[PDF] Non Newtonian Effects On Flow Generated Cavitation And On Cavitation In A Pressure Field eBook

Author : Albert T. Ellis
Publisher :
Page : 26 pages
File Size : 12,31 MB
Release : 1970
Category :
ISBN :

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Observations are presented which show that the stresses in a flow field of a very dilute polymer are not well enough described by the Navier-Stokes equations to accurately predict cavitation. The constitutive equation for the particular polymer and concentration used is needed. The second-order fluid form in which accelerations are relatively important appears capable of explaining observed cavitation suppression by changing the pressure field due to flow. Bubble dynamics in stationary dilute polymer solutions are also examined and found to be little different from those in water. (Author).

Author : Emil Brujan
Publisher : Springer Science & Business Media
Page : 274 pages
File Size : 37,28 MB
Release : 2010-09-28
Category : Technology & Engineering
ISBN : 3642153437

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Non-Newtonian properties on bubble dynamics and cavitation are fundamentally different from those of Newtonian fluids. The most significant effect arises from the dramatic increase in viscosity of polymer solutions in an extensional flow, such as that generated about a spherical bubble during its growth or collapse phase. In addition, many biological fluids, such as blood, synovial fluid, and saliva, have non-Newtonian properties and can display significant viscoelastic behaviour. This monograph elucidates general aspects of bubble dynamics and cavitation in non-Newtonian fluids and applies them to the fields of biomedicine and bioengineering. In addition it presents many examples from the process industries. The field is strongly interdisciplinary and the numerous disciplines involve have and will continue to overlook and reinvent each others’ work. This book helps researchers to think intuitively about the diverse physics of these systems, to attempt to bridge the various communities involved, and to convey the interest, elegance, and variety of physical phenomena that manifest themselves on the micrometer and microsecond scales.

Author : Stuart Kayo Hara
Publisher :
Page : 187 pages
File Size : 27,98 MB
Release : 1983
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ISBN :

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Flow cavitation is substantially altered, both at inception and during subsequent dynamics, by the addition of small amounts of water-soluble polymer. Theoretical and experimental single-bubble systems developed here trace the shape of a bubble as it is influenced by a volume change of the cavity, the rheology of the surrounding fluid, the presence of a solid wall, and/or an imposed external flow. The theoretical formulation pertains to a bubble in a fluid which is infinite in extent and contains no barriers or interfaces apart from the bubble surface. An external flow can be imposed, imparting a stress history. In addition, a spherical bubble profile, obtained from present experiments or theories, dictates a volume change and drives the non-sphericities. (Author).

Author : Walter S. Cunnan
Publisher :
Page : 36 pages
File Size : 27,2 MB
Release : 1969
Category : Cavitation
ISBN :

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Fluid temperature effect on cavitation performance of axial flow pump.

Author : Dmitry A. Biryukov
Publisher : CRC Press
Page : 392 pages
File Size : 22,22 MB
Release : 2022-04-28
Category : Science
ISBN : 100058738X

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Cavitation is a dangerous process which destroys objects in a fluid. Scientific description of this multifaceted phenomenon is based on almost every area of physics, and many interesting effects are connected with cavitation. The most intriguing of them is sonoluminescence – the light emitted from a cavitating fluid. This book presents a full-scale description of cavitation: from the basic thermodynamic principles to special phenomena associated with this complex process, from the dynamics of a single gas cavity to the catastrophic macroscopic manifestations, from the domestic observations to the nuances of X-ray spectroscopic research.

Author : Yves Lecoffre
Publisher : CRC Press
Page : 432 pages
File Size : 17,4 MB
Release : 1999-01-01
Category : Science
ISBN : 9789054107835

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This text deals with the concept that cavitation is the main limitation to the performance of hydraulic components. Topics covered include the vaporization of liquids due to high velocities or pressure fluctuations, and the effects of cavitation on the performances of rotary machinery. One chapter is devoted to cavitation noise which concerns many users, including surface ships and submarines, and the author finishes with some examples of the use of cavitation and subject-specific measuring techniques.