air bubble entrainment in free surface turbulent shear flows

Download Book Air Bubble Entrainment In Free Surface Turbulent Shear Flows in PDF format. You can Read Online Air Bubble Entrainment In Free Surface Turbulent Shear Flows here in PDF, EPUB, Mobi or Docx formats.

Air Bubble Entrainment In Free Surface Turbulent Shear Flows

Author : Hubert Chanson
ISBN : 0080526896
Genre : Science
File Size : 77. 7 MB
Format : PDF, Mobi
Download : 188
Read : 476

Get This Book


This book develops an analysis of the air entrainment processes in free-surface flows. These flows are investigated as homogeneous mixtures with variable density. Several types of air-water free-surface flows are studied: plunging jet flows, open channel flows, and turbulent water jets discharging into air. Experimental observations reported by the author confirm the concept that the air-water mixture behaves as a homogeneous compressible fluid in each case. This book will be of great interest to professionals working in many fields of engineering: chemical, civil, environmental, mechanical, mining, metallurgy, and nuclear. Covers new information on the air-water flow field: air bubble distributions, air-water velocity profiles, air bubble sizes and bubble-turbulence interactions Features new analysis is developed for each flow configuration and compared successfully with model and prototype data Includes over 372 references and more than 170 figures with over 60 photographs Presents useful information for design engineers and research-and-development scientists who require a better understanding of the fluid mechanics of air-water flows

Fluid Mechanics Of Environmental Interfaces

Author : Sajjan G. Shiva
ISBN : 9780203109243
Genre : Science
File Size : 59. 46 MB
Format : PDF, Kindle
Download : 756
Read : 490

Get This Book


Environmental Fluid Mechanics (EFM) studies the motion of air and water at several different scales, the fate and transport of species carried along by these fluids, and the interactions among those flows and geological, biological, and engineered systems. EFM emerged some decades ago as a response to the need for tools to study problems of flow an

Fluid Mechanics Of Environmental Interfaces

Author : Carlo Gualtieri
ISBN : 9781134064236
Genre : Science
File Size : 65. 93 MB
Format : PDF, ePub, Docs
Download : 508
Read : 1273

Get This Book


An environmental interface is defined as a surface between two abiotic or biotic systems, in relative motion and exchanging mass, heat and momentum through biophysical and/or chemical processes. These processes fluctuate temporally and spatially. The book first treats exchange processes occurring at the interfaces between atmosphere and the surface of the sea, and atmosphere and land surface. These exchanges include the effect of vegetation, transport of dust and dispersion of passive substances within the atmosphere. Processes at the environmental interfaces of freshwater, such as gas-transfer at free-surfaces of rivers, advective diffusion of air bubbles in turbulent water flows and boundary-layers phenomena in vegetated open channels are also described. Finally, the book deals with the phenomena that affect transport of material to and from the surface of an organism, including molecular and turbulent diffusion. The relevant issues related to mass transfer to and from benthic plants and animals are further considered in detail. The book will be of interest to graduate students and researchers in environmental sciences, civil engineering and environmental engineering, (geo)physics and applied mathematics.

Phase Detection Measurements In Free Surface Turbulent Shear Flows

Author :
ISBN : OCLC:1051908615
Genre :
File Size : 35. 91 MB
Format : PDF, Kindle
Download : 230
Read : 402

Get This Book


Abstract: High-velocity self-aerated flows are described as 'white waters' because of the entrained air bubbles. The air entrainment induces a drastic change in the multiphase flow structure of the water column and this leads to significant bubble-turbulence interactions, turbulence modulation and associated mixing processes impacting on the bulk flow properties. In these high-velocity free-surface turbulent flows, the phase-detection needle probe is a most reliable instrumentation. The signal processing of a phase-detection probe is re-visited herein. It is shown that the processing may be performed on the raw probe signal as well as the thresholded data. The latter yields the time-averaged void fraction, the bubble count rate, the particle chord time distributions and the particle clustering properties within the particulate flow regions. The raw probe signal analysis gives further the auto-correlation time scale and the power spectrum density function. Finally dimensional considerations are developed with a focus on the physical modelling of free-surface flows in hydraulic structures. It is argued that the notion of scale effects must be defined in terms of some specific set of air–water flow properties within well-defined testing conditions, while a number of free-surface flow characteristics are more prone to scale effects than others, even in large-size physical facilities.

