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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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02 Aug 2015
TL;DR: A mathematical model for electrically conducting flow of Herschelchelchel-bulkley fluid through a uniform tube of multiple stenoses has been studied in this article, where analytical solutions of resistance to the flow and wall shear stress have been calculated.
Abstract: A mathematical model for electrically conducting flow of Herschel-Bulkley fluid through a uniform tube of multiple stenoses has been studied. Analytical solutions of resistance to the flow and wall shear stress have been calculated. It is found that the resistance to the flow increases with the heights of the stenoses, power law index, volumetric flow rate, radius of the plug core-region and yield stress, but decreases with induced magnetic field and shear stress. It is also observed that the wall shear stress is increasing with the heights of the stenoses and radius of the plug core-region.
1 citations
24 Jul 2013
TL;DR: In this article, the influence of inertia forces on the pressure distribution is examined by using the method of averaged inertia terms of the momentum equation, and numerical examples of externally pressurized ERFs flows in the clearance between parallel disks and concentric spherical surfaces are presented.
Abstract: Many electrorheological fluids (ERFs) as fluids with microstructure demonstrate viscoplastic behaviours. Rheometric measurements indicate that some flows of these fluids may be modelled as the flows of a Herschel-Bulkley fluid. In this paper, the flow of a Herschel-Bulkley ER fluid—with a fractional power-law exponent—in a narrow clearance between two fixed surfaces of revolution with common axis of symmetry is considered. The flow is externally pressurized, and it is considered with inertia effect. In order to solve this problem, the boundary layer equations are used. The influence of inertia forces on the pressure distribution is examined by using the method of averaged inertia terms of the momentum equation. Numerical examples of externally pressurized ERFs flows in the clearance between parallel disks and concentric spherical surfaces are presented.
1 citations
TL;DR: In this paper, the authors investigated the behavior of a magnetic field in a viscous fluid cosmological model where the expansion θ in the model is proportional toσ11, the component of shear tensorσij, which leads to A=(Bc)n.
Abstract: We investigate the behavior of a magnetic field in a viscous fluid cosmological model where the expansionθ in the model is proportional toσ11, the component of shear tensorσij, which leads to A=(Bc)n. We also assume that the shear viscosity is proportional to the rate of expansion in the model. The behavior of the model in the absence of a magnetic field and viscosity is discussed as are some other physical and geometrical aspects.
1 citations
Journal Article•
TL;DR: In this paper, the effects of flow parameters on the velocity and temperature of a couple-stress fluid in contact with a Newtonian fluid in a channel bounded by permeable beds is studied.
Abstract: L aminar flow of a couple-stress fluid in contact with a Newtonian fluid in a channel bounded by permeable beds has been studied. The flow in the permeable beds is governed by Darcy’s law. The expressions for the velocity and temperature fields are obtained. The effects of flow parameters on the velocity and temperature are discussed in detail through graphs. It is observed that the velocity and temperature are increases with increasing Darcy number and Couple stress parameter.
1 citations