Drag Reduction of Complex Mixtures

Drag Reduction of Complex Mixtures outlines ways to more accurately analyse
and model flow behaviour with drag reduction to improve energy saving in fluid
engineering, and turbulent flow control in fluid mechanics. In this book, drag ...

Author: Keizo Watanabe

Publisher: Academic Press

ISBN: 0128099429

Category: Technology & Engineering

Page: 222

View: 330

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 reducing additives or solid particles are mixed in fluids, this book covers these complex phenomena in a concise, but comprehensive manner. Comprehensively addresses a range of drag reduction themes involving different kinds of complex mixtures Provides data to support further experimentation and computer modeling of drag in complex flow Includes an introduction to the nature and characteristics of different kinds of complex mixtures

Rheology of Drag Reducing Fluids

The viscosity of this resulting complex soap solution was found to be only slightly
greater than that of water. ... The drag reducing ability of CTAB-naphthol mixtures
was also investigated by other researchers (Zakin, Poreh, Brosh, & Warsharsky ...

Author: Aroon Shenoy

Publisher: Springer Nature

ISBN: 303040045X

Category:

Page:

View: 233


Applied Mechanics Reviews

Belokon VS , a al ( 1972 ) , Rheological Properties of Polymer Reducing Drag
Friction , in Progress in Hear and Mass ... Govier GW and Aziz K ( 1972 ) , The
Flow of Complex Mixtures in Pipes , Van Nostrand - Reinhold Publ , Princeton NJ
.

Author:

Publisher:

ISBN:

Category: Mechanics, Applied

Page:

View: 456


Handbook of Conveying and Handling of Particulate Solids

G. W. Govier and K. Aziz, The Flow of Complex Mixtures in Pipes, Van Nostrand
Reinhold, New York, (1972). J. W. Hoyt ... A. White and J. A. G. Hemmings, Drag
Reduction by Additives, BHRA Fluid Engineering, Bedford, (1976). A. Gyr and ...

Author: A. Levy

Publisher: Elsevier

ISBN: 9780080533285

Category: Technology & Engineering

Page: 870

View: 479

This handbook presents comprehensive coverage of the technology for conveying and handling particulate solids. Each chapter covers a different topic and contains both fundamentals and applications. Usually, each chapter, or a topic within a chapter, starts with one of the review papers. Chapter 1 covers the characterization of the particulate materials. Chapter 2 covers the behaviour of particulate materials during storage, and presents recent developments in storage and feeders design and performance. Chapter 3 presents fundamental studies of particulate flow, while Chapters 4 and 5 present transport solutions, and the pitfalls of pneumatic, slurry, and capsule conveying. Chapters 6, 7 and 8 cover both the fundamentals and development of processes for particulate solids, starting from fluidisation and drying, segregation and mixing, and size-reduction and enlargement. Chapter 9 presents environmental aspects and the classification of the particulate materials after they have been handled by one of the above-mentioned processes. Finally, Chapter 10 covers applications and developments of measurement techniques that are the heart of the analysis of any conveying or handling system.

Surfactants in Tribology

All solutions investigated exhibited an excellent performance of friction reduction
of up to 60%, relative to pure water. All surfactant ... In essence, drilling fluids are
a complex mixture of a base component and different additives. Each additive ...

Author: Girma Biresaw

Publisher: CRC Press

ISBN: 1466583371

Category: Science

Page: 533

View: 159

Surface science and tribology play very critical roles in many industries. Manufacture and use of almost all consumer and industrial products rely on the application of advanced surface and tribological knowledge. The fourth in a series, Surfactants in Tribology, Volume 4 provides an update on research and development activities connecting surfactants and tribological phenomena. Written by renowned subject matter experts, the book demonstrates how improved design of surfactants can be harnessed to control tribological phenomena. Profusely illustrated and copiously referenced, the chapters also discuss novel approaches to control tribological phenomena using surfactants including green surfactants. It also discusses the underlying tribological and surface science issues relevant to many situations in diverse industries. The information in this volume provides a cutting-edge reference connecting the fields of surfactants and tribology as a way forward to novel, enhanced methods of controlling lubrication, friction, and wear. It reflects the latest developments, highlighting the relevance of surfactants in tribological phenomena in a broad range of industries. As we learn more about the connection between surfactants and tribology, new and improved ways to control lubrication, friction, and wear utilizing surfactants will emerge. This book takes us farther on the path towards this goal.

