the local Nusselt number is evaluated along the bottom wall.

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16

Xia Wei-Wei, Zheng Guo-Heng, Li Tian-Hao, Liu Chao-Ran, Li Dong-Xue, and Duan Zhi-Yong. "Factors influencing filling degree in nanoimprint lithography with pseudoplastic fluid." Acta Physica Sinica 62, no. 18 (2013): 188105. http://dx.doi.org/10.7498/aps.62.188105.

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17

JIANG, Shaokun, Youguang MA, Wenyuan FAN, Ke YANG, and Huaizhi LI. "Chaotic Characteristics of Bubbles Rising with Coalescences in Pseudoplastic Fluid." Chinese Journal of Chemical Engineering 18, no. 1 (February 2010): 18–26. http://dx.doi.org/10.1016/s1004-9541(08)60317-1.

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18

Dolejš, Václav, Petr Mikulášek, and Petr Doleček. "Approximate Solution of Momentum Transfer in System Generalized Newtonian Fluid-Fluidized Bed of Spherical Particles Using Modified Rabinowitsch-Mooney Equation." Collection of Czechoslovak Chemical Communications 60, no. 8 (1995): 1281–96. http://dx.doi.org/10.1135/cccc19951281.

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The modified Rabinowitsch-Mooney equation together with the corresponding relations for consistency variables has been adopted for approximate solution of momentum transfer between generalized Newtonian fluid with laminar flow and surface of fluidized bed of spherical particles inclusive of wall surface. The solution has been concretized for a fluid characterized by power-law and Ellis flow models in the creeping flow region. The range of values of ratios of particle diameter to column diameter and that of porosity values e in which the suggested relation satisfactorily agrees with experimental results for pseudoplastic fluids have been delimitated experimentally.

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19

Zhikang, Fan, Liang Shuhua, Xue Xu, and Wang Gang. "Rheological Properties of an Electrorheological Fluid in Original Transition Zone." International Journal of Modern Physics B 13, no. 14n16 (June 30, 1999): 1893–900. http://dx.doi.org/10.1142/s0217979299001934.

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The rheological properties of an electrorheological(ER) fluid have been studied in a modified concentric cylinder viscometer. The results show that the relation of shear rate and shear stress is non-linear at certain shear rate defined as an original transition zone. Regressive analysis reveals that the ER fluid is of yield-pseudoplastic fluid in the transition zone. With increase in applied fields, the rheological properties of the ER fluid deviates from Newtonian fluid and the length of the transition zone becomes longer.

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20

Noreen, Saima, Tasawar Hayat, and Ahmed Alsaedi. "Magnetohydrodynamic Peristaltic Flow of a Pseudoplastic Fluid in a Curved Channel." Zeitschrift für Naturforschung A 68, no. 5 (May 1, 2013): 380–90. http://dx.doi.org/10.5560/zna.2013-0003.

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A mathematical model is developed to examine the effects of an induced magnetic field on the peristaltic flow in a curved channel. The non-Newtonian pseudoplastic fluid model is used to depict the combined elastic and viscous properties. The analysis has been carried out in the wave frame of reference, long wavelength and low Reynolds scheme are implemented. A series solution is obtained through perturbation analysis. Results for stream function, pressure gradient, magnetic force function, induced magnetic field, and current density are constructed. The effects of significant parameters on the flow quantities are sketched and discussed.

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21

Perminov, A. V., and T. P. Lyubimova. "Stability of thermovibrational convection of pseudoplastic fluid in plane vertical layer." Computational Continuum Mechanics 10, no. 1 (2017): 78–89. http://dx.doi.org/10.7242/1999-6691/2017.10.1.7.

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22

Yao, Lun-Shin, Md Mamun Molla, and S. Ghosh Moulic. "Fully-Developed Circular-Pipe Flow of a Non-Newtonian Pseudoplastic Fluid." Universal Journal of Mechanical Engineering 1, no. 2 (August 2013): 23–31. http://dx.doi.org/10.13189/ujme.2013.010201.

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23

Liu, Junhong, Lin Ye, and Hesheng Liu. "Flow patterns of flow boiling of a highly viscous pseudoplastic fluid." International Communications in Heat and Mass Transfer 22, no. 3 (May 1995): 359–67. http://dx.doi.org/10.1016/0735-1933(95)00027-v.

