Topic

# Generalized Newtonian fluid

About: Generalized Newtonian fluid is a research topic. Over the lifetime, 1813 publications have been published within this topic receiving 38746 citations.

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TL;DR: In this article, a general relationship between impeller speed and the shear rate of a non-Newtonian fluid has been developed, and the resulting relationship was then used to interpret and correlate power-consumption data on three non-newtonian fluids by use of a generalized form of the conventional power-number-Reynoldsnumber plot for Newtonians.

Abstract: Since the shear rate of a non-Newtonian fluid is of importance in fixing the rheological or viscometric behavior of such a material, the present study has been concerned with the development of a general relationship between impeller speed and the shear rate of the fluid. The resulting relationship was then used to interpret and correlate power-consumption data on three non-Newtonian fluids by use of a generalized form of the conventional power-number–Reynolds-number plot for Newtonians.
Flat-bladed turbines from 2 to 8 in. in diameter were used exclusively. Tank diameters ranged from 6 to 22 in. and power inputs from 0.5 to 176 hp./1,000 gal. The study encompassed a 130-fold range of Reynolds numbers in the laminar and transition regions. The results to date indicate that power requirements for the rapid mixing of non-Newtonian fluids are much greater than for comparable Newtonian materials.

905 citations

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TL;DR: In this article, the authors derived a completely general formulation of the dynamics of a Newtonian fluid interface, that is, one whose rheological behaviour is characterized by its equilibrium interfacial tension and B oussinesq's [18] two coefficients of surface viscosity.

Abstract: The importance of interface rheology to foam stability and to the calming of water waves by oil has long been recognized in a general way. Recent research reveals its vital importance in many free-boundary flows, for example in distillation and liquid extraction. In order to understand quantitatively these flows, mathematical descriptions of the dynamics of an interface are needed. Herein is derived a completely general formulation of the dynamics of a Newtonian fluid interface, that is, one whose rheological behaviour is characterized by its equilibrium interfacial tension and B oussinesq 's [18] two coefficients of surface viscosity. With consideration of the intimate coupling between surface and substrate, the analysis finally yields interfacial boundary conditions on two-phase flows.

794 citations

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01 Jan 1974698 citations

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TL;DR: It is concluded that, while the Newtonian model of blood viscosity is a good approximation in regions of mid-range to high shear, it is advisable to use the Generalised Power Law model in order to achieve better approximation of wall shear stress at low shear.

Abstract: This study looks at blood flow through four different right coronary arteries, which have been reconstructed from bi-plane angiograms Five non-Newtonian blood models, as well as the usual Newtonian model of blood viscosity, are used to study the wall shear stress in each of these arteries at a particular point in the cardiac cycle It was found that in the case of steady flow in a given artery, the pattern of wall shear stress is consistent across all models The magnitude of wall shear stress, however, is influenced by the model used and correlates with graphs of shear stress versus strain for each model For mid-range velocities of around 02 m s(-1) the models are virtually indistinguishable Local and global non-Newtonian importance factors are introduced, in an attempt to quantify the types of flows where non-Newtonian behaviour is significant It is concluded that, while the Newtonian model of blood viscosity is a good approximation in regions of mid-range to high shear, it is advisable to use the Generalised Power Law model (which tends to the Newtonian model in those shear ranges in any case) in order to achieve better approximation of wall shear stress at low shear

627 citations

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01 Jan 1978

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Abstract: It sounds good when knowing the mechanics of non newtonian fluids in this website. This is one of the books that many people looking for. In the past, many people ask about this book as their favourite book to read and collect. And now, we present hat you need quickly. It seems to be so happy to offer you this famous book. It will not become a unity of the way for you to get amazing benefits at all. But, it will serve something that will let you get the best time and moment to spend for reading the book.

513 citations