Turbulence Measurements in a Meandering Laboratory River Channel

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (288 download)

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Book Synopsis Turbulence Measurements in a Meandering Laboratory River Channel by : Owais Zahid Syed

Download or read book Turbulence Measurements in a Meandering Laboratory River Channel written by Owais Zahid Syed and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of turbulence characteristics were performed in a laboratory meandering river channel. The measurements were performed using a single hot-film anemometer at five sections beginning from the apex of the first bend to the apex of the second bend. Measurements were made at different depths along the verticals at different positions across a cross section. The data gathered in this study included longitudinal velocity, relative turbulent intensity, auto-correlation functions, energy spectra, and normalized macroscale and microscale. The objectives of presenting and interpreting the data are to understand how the turbulence is affected by channel curvature and also how it changes with the depth. The average flow depth for the meandering channel was 0.40 ft. The average width of the channel was 5.42 ft. The average flow speed was 1.61 fps. The vertical profiles of the longitudinal velocity showed that the mean velocity profiles do not follow a logarithmic pattern in the upper part of the flow. For all the stations the relative turbulent intensity normalized with local mean velocity decreased with increasing distance from the bottom of the channel except near the water surface in the same location. The variation of the turbulent intensity with the relative depth was found to be non-logarithmic for all sections. The autocorrelation coefficients decreased from unity for no time lag to zero for a time lag on the order of 0.5 seconds. The energy spectra showed that most of the energy is concentrated in frequencies less than 10 Hz. The plots of normalized microscale show little depthwise variations. The plots of normalized macroscale show an S-shaped pattern in all the data

Turbulence Measurements in Open-channel Flow with Transverse Bed Slope

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (279 download)

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Book Synopsis Turbulence Measurements in Open-channel Flow with Transverse Bed Slope by : Ka Leung Lee

Download or read book Turbulence Measurements in Open-channel Flow with Transverse Bed Slope written by Ka Leung Lee and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a meandering river, both the bends and the transverse bed slopes influence the turbulence in the flow. As part of a research project to study the turbulence characteristics in a meandering laboratory river channel, turbulence measurements were made in a straight flume with a transversely sloping plane bed to evaluate the effect of the transverse bed slope. The flume was 30 in. wide and had a 10% transverse bed slope. The bottom of the flume was formed by sand of 2 mm nominal size coated with paint. The depths were 0.4 in. on the shallow side and 3.5 in. on the deep side. The average velocity was 1.3 ft/s. Constant temperature hot film anemometry was used and all measurements were made with single sensor probes. Some problems encountered in the application of hot film anemometry are discussed. A detailed account of the development of the techniques for data acquisition, processing and analysis is also given. The parameters used to characterize the turbulence include the mean velocity, turbulent intensity, autocorrelation coefficient, cross-correlation coefficient, spectrum, macroscale, Taylor microscale, energy dissipation rate, Kolmogorov microscale, and skewness and kurtosis of the probability distribution of the velocity fluctuations. Some of the variations of these parameters can be attributed to the depth variation and velocity variation across the flume. The mean velocities on a vertical normalized with respect to the depth-averaged velocity were found to vary in a similar way with the relative depth for different verticals. The same observation is obtained for the relative turbulent intensity, the energy dissipation rate and the Kolmogorov micro-length scale. For the other parameters, interesting patterns of variation can be identified. These findings will be compared with those of similar measurements in the meandering laboratory river channel so that the effect of transverse bed slope on the turbulence in natural river flow can be evaluated

Summary of Turbulence Data from Rivers, Conveyance Channels, and Laboratory Flumes

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ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Summary of Turbulence Data from Rivers, Conveyance Channels, and Laboratory Flumes by : Raul S. McQuivey

Download or read book Summary of Turbulence Data from Rivers, Conveyance Channels, and Laboratory Flumes written by Raul S. McQuivey and published by . This book was released on 1973 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Summary of Turbulence Data from Rivers, Conveyance Channels, and Laboratory Flumes

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ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Summary of Turbulence Data from Rivers, Conveyance Channels, and Laboratory Flumes by : Raul S. McQuivey

Download or read book Summary of Turbulence Data from Rivers, Conveyance Channels, and Laboratory Flumes written by Raul S. McQuivey and published by . This book was released on 1972 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Turbulence in Open Channels and River Flows

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Publisher : CRC Press
ISBN 13 : 100061073X
Total Pages : 303 pages
Book Rating : 4.0/5 (6 download)

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Book Synopsis Turbulence in Open Channels and River Flows by : Michio Sanjou

Download or read book Turbulence in Open Channels and River Flows written by Michio Sanjou and published by CRC Press. This book was released on 2022-07-20 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulence in Open Channel and River Flows covers turbulence and related fluid mechanics in open-channel flows, addressing both basic mechanisms and their applications. It helps readers understand the organized motion involved in turbulent flow and apply this understanding to the practice of hydraulic engineering, including mass and sediment transport. Chapters cover mathematical expansion procedures and basic fluid mechanics to help readers understand essentially physical phenomena, and present special techniques for measurement and accurate direct observation of open-channel turbulence in laboratory flumes or natural rivers. Topics related to environmental management and turbulence-related disasters are addressed. Includes detailed mathematical expansions and supporting supplements in an appendix Presents the mathematics and fluid mechanics needed to understand turbulence in open channels Includes experimental topics from the author’s research, encouraging readers to measure and accurately observe turbulence in laboratories and rivers The book is ideal for graduate students, researchers and engineers in hydraulics and hydromechanics.