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24

Junhong, Liu, Ye Lin, Liu Hesheng, and Cui Bo. "Flow boiling of a highly viscous pseudoplastic fluid in vertical tubes." Chemical Engineering and Processing: Process Intensification 34, no. 4 (August 1995): 385–89. http://dx.doi.org/10.1016/0255-2701(94)00561-3.

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25

Nikulina, S. A., A. V. Perminov, and T. P. Lyubimova. "Thermal vibrational convection of a pseudoplastic fluid in a rectangular cavity." Вестник Пермского университета. Физика, no. 3 (2020): 14–23. http://dx.doi.org/10.17072/1994-3598-2020-3-14-23.

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Thermal vibrational convection of a pseudoplastic fluid in a closed rectangular cavity, which is in zero gravity and performing longitudinal high-frequency linearly polarized vibrations, is studied. The temperature gradient is perpendicular to the direction of vibration. The system of equations of thermovibrational convection of a Williamson pseudoplastic fluid is given. The problem was solved by the finite difference method. The effect of vibrations on the structure and intensity of flows is investigated. The magnitude of the vibrational effect on the liquid was determined by the vibrational Grashof number. The dependences of the maximum of the stream function and the Nusselt number, which determines the heat flux through the boundary of the cavity, on the vibrational Grashof number are obtained. The threshold values of the vibrational Grashof number and the Nusselt number corresponding to a change in the flow regime are determined. At small values of the Grashof vibration number in the cavity, a slow four-vortex symmetric flow is observed. With an increase in the vibrational impact, an intense three-vortex motion arises in the cavity, which transforms into five vortex-like motion. For the five vortex flows, there exists the region of Grashof vibration numbers, where this flow is oscillatory in nature. With increasing degree of non-Newtonian fluid, initially periodic oscillations become chaotic.

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26

Kariyama, Ibrahim Denka, Xiaodong Zhai, and Binxin Wu. "Physical and Rheological Properties of Animal Manure: A Review." Transactions of the ASABE 61, no. 3 (2018): 1113–20. http://dx.doi.org/10.13031/trans.12768.

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Abstract. This literature review was conducted on the physical and rheological properties of animal manure slurries and their applications. The review revealed the importance of these properties in the design of anaerobic treatment plants, pipe systems to transport slurries to treatment and storage units, and other applications and management of raw and treated slurries. The selection of pumping and mixing equipment and their power requirements, the flow behavior, mass, and heat transfer, the quality of mixing, pressure head loss, and other applications of manure slurries are affected by the physical and rheological properties. The review shows that manure slurries generally exhibit non-Newtonian pseudoplastic fluid behavior with a decreasing apparent viscosity as the shear rate increases and that the power law equation can successfully be used to describe the relationship between shear stress and shear rate, especially for low total solids concentrations. Keywords: Animal manure slurries, Apparent viscosity, Non-Newtonian pseudoplastic fluids, Power law equation, Rheological properties.

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27

Lin, Ming Che, Chun I. Chen, and Shou Jen Huang. "Weakly Nonlinear Stability Analysis of a Thin Power-Law Fluid during Spin Coating." Applied Mechanics and Materials 319 (May 2013): 90–95. http://dx.doi.org/10.4028/www.scientific.net/amm.319.90.

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The weakly nonlinear stability of a thin Ostwald de-Waele power-law fluid during spin coating is investigated. Long-wave perturbation analysis is proposed to derive a generalized kinematic model of the physical system with a small Reynolds number. The study reveals that the rotation number generates a destabilizing effect either in pseudoplastic fluid or in dilatant fluid. Further, it is shown that the degree of power-law index n plays a vital role in stabilizing the film flow.

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28

Walicka, A. "Simple Flows of Pseudoplastic Fluids Based on Dehaven Model." International Journal of Applied Mechanics and Engineering 22, no. 4 (December 20, 2017): 1035–44. http://dx.doi.org/10.1515/ijame-2017-0066.

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Abstract In this paper three simple flows of visco-plastic fluids of DeHaven type or fluids similar to them are considered. These flows are: Poiseuille flow in a plane channel, Poiseuille flow through a circular pipe and rotating Couette flow between two coaxial cylinders. After presentation DeHaven model it was presented some models of fluids similar to this model. Next it was given the solutions of equations of motion for three flows mentioned above.

