Friction Reduction in Dilute Polystyrene Solutions PDF Download
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Author: Richard Hughes Nadolink
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 352
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Book Description
Author: Richard Hughes Nadolink
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 352
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Book Description
Author: Richard H. Nadolink
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Book Description
Experiments reported herein were carried out to define and produce a calibrated polymer candidate which exhibited friction reduction with simultaneous specification of its macro-molecular properties. A series of polystyrene polymers were synthesized by a novel polymerization scheme and were extensively characterized by modern and classical techniques. The results of turbulent flow and shear wear experiments on these polystyrenes defined a range of molecular parameters in which excellent dilute solution performance was obtained for the first time reported. A complete analytical specification of the weight distribution function was obtained from experimental data. Intrinsic viscosity and normal stress measurements were made and interpreted. The acquisition of these uniquely characterized polysytrenes is shown to form a basis for future studies. Recommendations are made as to direction and execution of future research into polystyrene and other polymer mechanisms which are aimed at optimizing performance in naval applications. (Modified author abstract).
Author: Eric H. Dunlop
Publisher:
ISBN:
Category :
Languages : en
Pages : 336
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Author: Eric H. Dunlop
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Eric H. Dunlop
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Aroon Shenoy
Publisher: Springer Nature
ISBN: 303040045X
Category : Technology & Engineering
Languages : en
Pages : 196
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Book Description
This book explains theoretical derivations and presents expressions for fluid and convective turbulent flow of mildly elastic fluids in various internal and external flow situations involving different types of geometries, such as the smooth/rough circular pipes, annular ducts, curved tubes, vertical flat plates, and channels. Understanding the methodology of the analyses facilitates appreciation for the rationale used for deriving expressions of parameters relevant to the turbulent flow of mildly elastic fluids. This knowledge serves as a driving force for developing new ideas, investigating new situations, and extending theoretical analyses to other unexplored areas of the rheology of mildly elastic drag reducing fluids.The book suits a range of functions--it can be used to teach elective upper-level undergraduate or graduate courses for chemical engineers, material scientists, mechanical engineers, and polymer scientists; guide researchers unexposed to this alluring and interesting area of drag reduction; and serve as a reference to all who want to explore and expand the areas dealt with in this book.
Author: Aviel Brosh
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 520
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Author: Albert Gyr
Publisher: Springer Science & Business Media
ISBN: 3642509711
Category : Science
Languages : en
Pages : 617
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Book Description
In 1976 a similar titled IUTAM Symposium (Structure of Turbulence and Drag Reduction) was held in Washington . However, the progress made during the last thirteen years as weil as the much promising current research desired a second one this year. In Washington drag reduction by additives and by direct manipulation of the walls (compliant walls and heated surfaces) were discussed. In the meantime it became evident that drag reduction also occurs when turbulence is influenced by geometrical means, e.g. by influencing the pressure distribution by the shape of the body (airfoils) or by the introduction of streamwise perturbances on a body (riblets). In the recent years turbulence research has seen increasing attention being focused on the investigation of coherent structures, mainly in Newtonian fluids. We all know that these structures are a significant feature of turbulent flows, playing an important role in the energy balance in such flows. However their place in turbulence theories as weil as the factors influencing their development are still poorly understood. Consequently, the investigation of phenomena in which the properties of coherent structures are alte red provides a promising means of improving our understanding of turbulent flows in general.
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 606
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Book Description