Transactions of the American Society of Civil Engineers

Drag reduction is a decrease in pressure loss at constant flow rate in turbulent
conduit flow caused by the addition of small ... A complex soap solution
consisting of a mixture of 1 - Naphthol and cetyl trimethylammonium bromide (
CTAB ) gives ...

Author: American Society of Civil Engineers

Publisher:

ISBN:

Category: Civil engineering

Page:

View: 834

Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.

Proceedings

This makes it desirable to test possible drag reduction applications at full scale .
... above 1 % by weight much greater polymer concentrations may be needed
and so the rheological behaviour of the resulting mixtures becomes more
complex .

Author: Institution of Civil Engineers (Great Britain)

Publisher:

ISBN:

Category: Civil engineering

Page:

View: 866


Advances in Turbulence XI

For HTAC/PEO mixtures, the critical PEO molecular weight for drag reduction
decreases, interpreted as due to an increase ... wall shear stress does not always
scale inversely with the hydrodynamic volume of the polymer-surfactant complex.

Author: J. M. L. M. Palma

Publisher: Springer Science & Business Media

ISBN: 9783540726043

Category: Technology & Engineering

Page: 790

View: 406

This volume comprises the communications presented at the ETC 11, the EUROMECH European Turbulence conference held in 2007 in Porto. The scientific committee has chosen the contributions out of the following topics: Acoustics of turbulent flows; Atmospheric turbulence; Control of turbulent flows; Geophysical and astrophysical turbulence; Instability and transition; Intermittency and scaling; Large eddy simulation and related techniques; MHD turbulence; Reacting and compressible turbulence; Transport and mixing; Turbulence in multiphase and non-Newtonian flows; Vortex dynamics and structure formation; Wall bounded flows.


Boundary Layer Flow over Elastic Surfaces

Compliant Surfaces and Combined Methods for Marine Vessel Drag Reduction
Viktor V. Babenko, Ho-Hwan Chun, ... this fuel blend reacts chemically and
energywise with the main flow, whereupon the flow represents a complex mixture
of ...

Author: Viktor V Babenko

Publisher: Butterworth-Heinemann

ISBN: 0123948215

Category: Science

Page: 632

View: 887

While other methods of drag reduction are well-known in marine R&D and ship design environments worldwide, compliant coating drag reduction remains less well-known and poorly understood. This important book presents cutting-edge techniques and findings from research sources not generally accessible by Western researchers and engineers, aiding the application and further development of this potentially important technology. Beginning with an introduction to drag reduction that places the authors’ work on elastic surfaces and combined techniques in context, the book moves on to provide a comprehensive study of drag reduction through elastic coating with both flow and material properties considered. Coverage includes: Experimental findings around coherent vortical structures (CVS) in turbulent boundary layers and methods of controlling them Static and dynamic mechanical characteristics of elastic composite coatings, as well as new techniques and devices developed for their measurement Combined methods of flow control and drag reduction, including the effect of injection of polymer solutions, elastic coatings and generated longitudinal vortical structures on hydrodynamic resistance Intended as a reference for senior engineers and researchers concerned with the drag reduction and the dynamics of turbulent boundary layer flows, Boundary Layer Flow over Elastic Surfaces provides a unique source of information on compliant surface drag reduction and the experimental techniques around it that have shown measurable and repeatable improvements over recent years. This compilation of research findings and new techniques developed for measurement will aid R&D engineers, naval architects and senior designers in their quest to achieve drag reductions that will deliver significant efficiency savings. Unique source of information on compliant surface drag reduction—an important area of technology with practical application to ships—from otherwise inaccessible research studies Updates the knowledge-base on boundary layer flow and surface friction reduction, critical topics in the global quest for increased ship efficiency and fuel economy Reveals new techniques and devices developed for measurement and provides a comprehensive study of drag reduction through elastic coating with both flow and material properties covered