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29

Felder, E., and C. Levrau. "Analysis of the lubrication by a pseudoplastic fluid: Application to wire drawing." Tribology International 44, no. 7-8 (July 2011): 845–49. http://dx.doi.org/10.1016/j.triboint.2011.02.009.

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30

Liu, Junhong, Lin Ye, and Hesheng Liu. "Critical heat flux of flow boiling in a highly viscous pseudoplastic fluid." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 28, no. 2 (1995): 210–11. http://dx.doi.org/10.1252/jcej.28.210.

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31

Aguirre, A., E. Castillo, M. Cruchaga, R. Codina, and J. Baiges. "Pseudoplastic fluid flows for different Prandtl numbers: Steady and time-dependent solutions." International Journal of Thermal Sciences 145 (November 2019): 106022. http://dx.doi.org/10.1016/j.ijthermalsci.2019.106022.

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32

Bocharov, O. B., and Ya S. Ignatenko. "Force acting on a particle in unsteady flow of a pseudoplastic fluid." Journal of Applied Mechanics and Technical Physics 57, no. 6 (November 2016): 1069–75. http://dx.doi.org/10.1134/s0021894416060146.

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33

Luan, Deyu, Yiming Chen, Hong Wang, Zhaorui Wang, Songsong Wang, and Longbin Li. "Cavern Boundary Determination with Pseudoplastic Fluid Based on the Apparent Viscosity Method." Chemical Engineering & Technology 43, no. 9 (June 3, 2020): 1726–32. http://dx.doi.org/10.1002/ceat.201800446.

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34

Matvienko, O. V., V. P. Bazuev, and N. K. Yuzhanova. "Mathematical simulation of a twisted pseudoplastic fluid flow in a cylindrical channel." Journal of Engineering Physics and Thermophysics 84, no. 3 (May 2011): 589–93. http://dx.doi.org/10.1007/s10891-011-0509-5.

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35

Akbar, Noreen Sher, and S. Nadeem. "Blood flow analysis in tapered stenosed arteries with pseudoplastic characteristics." International Journal of Biomathematics 07, no. 06 (November 2014): 1450065. http://dx.doi.org/10.1142/s179352451450065x.

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In this paper, the blood flow through a tapered artery with a stenosis by considering axially non-symmetric but radially symmetric mild stenosis on blood flow characteristics is analyzed, assuming the flow is steady and blood is treated as Williamson fluid. Perturbation solutions have been evaluated for velocity, resistance impedance, wall shear stress and shearing stress at the stenosis throat. The graphical results of different type of tapered arteries (i.e. converging tapering, diverging tapering, non-tapered artery) have been examined for different parameters of interest.

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36

Maazioui, Souhail, Abderrahim Maazouz, Fayssal Benkhaldoun, Driss Ouazar, and Khalid Lamnawar. "Rheological Characterization of a Concentrated Phosphate Slurry." Fluids 6, no. 5 (May 2, 2021): 178. http://dx.doi.org/10.3390/fluids6050178.

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Phosphate ore slurry is a suspension of insoluble particles of phosphate rock, the primary raw material for fertilizer and phosphoric acid, in a continuous phase of water. This suspension has a non-Newtonian flow behavior and exhibits yield stress as the shear rate tends toward zero. The suspended particles in the present study were assumed to be noncolloidal. Various grades and phosphate ore concentrations were chosen for this rheological investigation. We created some experimental protocols to determine the main characteristics of these complex fluids and established relevant rheological models with a view to simulate the numerical flow in a cylindrical pipeline. Rheograms of these slurries were obtained using a rotational rheometer and were accurately modeled with commonly used yield-pseudoplastic models. The results show that the concentration of solids in a solid–liquid mixture could be increased while maintaining a desired apparent viscosity. Finally, the design equations for the laminar pipe flow of yield pseudoplastics were investigated to highlight the role of rheological studies in this context.

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Marum, Daniela Martins, Maria Diná Afonso, and Brian Bernardo Ochoa. "Rheological behavior of a bentonite mud." Applied Rheology 30, no. 1 (January 1, 2020): 107–18. http://dx.doi.org/10.1515/arh-2020-0108.