Meandering Streamflows: Patterns and Processes across Landscapes and Scales

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Publisher : Geological Society of London
ISBN 13 : 1786205971
Total Pages : 320 pages
Book Rating : 4.7/5 (862 download)

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Book Synopsis Meandering Streamflows: Patterns and Processes across Landscapes and Scales by : A. Finotello

Download or read book Meandering Streamflows: Patterns and Processes across Landscapes and Scales written by A. Finotello and published by Geological Society of London. This book was released on 2024-10-02 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meandering patterns shaped by fluid flows are found over a broad range of landscapes, from bedrock channels to rivers and estuaries, deep-marine environments, supraglacial streams and other planets such as Mars and Venus. During the last six decades, meanders have been widely investigated by researchers from different fields, such as fluid mechanics, geomorphology, ecology, civil- and petroleum engineering, and geology. This volume seeks to push the science of meandering forward by bringing together insights gained from field, laboratory and numerical investigations of meandering streams found in distinct environmental and geological contexts. The authors pay particular attention to the interactions between autogenic and allogenic processes that affect meander kinematics and the resulting morphology, sedimentology and stratigraphic architecture. The findings presented in this volume contribute to a better understanding of stream meandering in diverse settings, with broad implications for stream and wetland restoration, land management, infrastructure design, oil exploration and production, carbon sequestration, hazard mitigation and planetary palaeoenvironmental reconstructions.

Turbulence in River and Maritime Hydraulics

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Publisher : MDPI
ISBN 13 : 303897594X
Total Pages : 286 pages
Book Rating : 4.0/5 (389 download)

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Book Synopsis Turbulence in River and Maritime Hydraulics by : Michele Mossa

Download or read book Turbulence in River and Maritime Hydraulics written by Michele Mossa and published by MDPI. This book was released on 2019-03-08 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding of the role of turbulence in controlling transport processes is of paramount importance for the preservation and protection of aquatic ecosystems, the minimization of the deleterious consequences of anthropogenic activity, and the successful sustainable development of river and maritime areas. In this context, the present Special Issue collects 15 papers which provide a representation of the present understanding of turbulent processes and their effects in river and maritime environments. The presented collection of papers is not exhaustive, but it highlights the key priority areas and knowledge gaps in this field of research. The published papers present the state-of-the-art knowledge of complex environmental flows which are useful for researchers and practitioners. The paper contents are an overview of some recent topics of research and an exposure of the current and future challenges associated with these topics.

Turbulence Measurements in Rivers and Tidal Channels

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ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (256 download)

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Book Synopsis Turbulence Measurements in Rivers and Tidal Channels by : John Vincent Russell

Download or read book Turbulence Measurements in Rivers and Tidal Channels written by John Vincent Russell and published by . This book was released on 1976 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Turbulence in Open Channel Flows

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Publisher : Routledge
ISBN 13 : 1351406604
Total Pages : 246 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Turbulence in Open Channel Flows by : Hiroji Nakagawa

Download or read book Turbulence in Open Channel Flows written by Hiroji Nakagawa and published by Routledge. This book was released on 2017-10-02 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of open channel turbulence, focusing especially on certain features stemming from the presence of the free surface and the bed of a river. Part one presents the statistical theory of turbulence; Part two addresses the coherent structures in open-channel flows and boundary layers.

Advances in Fluid Modeling & Turbulence Measurements

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Publisher : World Scientific
ISBN 13 : 9810249314
Total Pages : 888 pages
Book Rating : 4.8/5 (12 download)

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Book Synopsis Advances in Fluid Modeling & Turbulence Measurements by : Hisashi Ninokata

Download or read book Advances in Fluid Modeling & Turbulence Measurements written by Hisashi Ninokata and published by World Scientific. This book was released on 2002 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an essential reference for engineers and scientists working in the field of turbulence. It covers a variety of applications, such as: turbulence measurements; mathematical and numerical modeling of turbulence; thermal hydraulics; applications for civil, mechanical and nuclear engineering; environmental fluid mechanics; river and open channel flows; coastal problems; ground water.