Hydraulics Of Open Channel Flow

Author : Hubert Chanson
ISBN : 9780080472973
Genre : Technology & Engineering
File Size : 84. 44 MB
Format : PDF, ePub
Download : 785
Read : 199

Get This Book


Since the publication of its first edition in 1999, 'The Hydraulics of Open Channel Flow' has been praised by professionals, academics, students and researchers alike as the most practical modern textbook on open channel flow available. This new edition includes substantial new material on hydraulic modelling, in particular addressing unsteady open channel flows. There are also many new exercises and projects, including a major new revision assignment. This innovative textbook contains numerous examples and practical applications, and is fully illustrated with photographs. Dr Chanson introduces the basic principles of open channel flow and takes readers through the key topics of sediment transport, hydraulic modelling and the design of hydraulic structures. ·Comprehensive coverage of the basic principles of key application areas of the hydraulics of open channel flow ·New exercises and examples added to aid understanding ·Ideal for use by students and lecturers in civil and environmental engineering

Applied Hydrodynamics

Author : Hubert Chanson
ISBN : 9780203876268
Genre : Science
File Size : 50. 47 MB
Format : PDF, Mobi
Download : 738
Read : 941

Get This Book


Fluid dynamics is the engineering science dealing with forces and energies generated by fluids in motion. Fluid dynamics and hydrodynamics play a vital role in everyday life. Practical examples include the flow motion in the kitchen sink, the exhaust fan above the stove, and the air conditioning system in our home. When driving a car, the air flow around the vehicle body induces some drag which increases with the square of the car speed and contributes to excess fuel consumption. Engineering applications encompass fluid transport in pipes and canals, energy generation, environmental processes and transportation (cars, ships, aircrafts). Other applications include coastal structures, wind flow around buildings, fluid circulations in lakes, oceans and atmosphere, and even fluid motion in the human body. This textbook deals with the topic of applied hydrodynamics. The lecture material is grouped into two complementary sections: ideal fluid flow and real fluid flow. The former deals with two- and possibly three-dimensional fluid motions that are not subject to boundary friction effects, while the latter considers the flow regions affected by boundary friction and turbulent shear. The lecture material is designed as an intermediate course in fluid dynamics for senior undergraduate and postgraduate students in Civil, Environmental, Hydraulic and Mechanical Engineering. It is supported by notes, applications, remarks and discussions in each chapter. Moreover a series of appendices is added, while some major homework assignments are developed at the end of the book, before the bibliographic references.

Hydraulics Of Stepped Chutes And Spillways

Author : Hubert Chanson
ISBN : 9058093522
Genre : Science
File Size : 72. 68 MB
Format : PDF, Mobi
Download : 637
Read : 868

Get This Book


Stepped channel design has been in use for more than 3,500 years. Recent advances in technology have triggered a regained interest in stepped design, although much expertise has been lost in the last 80 years. The steps significantly increase the rate of energy dissipation taking place along the chute and reduce the size of the required downstream energy dissipation basin. Stepped cascades are also used in water treatment plants to enhance the air-water transfer of atmospheric gases (e.g. oxygen, nitrogen) and of volatile organic components (VOC). Results from more than forty-five laboratory studies and four prototype investigations were re-analysed and compared. The book provides a new understanding of stepped channel hydraulics, and is aimed both at researchers and professionals.

Environmental Hydraulics For Open Channel Flows

Author : Hubert Chanson
ISBN : 0080472699
Genre : Technology & Engineering
File Size : 24. 44 MB
Format : PDF, ePub, Mobi
Download : 250
Read : 937

Get This Book


Environmental Hydraulics is a new text for students and professionals studying advanced topics in river and estuarine systems. The book contains the full range of subjects on open channel flows, including mixing and dispersion, Saint-Venant equations method of characteristics and interactions between flowing water and its surrondings (air entrainment, sediment transport). Following the approach of Hubert Chanson's highly successful undergraduate textbook Hydraulics of Open Channel Flow, the reader is guided step-by-step from the basic principles to more advanced practical applications. Each section of the book contains many revision exercises, problems and assignments to help the reader test their learning in practical situations. ·Complete text on river and estuarine systems in a single volume ·Step-by-step guide to practical applications ·Many worked examples and exercises

Journal Of Zhejiang University

Author :
ISBN : UOM:39015060978072
Genre : Science
File Size : 53. 41 MB
Format : PDF, Docs
Download : 158
Read : 964

Get This Book



Proceedings Of The 2002 Asme Joint U S European Fluids Engineering Conference Pts A B Forums

Author : Upendra S. Rohatgi
ISBN : 0791836150
Genre : Fluid dynamics
File Size : 77. 85 MB
Format : PDF, ePub
Download : 413
Read : 617

Get This Book



Top Download:

Best Books