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Abstract Predicting drilling fluids rheology is crucial to control/optimize the drilling process and the gas extraction from drilling fluids in logging systems. A Couette viscometer measured the apparent viscosity of a bentonite mud at various shear rates and temperatures. The bentonite mud behaved as a yield-pseudoplastic fluid, and a modified Herschel-Bulkley model predicted the shear rate and temperature effects upon the shear stress. A pipe viscometer was built to seek a correlation between the mud flow rate and the pressure drop and thereby determine refined Herschel-Bulkley parameters. Coupling a rheological model to a pipe viscometer enables the continuous acquisition of apparent viscosities of Newtonian or non-Newtonian fluids at a rig-site surface.

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Haige, Wang, and Liu Xisheng. "Study on steady surge pressure for Yield-Pseudoplastic fluid in a concentric annulus." Applied Mathematics and Mechanics 17, no. 1 (January 1996): 15–23. http://dx.doi.org/10.1007/bf00131290.

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Perminov, A. V., and T. P. Lyubimova. "Stability of Thermovibrational Convection of a Pseudoplastic Fluid in a Plane Vertical Layer." Journal of Applied Mechanics and Technical Physics 59, no. 7 (December 2018): 1167–78. http://dx.doi.org/10.1134/s0021894418070118.

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Ma, Kun, Shiwei Yuan, Huaijian Chang, and Huanxin Lai. "Experimental study of pseudoplastic fluid flows in a square duct of strong curvature." Journal of Thermal Science 23, no. 4 (July 18, 2014): 359–67. http://dx.doi.org/10.1007/s11630-014-0718-2.

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41

Gratão, A. C. A., V. Silveira, and J. Telis-Romero. "Laminar forced convection to a pseudoplastic fluid food in circular and annular ducts." International Communications in Heat and Mass Transfer 33, no. 4 (April 2006): 451–57. http://dx.doi.org/10.1016/j.icheatmasstransfer.2006.01.006.

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42

Naz, Rahila, Mughira Noor, Zahir Shah, Muhammad Sohail, Poom Kumam, and Phatiphat Thounthong. "Entropy generation optimization in MHD pseudoplastic fluid comprising motile microorganisms with stratification effect." Alexandria Engineering Journal 59, no. 1 (February 2020): 485–96. http://dx.doi.org/10.1016/j.aej.2020.01.018.

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43

Matvienko, O. V., V. P. Bazuev, and A. E. Aseeva. "Mathematical Modeling of Swirling Herschel–Bulkley Pseudoplastic Fluid Flow in a Cylindrical Channel." Journal of Engineering Physics and Thermophysics 92, no. 1 (January 2019): 208–18. http://dx.doi.org/10.1007/s10891-019-01923-9.

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44

Luan, Deyu, Yiming Chen, Hong Wang, Yue Wang, and Xing Wei. "Chaotic characteristics of pseudoplastic fluid induced by 6PBT impeller in a stirred vessel." Chinese Journal of Chemical Engineering 27, no. 2 (February 2019): 293–97. http://dx.doi.org/10.1016/j.cjche.2018.06.001.

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45

Pakzad, Leila, Farhad Ein-Mozaffari, and Philip Chan. "Using computational fluid dynamics modeling to study the mixing of pseudoplastic fluids with a Scaba 6SRGT impeller." Chemical Engineering and Processing: Process Intensification 47, no. 12 (November 2008): 2218–27. http://dx.doi.org/10.1016/j.cep.2007.12.003.

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46

Escobar, Freddy-Humberto, Angela-Patricia Zambrano, Diana-Vanessa Giraldo, and José-Humberto Cantillo. "Pressure and pressure derivative analysis for non-newtonian pseudoplastic fluids in double-porosity formations." CT&F - Ciencia, Tecnología y Futuro 4, no. 3 (May 24, 2011): 47–60. http://dx.doi.org/10.29047/01225383.238.

