Drag On Freely Falling Cones In Newtonian And In Power Law Fluid Pdf

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drag on freely falling cones in newtonian and in power law fluid pdf

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Settling is the process by which particulates settle to the bottom of a liquid and form a sediment.

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Measurement of Rheologic Property of Blood by a Falling-Ball Blood Viscometer

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Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. In this study, xanthan gum is used as a model exopolymer to demonstrate potential effects of non-Newtonian properties of natural aquatic systems on settling dynamics of particles. Rheological measurements combined with settling experiments using visualization methods revealed that instantaneous velocity fluctuations and a flow pattern formed around a particle are the effects of solution viscoelasticity and shear-thinning properties and that the average settling velocity depends on the exopolymer concentration and particle size. Our study showed that in the considered conditions a disk-shaped particle settles preferably in vertical position with a negative wake behind.

NON NEWTONIAN FLOW AND APPLIED RHEOLOGY

The viscosity of blood obtained by using a rotational viscometer decreases with the time elapsed from the beginning of measurement until it reaches a constant value determined by the magnitude of shear rate. Therefore, we devised a new method by which one can obtain the viscosity of various fluids that are not affected by both the time elapsed from the beginning of measurement and the magnitude of shear rate by considering the balance of the forces acting on a solid spherical particle freely falling in a quiescent viscous fluid. By using the new method, we studied the rheologic behavior of corn syrups, carboxy-methyl cellulose, and human blood; and compared the results with those obtained with a cone-and-plate viscometer. It was found that in the case of corn syrups and washed red cell suspensions in which no red cell aggregate rouleau was formed, the viscosity obtained with the two different methods were almost the same. In contrast to this, in the case of the whole blood in which massive aggregates were formed, the viscosity obtained with a falling-ball viscometer was much larger than that obtained with a cone-plate viscometer. This is a preview of subscription content, access via your institution. Rent this article via DeepDyve.


particles in quiescent liquids, and/or of the fluid dynamic drag experienced by a particle placed in moving liquids is frequently needed in a range of situations in.


Newtonian fluids

Show all documents Fluids are of three types:-Liquid, Semi liquid and Gaseous. The fluid that obeys the Newtonian law of viscosity is called Newtonian fluids and in such case the shear stress is found to be a linear function of rate of strain.

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Drag coefficients and Best numbers of models of six planar snow crystals, two conical graupel and two conical small-hail particles were determined experimentally in glycerin-water mixtures and salt solutions. The Reynolds number Re range covered for the crystals was 0. It was found that the drag coefficients of dendritic shapes differed by factors of up to 4 from that of a disc of equal thickness and at an equal Reynolds number. The drag ratio is roughly constant with Re and linearly related to the ratio of the respective surface areas. The drag coefficients of the conical models assumed values between 0.

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5 Comments

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This book provides a unified treatment of modern econometric theory and practical econometric methods. Econometric Theory and Methods provides a unified treatment of modern econometric theory and practical econometric methods. The geometrical approach to least squares is emphasized, as is the method of moments, which is used to motivate a wide variety of estimators and tests.