Fluid Flow Handbook

Drag Reduction : Polymer Solutions , Soap Solutions and Solid Particle
Suspensions in Pipe Flow . ” Ind . Eng . Chem ... Friction Reduction , ”
Encyclopedia of Polymer Science and Technology , Vol . ... The Flow of Complex
Mixtures in Pipes .

Author: Saleh Jamal

Publisher: McGraw Hill Professional

ISBN: 9780071363723

Category: Science

Page: 1000

View: 478

Helps in analyzing and designing fluid flow and piping systems projects. This work, blending theoretical review and engineering practicality, provides a treatment of pumps, pipes and piping systems, hydraulics, and hydrology. With illustrations, this handbook offers a discussion on issues critical to civil engineers.



Drag Reduction

Papers Presented at the Second International Conference on Drag Reduction
Herbert Simon Stephens, J. A. Clarke. Several ... In addition , mixtures of poly (
ethylene oxide ) and soaps can have drag reductions higher than that of the
polymer in water only ( Ref . 100 ) . ... 109 ) have each contributed to our
theoretical understanding of the complex flow situation when polymer additives
are present .

Author: Herbert Simon Stephens

Publisher: Bhra Fluid Engineering

ISBN:

Category: Boundary layer control

Page: 374

View: 451


Proceedings Production Operations Symposium

higher than that in the first stage , was also recorded and an average drag
reduction of 47 % was achieved . was With further reduced water fraction ,
pressure fluctuation ... As a matter of fact , it was complex mixture with continuous
water film ...

Author:

Publisher:

ISBN:

Category: Natural gas

Page:

View: 933


Viscous Drag Reduction in Boundary Layers

Most of the surfactants studied for drag reduction are quite complex chemically ,
somewhat unstable , and temperature ... 42 In a recent study , for example , the
surfactant used was an equimolar mixture of n - tetradecyltrimethylammonium ...

Author: Dennis M. Bushnell

Publisher: AIAA (American Institute of Aeronautics & Astronautics)

ISBN:

Category: Boundary layer.

Page: 517

View: 932

Timely in two respects: the first is the growing awareness of the need for energy conservation in both transportation and process industries. The second is the recent emergence and application of several viscous drag reduction techniques. Laminar as well as turbulent flows are covered as are active


Proceedings of the International Conference on Drag Reduction 1974 at St John s College Cambridge

1-4 ) that hydrodynamic drag may be significantly increased in such flows by the
same additives that reduce drag in fully turbulent flows . ... as well as fully
turbulent flows is required to access the suitability of drag - reducing additives for
complex flow systems where all flow ... In this particular case the pipe diameter
was 5.53 mm , the solvent a water glycerine mixture of viscosity 0.0786 poise ,
and the ...

Author: Nicholas Greenwood Coles

Publisher:

ISBN:

Category: Frictional resistance (Hydrodynamics)

Page: 578

View: 490


Encyclopedia of Fluid Mechanics

Drag reduction of xanthan gum and asbestos fiber mixtures in 2.54 cm I.D. pipe at
various compositions and flow rates ( 212 ) ... chain due to the formation of a
soap - polymer micellar complex with an external sheath composed of soap
anions .

Author: Nicholas P. Cheremisinoff

Publisher: Butterworth-Heinemann

ISBN: 9780872015432

Category: Science

Page: 755

View: 238


Structure of turbulence and drag reduction

However, analysis is extremely difficult due to the complex unsteady environment
which contains a rich mixture of scales and three-dimensional vortex structures;
such vortices interact with one another and with the viscous flow near solid walls
 ...

Author: Albert Gyr

Publisher: Springer Verlag

ISBN:

Category: Science

Page: 610

View: 617