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Monday, July 27, 2020 | History

5 edition of Drag reduction of turbulent flows by additives found in the catalog.

Drag reduction of turbulent flows by additives

by Albert Gyr

  • 282 Want to read
  • 17 Currently reading

Published by Kluwer Academic in Dordrecht, Boston .
Written in English

    Subjects:
  • Turbulence,
  • Frictional resistance (Hydrodynamics)

  • Edition Notes

    Includes bibliographical references (p. 219-229) and index.

    Statementby A. Gyr and H.-W. Bewersdorff.
    SeriesFluid mechanics and its applications ;, v. 32
    ContributionsBewersdorff, H.-W.
    Classifications
    LC ClassificationsTA357.5.T87 G97 1995
    The Physical Object
    Paginationxi, 234 p. :
    Number of Pages234
    ID Numbers
    Open LibraryOL780703M
    ISBN 10079233485X
    LC Control Number95012572

    Turbulent flow is a difficult issue in fluid dynamics, the rules of which have not been totally revealed up to now. Fluid in turbulent state will result in a greater frictional force, which must consume great energy. Therefore, it is not only an important influence in saving energy and improving energy utilization rate but also an extensive application prospect in many fields, such as ship Cited by: 6. F.C, Kawaguchi. Y, Segawa. T. and Hishida. K.: Reynolds number dependence of turbulence structures in a drag-reduction surfactant solution channel flow investigated by particle image velocimetry, Physics of Fluids, [2] Gyr A., Bewersdorff H.W., Drag Reduction of Turbulent Flows by Additives, The Netherlands Kluwer Academic Publishers ().

    Drag Reduction of Complex Mixtures discusses the concept of drag reduction phenomena in complex mixtures in internal and external flows that are shown experimentally by dividing flow patterns into three categories. The book is intended to support further experiments or analysis in drag reduction. As accurately modeling flow behavior with drag reduction is always complex, and since drag. Drag reduction by polymer additives are taken several steps further by incorporating anisotropic and elastic e ects. That anisotropy might be important was suggested by the experiments performed by Virk & Wagger (). They studied the relation between the friction and the flow rate of polymer solutions in a turbulent pipe flow.

    Description. Drag reducing agents can be broadly classified under the following four categories – Polymers, Solid-particle suspensions, Biological additives, and agents are made out of high molecular weight polymers or micellar systems. The polymers help with drag reduction by decreasing turbulence in the oil lines. This allows for oil to be pumped through at lower. In 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.


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Drag reduction of turbulent flows by additives by Albert Gyr Download PDF EPUB FB2

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.

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 : Hardcover.

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 Format: Hardcover.

Turbulent drag reduction by additives has long been Drag reduction of turbulent flows by additives book 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. Drag Reduction of Turbulent Flows by Additives is the first treatment of the subject in book form.

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 Turbulent Flow With Polymer Additives Article in Journal of Fluids Engineering (5) May with 58 Reads How we measure 'reads'Author: Shu-Qing Yang.

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 espectáculos how fibres, polymer molecules or surfactants at very dilute concentrations cánido reduce the drag of turbulent flow, leadin g to.

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 : Wiley.

Eurom on drag reduction in turbulent flows due to additives, was held from August in Stockholm, Sweden, under the chairmanship of M. Landahl, and was intended to bring together specialists in the various aspects of the drag-reduction phenomenon to discuss current experimental and.

Abstract. Long-chain flexible polymers of high molecular weight are known to greatly reduce the skin friction drag in turbulent flow when added to a liquid even at minute concentrations [].This phenomenon has prompted a large number of studies see e.g.

[2, 3, 4], yet it has never been possible to relate the degree of drag reduction (DR) to a measurable fluid : Bayode Owolabi.

The new technique is applied to the analysis of heat and mass transfer correlations for convective flows, and to the interpretatio of turbulent drag reduction by additives in wall–bounded flows.

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 Pages: Turbulent Drag Reduction by Surfactant Additives por Feng-Chen Li,disponible en Book Depository con envío gratis.

Friction Drag Reduction of External Flows with Bubble and Gas Injection Steven L. Ceccio Annual Review of Fluid Mechanics Drag Reduction in Nature D. Bushnell and K. Moore Annual Review of Fluid Mechanics Mechanics and Prediction of Turbulent Drag Reduction with Polymer Additives Christopher M.

White and M Godfrey. MungalCited by: 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.

Drag Reduction in Turbulent Flow With Polymer Additives Shu-Qing Yang. The mean velocity profile and friction factor in turbulent flows with polymer additives are investigated using Prandtl’s mixing-length theorem. Drag Reduction of Turbulent Flow by Additives, Kluwer Academic, by: Drag reduction was investigated for the combined system of polymer additives and a riblet pipe.

The riblet grooves were V-shaped, the spacing of which was mm and the height of which was mm. For higher h +, a triangular riblet system including other geometries increases the drag to levels similar to those of normal transient by: 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 : Wiley.

The effect of drag reduction in turbulent flows by additives was apparently discovered by Toms inand has been known since then as the Toms phenomenon. It is the effect of reduced drag in turbulent flow of a low concentration fibrous additive suspension, Cited by: Drag reduction in a flat-plate turbulent boundary layer flow by polymer additives Abstract This paper presents a theoretical study on the velocity distribution and the friction factor of boundary layer flows with polymer additives starting from the concept of “stress deficit.” A novel method of order of.

In order to investigate the effects of injection position on drag reduction as well as further the effects of polymer additives on turbulent structures, LDA measurements of turbulent pipe flows were conducted.The additives causing drag reduction can be divided in three groups: polymers, surfactants and fibres.

A detailed description of the drag reduction phenomenon is given by Gyr and Bewersdorff [2]. In this paper we will restrict ourselves to drag reduction of turbulent pipe flow by long flexible polymers, which are dissolved in water.Experimental Study on Drag Reduction by Surfactant Additives in Turbulent Pipe Flow Reynolds shear stress (no presented here) for the CTAC solution are nearly zero in comparison to the ones obtained for the Newtonian flow by PIV.

This is an interesting result which corroborates those reported by some authors as Li et al.().File Size: KB.