By R.P. Chhabra
Bubbles, Drops, and debris in Non-Newtonian Fluids, moment version keeps to supply thorough assurance of the clinical foundations and the newest advances in particle movement in non-Newtonian media. The ebook demonstrates how dynamic habit of unmarried debris can yield helpful details for modeling delivery approaches in complicated multiphase flows. thoroughly revised and improved, this moment variation covers macroscopic momentum and heat/mass move from a unmarried inflexible or fluid particle or ensembles of debris concerning 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 variation with new fabric on issues resembling extensional circulation; 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. an outstanding reference and guide facing the technological elements of non-Newtonian fabrics encountered in nature and in expertise, this ebook highlights qualitative adjustments among the reaction of a Newtonian and non-Newtonian fluids within the advanced flows encountered in processing functions.
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Additional info for Bubbles, Drops, and Particles in Non-Newtonian Fluids, Second Edition (Chemical Industries)
Data demonstrating the so-called upper and lower Newtonian regions are difficult to obtain and are scarce. 6. Note that three different instruments have been used to encompass seven orders of magnitudes of shear rates. 2 mPa s. The value of the shear rate at which the two limiting forms of behavior and the rate of decrease of viscosity in the intermediate shear-thinning region depend upon the physicochemical factors such as the type and concentration of polymer, its molecular weight distribution and the type of solvent.
2007 by Taylor & Francis Group, LLC RAJ: “dk3171_c001” — 2006/6/8 — 23:02 — page 7 — #7 8 Bubbles, Drops, and Particles in Fluids The confining walls are known to influence the hydrodynamic behavior of isolated rigid and fluid particles, both by exerting extra retardation force and by altering the shape of fluid particles. Chapter 10 examines such wall effects in details. Starting with the extent of wall effects in Newtonian fluids, the available scant body of knowledge for non-Newtonian fluids is reviewed here for rigid and fluid particles.
17 Typical first normal stress difference data for Polystyrene in toluene solutions (Kulicke and Wallbaum 1985). 18 Typical second normal stress difference data for polystyrene in toluene solutions (Kulicke and Wallbaum 1985). Bubbles, Drops, and Particles in Fluids RAJ: “dk3171_c002” — 2006/6/8 — 23:03 — page 36 — #28 103 Non-Newtonian Fluid Behavior 37 magnitude of N1 is taken to be a measure of the level of the fluid visco-elasticity. However, there is no guarantee that a substance that exhibits significant first normal stress difference in steady shear will also show large values of the storage modulus in an oscillatory experiment.