Get Bubbles, Drops, and Particles in Non-Newtonian Fluids, PDF

By R.P. Chhabra

ISBN-10: 0824723295

ISBN-13: 9780824723293

Bubbles, Drops, and debris in Non-Newtonian Fluids, moment version maintains to supply thorough assurance of the clinical foundations and the newest advances in particle movement in non-Newtonian media. The publication demonstrates how dynamic habit of unmarried debris can yield priceless info for modeling delivery strategies in advanced multiphase flows. thoroughly revised and accelerated, this moment variation covers macroscopic momentum and heat/mass move from a unmarried inflexible or fluid particle or ensembles of debris related to powerful inter-particle interactions together with packed beds, fluidized beds, and porous media with sorts of non-Newtonian fluids. It displays advances made because the e-book of the former, bestselling version with new fabric on themes corresponding to extensional circulate; time-independent, time-dependent and visco-elastic fluids; unfastened settling habit of non-spherical debris; and particle movement in visco-elastic and visco-plastic fluids, boundary layer flows, flows in porous media, and falling item rheometry. a superb reference and guide facing the technological elements of non-Newtonian fabrics encountered in nature and in know-how, this ebook highlights qualitative alterations among the reaction of a Newtonian and non-Newtonian fluids within the advanced flows encountered in processing functions.

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Additional resources for Bubbles, Drops, and Particles in Non-Newtonian Fluids, Second Edition (Chemical Industries)

Sample text

1999). In recent years, some attempts have also been made at explaining the shear-thickening behavior of dilute polymer solutions via Brownian dynamics calculations (Hatzikiriakos and Vlassopoulos, 1996). A recent survey (Bagley and Dintzis, 1999) provides an overview of the activity in this field with special reference to food-stuffs and biopolymers. , 1997). 12) may be used with n > 1 in this case. This empirical approach is believed to be useful in providing crude estimates for process engineering design calculation purposes.

All such attempts entail varying degrees of idealizations and empiricisms; their most notable limitation being “small” strain and “low” strain rate, or in the so-called linear ranges. Furthermore, in laminar shear flows, these models predict the viscosity to be independent of shear rate that is contrary to experimental results for most polymer solutions and melts under conditions of practical interest. In spite of the aforementioned deficiencies, linear visco-elastic theories have proved to be useful in predicting certain time-dependent features of fluid behavior, and in providing useful qualitative insights into the nature of flow.

The constant of proportionality, µ, a characteristic property of each substance, is variously known as the Newtonian viscosity, shear viscosity, dynamic viscosity, or simply viscosity. 1 Schematic representation of unidirectional shearing flow. RAJ: “dk3171_c002” — 2006/6/8 — 23:03 — page 10 — #2 Non-Newtonian Fluid Behavior 11 fluidity, is also used to indicate the mobility of a substance. By the definition of a Newtonian fluid, the value of µ is independent of the shear rate, and it depends only on temperature and pressure.

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Bubbles, Drops, and Particles in Non-Newtonian Fluids, Second Edition (Chemical Industries) by R.P. Chhabra


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