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Herschel–Bulkley fluid

About: Herschel–Bulkley fluid is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 49318 citations.


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Journal ArticleDOI
TL;DR: In this paper, the authors have discussed the mechanical properties of the slurry and the resistance of a sphere moving with uniform velocity in a slurry, and compared their theoretical results with the experimental data of Northwest Institute of Hydrotechnical Research and Institute of Hydraulic Research, Yellow River Conservancy Commission.
Abstract: It is commonly considered that the mechanical properties of the slurry are different from that of ordinary Newtonian fluid, and can be described by that of Bingham fluid. Hence its shearing stress should be described by the formula of the shearing stress of Bingham fluid. But the author holds the contrary opinion and firmly believes that the slurry is a highly viscous fluid with very long relaxation time such as those of asphalt, glass, etc. In this article, we have discussed the mechanical properties of the slurry and the resistance of a sphere moving with uniform velocity in the slurry. In the process of discussion, we use Stokes solution of the viscous fluid passing around a sphere. When the sphere is in equilibrium under the action of gravitational force, the force of buoyancy and the resistance, we get the velocity of sedimentation. When the velocity of sedimentation is equal to zero, we get the relation between the yield stress of Bingham fluid and the diameter of the particles which will not sink. The theoretical results calculated are compared with the experimental data of Northwest Institute of Hydrotechnical Research and Institute of Hydraulic Research, Yellow River Conservancy Commission. They are congruous.

1 citations

01 Jan 2013
TL;DR: In this paper, a new concept for obtaining shear stress based on fluid mechanics theory is presented for stress analysis of the creep deformations and behavior of fibrous thermoset amorphous polymeric composites subjected to an applied tensile axial load.
Abstract: A new concept for obtaining shear stress based on fluid mechanics theory is presented for stress analysis of the creep deformations and behavior of fibrous thermoset amorphous polymeric composites subjected to an applied tensile axial load. Shear stress is determined by simulation of plastic polymeric matrix flow (or metal matrix at high temperatures) and fluid flow, that is, creep of thermoset polymer matrix is simulated by fluid flow. Viscosity of crept amorphous polymeric matrix such as resin epoxy with respect to various temperatures is determined by exponential and polynomial functions approximately. Moreover shear stress is obtained by exponential, polynomial and logarithmic functions with the mentioned approach. A relationship is presented between shear stress in deformed amorphous polymeric matrix (Solids or metal matrix at high temperatures) and shear stress in fluids.

1 citations

Book ChapterDOI
R.P. King1
01 Jan 2002
TL;DR: The relationship between sheer stress and rate of strain of fluids can be measured in the laboratory and careful measurements can establish the rheological characteristics of any particular fluid.
Abstract: A Newtonian fluid is characterized by a linear relationship between the local shearing stress and the rate of strain within the moving fluid. Non-Newtonian fluids exhibit various types of nonlinearity. There are four types of non-Newtonian behaviors: Bingham plastic, Pseudoplastic, Newtonian, and Dilatant. These behaviors show how the rate of strain varies with the sheer stress that is applied to the fluid. The relationship between the local rate of deformation of the fluid and the shearing stress that is imposed differs from that which characterizes Newtonian fluids. This relationship is used to classify the flow behavious of various non-Newtonian fluids. The relationship between sheer stress and rate of strain of fluids can be measured in the laboratory and careful measurements can establish the rheological characteristics of any particular fluid. Dense slurries made from fine particles often behave as Bingham plastic at least approximately, and this is a useful model for these fluids. The Bingham plastic is an idealized model that can be used in theoretical calculations, but no real fluids ever behave exactly as a Bingham plastic.

1 citations

Journal ArticleDOI
TL;DR: In this article, a real-time experimental method to simultaneously measure the density and viscosity of the fluid is proposed and the effects of fluids on flexural vibration of the beam structure partially immersed in fluid are analyzed.
Abstract: Measurement of rheological properties of fluid using vibration of structure constrained by fluid. The fluid density and viscosity is the quantity to be measured and monitored during various manufacturing process. In this study, a real-time experimental method to simultaneously measure the density and viscosity of the fluid is proposed. The effects of fluids on flexural vibration of the beam structure partially immersed in fluid are analyzed. The density and viscosity have effects on the fluid-structure interaction. To analyze the fluid-structure interaction effects, the fluids are modeled as a simple support at one end of the beam. Using the proposed method, the density and viscosity of viscosity standard fluids were measured and its result was verified. The proposed method is advantageous in that the setup is possible to be installed in any fluid undergoing manufacturing process for real-time monitoring.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202341
202295
202117
202022
201920
201836