Turbulent Flow in Two-stage Meandering Channels

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (117 download)

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Book Synopsis Turbulent Flow in Two-stage Meandering Channels by : Yasunori Muto

Download or read book Turbulent Flow in Two-stage Meandering Channels written by Yasunori Muto and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow in two-stage channels with meandering main channels was investigated. The meandering channels with rectangular and trapezoidal cross sections, of which the sinuosities were 1.093, 1.370 and 1.571, were constructed in a small experimental flume. A 2 component fibre optic laser Doppler anemometer was used in the velocity and turbulence measurements. Based on a great number of three-component velocity measurements in meandering channels for overbank flow, very detailed analyses of the mean flow and turbulent characteristics were undertaken. The velocity distributions were changed around the bankfull level through the interaction between the main channel flow and the flood plain flow in the crossover region. Strong secondary flow in the main channel and large Reynolds stresses at the interface were observed. These internal structures and the fluid mixing were attributed to the energy loss mechanism and hence to the conveyance capacity of the channel. Turbulence characteristics showed a strong 3 dimensional nature of the flow. Based on an analysis of three existing methods for stage-discharge prediction, a new method was developed by introducing several new parameters taking the effects of secondary flow and turbulence into account. The model gave quite good predictions for discharges. The applicability of the eddy viscosity concept to compound meandering flow was examined. The variation of the non-dimensional eddy viscosity indicated that a value of (......... ) could be applicable to meandering channel flow in both inbank and overbank conditions.

Report

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Publisher :
ISBN 13 :
Total Pages : 696 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Report by : United States. National Bureau of Standards

Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Treatise on Geomorphology

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Publisher : Academic Press
ISBN 13 : 0080885225
Total Pages : 6392 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Treatise on Geomorphology by :

Download or read book Treatise on Geomorphology written by and published by Academic Press. This book was released on 2013-02-27 with total page 6392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changing focus and approach of geomorphic research suggests that the time is opportune for a summary of the state of discipline. The number of peer-reviewed papers published in geomorphic journals has grown steadily for more than two decades and, more importantly, the diversity of authors with respect to geographic location and disciplinary background (geography, geology, ecology, civil engineering, computer science, geographic information science, and others) has expanded dramatically. As more good minds are drawn to geomorphology, and the breadth of the peer-reviewed literature grows, an effective summary of contemporary geomorphic knowledge becomes increasingly difficult. The fourteen volumes of this Treatise on Geomorphology will provide an important reference for users from undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic. Information on the historical development of diverse topics within geomorphology provides context for ongoing research; discussion of research strategies, equipment, and field methods, laboratory experiments, and numerical simulations reflect the multiple approaches to understanding Earth’s surfaces; and summaries of outstanding research questions highlight future challenges and suggest productive new avenues for research. Our future ability to adapt to geomorphic changes in the critical zone very much hinges upon how well landform scientists comprehend the dynamics of Earth’s diverse surfaces. This Treatise on Geomorphology provides a useful synthesis of the state of the discipline, as well as highlighting productive research directions, that Educators and students/researchers will find useful. Geomorphology has advanced greatly in the last 10 years to become a very interdisciplinary field. Undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic will find the answers they need in this broad reference work which has been designed and written to accommodate their diverse backgrounds and levels of understanding Editor-in-Chief, Prof. J. F. Shroder of the University of Nebraska at Omaha, is past president of the QG&G section of the Geological Society of America and present Trustee of the GSA Foundation, while being well respected in the geomorphology research community and having won numerous awards in the field. A host of noted international geomorphologists have contributed state-of-the-art chapters to the work. Readers can be guaranteed that every chapter in this extensive work has been critically reviewed for consistency and accuracy by the World expert Volume Editors and by the Editor-in-Chief himself No other reference work exists in the area of Geomorphology that offers the breadth and depth of information contained in this 14-volume masterpiece. From the foundations and history of geomorphology through to geomorphological innovations and computer modelling, and the past and future states of landform science, no "stone" has been left unturned!

NBS Special Publication

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Publisher :
ISBN 13 :
Total Pages : 1164 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis NBS Special Publication by :

Download or read book NBS Special Publication written by and published by . This book was released on 1918 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Spatio-Temporal Analysis

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Publisher : CRC Press
ISBN 13 : 0415408156
Total Pages : 2385 pages
Book Rating : 4.4/5 (154 download)

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Book Synopsis Advances in Spatio-Temporal Analysis by : Xinming Tang

Download or read book Advances in Spatio-Temporal Analysis written by Xinming Tang and published by CRC Press. This book was released on 2007-08-23 with total page 2385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in Geographic Information Technology have raised the expectations of users. A static map is no longer enough; there is now demand for a dynamic representation. Time is of great importance when operating on real world geographical phenomena, especially when these are dynamic. Researchers in the field of Temporal Geographical Information Systems (TGIS) have been developing methods of incorporating time into geographical information systems. Spatio-temporal analysis embodies spatial modelling, spatio-temporal modelling and spatial reasoning and data mining. Advances in Spatio-Temporal Analysis contributes to the field of spatio-temporal analysis, presenting innovative ideas and examples that reflect current progress and achievements.

Hydraulic Research in the United States

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Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Hydraulic Research in the United States by :

Download or read book Hydraulic Research in the United States written by and published by . This book was released on 1966 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Turbulent Flow in Two-stage Meandering Channels

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Turbulent Flow in Two-stage Meandering Channels by : Yasunori Muto

Download or read book Turbulent Flow in Two-stage Meandering Channels written by Yasunori Muto and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: