Author: A. T. Ellis
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
The drag reducing properties of two dilute polymer solutions were studied using a simple turbulent pipe flow apparatus under various conditions of storage and mechanical degradation. Aqueous solutions of Polyox WSR-301 (polyethylene oxide) and Separan AP-30 (polyacrylamide) were prepared at 500 PPMW and then diluted into weak concentrations for storage and testing on a day by day basis. Data which display the friction reducing effectiveness as a function of aging and repeated shear degradation are presented for both polymers. At concentrations of 10, 25, 50 and 100 PPMW, aged samples showed the same 'peak' effectiveness as freshly prepared ones. However, the aging process reduced all the ability to resist mechanical degradation. Anomalies were found in which solutions tend to partially recover from shear degradation under certain conditions, and in other cases tend to improve their friction reducing efficiency after continuous shearing. Experimental results suggest that entanglement or aggregation of polymer molecules could be one of the important mechanisms involved in friction reduction. (Author).
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:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 390
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Author: United States. Coast Guard
Publisher:
ISBN:
Category : Oil pollution of rivers, harbors, etc
Languages : en
Pages : 204
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Author: Richard Hughes Nadolink
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 352
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Author:
Publisher:
ISBN:
Category : Ocean engineering
Languages : en
Pages : 112
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Author: Robert Yen-ying Ting
Publisher:
ISBN:
Category : Cavitation
Languages : en
Pages : 244
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Author:
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 982
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Author: Maritime Research Information Service
Publisher:
ISBN:
Category :
Languages : en
Pages : 1120
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Author:
Publisher:
ISBN:
Category : Hydrofoil boats
Languages : en
Pages : 56
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