Topic
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 May 1985
TL;DR: In this article, an in-line, noninvasive device and method for calculation of consistency of non-Newtonian fluid flowing in a laminar manner through a non-rotating conduit where the consistency is calculated directly from a power-law model equation employing as independent variables pressure head loss over a specific distance and the bulk velocity of the fluid.
Abstract: Provided herein is an in-line, non-invasive device and method for calculation of consistency of a non-Newtonian fluid flowing in a laminar manner through a non-rotating conduit where the consistency is calculated directly from a power-law model equation employing as independent variables pressure head loss over a specific distance and the bulk velocity of the fluid.
45 citations
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TL;DR: It is observed that the peristalsis works as a pump against greater pressure in two-layered model with a porous medium compared with a viscous fluid in the peripheral layer.
45 citations
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TL;DR: In this paper, the poroelastic fields are calculated with the finite element method simulating fluid injection with constant injection rate into a 2-dimensional domain and the influence of diffusivity, injection rate and stress field on the occurrence of microseismicity is analyzed and compared to simulations based on pore fluid pressure diffusion only.
Abstract: SUMMARY
We model microseismicity triggered by fluid injection on the basis of the theory of poroelasticity accounting for the external stress field. Consideration of the fully coupled poroelastic field equations enables us to apply a Coulomb failure criterion using pore fluid pressure and stress tensor as well as the coefficient of friction. The poroelastic fields are calculated with the finite-element method simulating fluid injection with constant injection rate into a 2-D domain. The influence of diffusivity, injection rate and stress field on the occurrence of microseismicity is analysed and compared to simulations based on pore fluid pressure diffusion only. We show that an anisotropic initial stress field causes elongated microseismic clouds. These clouds are indistinguishable from those generated in poroelastic solids under isotropic stress but exhibiting anisotropic hydraulic diffusivity. This similarity shows that microseismicity distributions dependent on both, the hydraulic properties and the coupling of pore fluid pressure to the stress field. In particular, neglecting the influence of the external stress field may lead to overestimation of the anisotropy of diffusivity tensor components. Furthermore, the results of our numerical simulations are strongly sensitive to changes of fluid injection rate.
45 citations
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TL;DR: In this article, an alternative method is presented for the Herschel-Bulkley model which eliminates the complexity associated with a general numerical method, and so offers potential benefits when dealing with the model in practice.
45 citations
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TL;DR: In this paper, it was shown that the stress at time zero on the stationary boundary for the flows generated by impulsive motion of a boundary or two boundaries is finite for a fluid of second grade and infinite for a Newtonian fluid.
45 citations