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Non-Newtonian fluids are often used during various drilling, workover and enhanced oil recovery processes. Most of the fracturing fluids injected into reservoir-bearing formations possess non-Newtonian nature and these fluids are often approximated by Newtonian fluid flow models. In the field of well testing, several analytical and numerical models taking into account Bingham, pseudoplastic and dilatant non-Newtonian behavior have been introduced in the literature to study their transient nature in porous media for a better reservoir characterization. Most of them deal with fracture wells and homogeneous formations and well test interpretation is conducted via the straight-line conventional analysis or type-curve matching. Only a few studies consider the pressure derivative analysis. However, there exists a need of a more practical and accurate way of characterizing such systems. So far, it does not exist any methodology to characterize heterogeneous formation bearing non-Newtonian fluids through of well test analysis. In this study, an interpretation methodology using the pressure and pressure derivative log-log plot is presented for non-Newtonian fluids in naturally fractured formations, so the dimensionless fracture storativity ratio, ω, and interporosity flow parameter, λ, are obtained from characteristics points found on such plot. The developed equations and correlations are successfully verified by their application only to synthetic well test data since no actual field data are available. A good match is found between the results provided by the proposed technique and the values used to generate the simulated data.

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Hsu, Cheng-Hsing, Jaw-Ren Lin, Lian-Jong Mou, and Chia-Chuan Kuo. "Squeeze film characteristics of conical bearings operating with non-Newtonian lubricants – Rabinowitsch fluid model." Industrial Lubrication and Tribology 66, no. 3 (April 8, 2014): 373–78. http://dx.doi.org/10.1108/ilt-01-2012-0008.

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Purpose – The purpose of this paper is to present a theoretical study of non-Newtonian effects in conical squeeze-film plates that is based on the Rabinowitsch fluid model. Design/methodology/approach – A non-linear, modified Reynolds equation accounting for the non-Newtonian properties following the cubic stress law equation is derived. Through a small perturbation method, first-order closed-form solutions are obtained. Findings – It is found that the non-Newtonian properties of dilatant fluids increase the load capacity and lengthen the response time as compared to the case using a Newtonian lubricant; however, the non-Newtonian behaviors of pseudoplastic lubricants result in reverse influences. Originality/value – Numerical tables for squeeze-film loads of conical plates are also provided for engineering applications.

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Ng, Moses L., and J. P. Hartnett. "Free convection heat transfer from horizontal wires to pseudoplastic fluids." International Journal of Heat and Mass Transfer 31, no. 2 (February 1988): 441–47. http://dx.doi.org/10.1016/0017-9310(88)90026-9.

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Azhar, Ehtsham, Z. Iqbal, and E. N. Maraj. "Impact of Entropy Generation on Stagnation-Point Flow of Sutterby Nanofluid: A Numerical Analysis." Zeitschrift für Naturforschung A 71, no. 9 (September 1, 2016): 837–48. http://dx.doi.org/10.1515/zna-2016-0188.

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AbstractThe present article dicusses the computational analysis of entropy generation for the stagnation-point flow of Sutterby nanofluid over a linear stretching plate. The Sutterby fluid is chosen to study the effect for three major classes of non-Newtonian fluids, i.e. pseudoplastic, Newtonian, and dilatant. The effects of pertinent physical parameters are examined under the approximation of boundary layer. The system of coupled nonlinear partial differential equations is simplified by incorporating suitable similarity transformation into a system of non-linear-coupled ordinary differential equations. Entropy generation analysis is conducted numerically, and the results are displayed through graphs and tables. Significant findings are listed in the closing remarks.

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Hayat, T., R. Iqbal, A. Tanveer, and A. Alsaedi. "Variable Viscosity Effect on MHD Peristaltic Flow of Pseudoplastic Fluid in a Tapered Asymmetric Channel." Journal of Mechanics 34, no. 3 (November 22, 2016): 363–74. http://dx.doi.org/10.1017/jmech.2016.111.

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AbstractInfluence of variable viscosity the peristaltic flow of pseudoplastic fluid in a tapered channel is discussed. The effects of magnetohydrodynamics (MHD) are also studied. Asymmetric channel is considered. The relevant problem is first formulated and then non-dimensionalized. The nonlinear different system subject to lubrication approach is solved. Expressions for pressure gradient, pressure rise and velocity are constructed. Graphs reflecting the variations of sundry parameters on pressure rise and velocity are examined. Trapping and pumping phenomena are also studied.

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