Drag Reduction In Fluid Flows

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Turbulent Drag Reduction By Surfactant Additives

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Author : Feng-Chen Li
language : en
Publisher: John Wiley & Sons
Release Date : 2012-01-10

Turbulent Drag Reduction By Surfactant Additives written by Feng-Chen Li and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-10 with Science categories.

Turbulent drag reduction by additives has long been a hot research topic. This phenomenon is inherently associated with multifold expertise. Solutions of drag-reducing additives are usually viscoelastic fluids having complicated rheological properties. Exploring the characteristics of drag-reduced turbulent flows calls for uniquely designed experimental and numerical simulation techniques and elaborate theoretical considerations. Pertinently understanding the turbulent drag reduction mechanism necessities mastering the fundamentals of turbulence and establishing a proper relationship between turbulence and the rheological properties induced by additives. Promoting the applications of the drag reduction phenomenon requires the knowledge from different fields such as chemical engineering, mechanical engineering, municipal engineering, and so on. This book gives a thorough elucidation of the turbulence characteristics and rheological behaviors, theories, special techniques and application issues for drag-reducing flows by surfactant additives based on the state-of-the-art of scientific research results through the latest experimental studies, numerical simulations and theoretical analyses. Covers turbulent drag reduction, heat transfer reduction, complex rheology and the real-world applications of drag reduction Introduces advanced testing techniques, such as PIV, LDA, and their applications in current experiments, illustrated with multiple diagrams and equations Real-world examples of the topic’s increasingly important industrial applications enable readers to implement cost- and energy-saving measures Explains the tools before presenting the research results, to give readers coverage of the subject from both theoretical and experimental viewpoints Consolidates interdisciplinary information on turbulent drag reduction by additives Turbulent Drag Reduction by Surfactant Additives is geared for researchers, graduate students, and engineers in the fields of Fluid Mechanics, Mechanical Engineering, Turbulence, Chemical Engineering, Municipal Engineering. Researchers and practitioners involved in the fields of Flow Control, Chemistry, Computational Fluid Dynamics, Experimental Fluid Dynamics, and Rheology will also find this book to be a much-needed reference on the topic.

Drag Reduction In Fluid Flows

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Author : Robert H. J. Sellin
language : en
Publisher:
Release Date : 1989

Drag Reduction In Fluid Flows written by Robert H. J. Sellin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Boundary layer control categories.

Drag Reduction Of Turbulent Flows By Additives

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Author : A. Gyr
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09

Drag Reduction Of Turbulent Flows By Additives written by A. Gyr and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Technology & Engineering categories.

Drag Reduction of Turbulent Flows by Additives is the first treatment of the subject in book form. The treatment is extremely broad, ranging from physicochemical to hydromechanical aspects. The book shows how fibres, polymer molecules or surfactants at very dilute concentrations can reduce the drag of turbulent flow, leading to energy savings. The dilute solutions are considered in terms of the physical chemistry and rheology, and the properties of turbulent flows are presented in sufficient detail to explain the various interaction mechanisms. Audience: Those active in fundamental research on turbulence and those seeking to apply the effects described. Fluid mechanical engineers, rheologists, those interested in energy saving methods, or in any other application in which the flow rate in turbulent flow should be increased.

Drag Reduction In Fluid Flows

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Author : R. H. J. Sellin
language : en
Publisher: Ellis Horwood Limited
Release Date : 1989-11-01

Drag Reduction In Fluid Flows written by R. H. J. Sellin and has been published by Ellis Horwood Limited this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989-11-01 with Fluid dynamics. categories.

Laminar Drag Reduction

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Author : Keizo Watanabe
language : en
Publisher: Bentham Science Publishers
Release Date : 2015-06-05

Laminar Drag Reduction written by Keizo Watanabe and has been published by Bentham Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-05 with Technology & Engineering categories.

The phenomenon of resistance to motion through a fluid is believed to be a function of fluid-wall interaction. This theory is based on the assumption that under certain conditions a real fluid does not usually slip on the wall in contact with it and displays laminar flow. This set of conditions is known as a ‘no slip boundary condition’. But if a fluid is passed alongside a wall, the drag reduction in the laminar flow region can be calculated. In Laminar Drag Reduction, the frictional drag of an internal or an external fluid flow along a certain kind of hydrophobic wall is investigated. An analytic approach towards the mechanism of drag reduction is employed using Navier-Stokes existence and smoothness equations. The experimental results presented in this book show that frictional drag of a fluid alongside this hydrophobic wall decreases in comparison with fluid flow along a conventional wall or surface. This form of laminar drag reduction represents a relatively new area of research, where the laminar flow can be controlled by microscopic surface modifications, allowing fluid flows to slip over a wall. Laminar Drag Reduction brings information about some interesting phenomena related to fluid slippage on a highly water-repellent surface. Readers, physics graduates and senior researchers alike, can benefit from the information presented in this book to tackle more challenging questions in fluid mechanics research.

Viscous Drag Reduction

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Author : C. Sinclair Wells
language : en
Publisher: Springer
Release Date : 2013-12-20

Viscous Drag Reduction written by C. Sinclair Wells and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-20 with Technology & Engineering categories.

Turbulence Control By Passive Means

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Author : E. Coustols
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Turbulence Control By Passive Means written by E. Coustols and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.

Proceedings of the 4th European Drag Reduction Meeting

Aerodynamic Drag Reduction Technologies

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Author : Peter Thiede
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29

Aerodynamic Drag Reduction Technologies written by Peter Thiede and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Technology & Engineering categories.

------------------------------------------------------------ This volume contains the Proceedings of the CEAS/DragNet European Drag Reduction Conference held on 19-21 June 2000 in Potsdam, Germany. This conference, succeeding the European Fora on Laminar Flow Technology 1992 and 1996, was initiated by the European Drag Reduction Network (DragNet) and organised by DGLR under the auspice of CEAS. The conference addressed the recent advances in all areas of drag reduction research, development, validation and demonstration including laminar flow technology, adaptive wing concepts, turbulent and induced drag reduction, separation control and supersonic flow aspects. This volume which comprises more than 40 conference papers is of particular interest to engineers, scientists and students working in the aeronautics industry, research establishments or academia.

Drag Reduction In Fluid Flows

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Author : R. T. Moses
language : en
Publisher: Ellis Horwood
Release Date : 1989

Drag Reduction In Fluid Flows written by R. T. Moses and has been published by Ellis Horwood this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Boundary layer control categories.

Mitigation Of Hydrodynamic Resistance Methods To Reduce Hydrodynamic Drag

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Author : Marc Perlin
language : en
Publisher: World Scientific
Release Date : 2014-11-18

Mitigation Of Hydrodynamic Resistance Methods To Reduce Hydrodynamic Drag written by Marc Perlin and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-11-18 with Technology & Engineering categories.

This text presents the state of the art in friction drag/resistance reduction technologies for BODIES and crafts operating in liquids at and beneath the free surface. It is useful for professionals with backgrounds in advanced fluid dynamics as well as by academics teaching introductory graduate courses in this area. Active control of resistance will include a discussion of friction reduction, for example through the injection of gas that can form air layers and polymers that initially reside adjacent to the hull, including the use of partial and super cavities. The book discusses passive resistance control achieved through changes in the overall hull shape and appendages, including the application of lifting bodies, bulbous bows, and stern flaps. It also addresses passive reduction of skin friction through the application of hull coatings and other elements of hull husbandry.