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Turbulent Flow Around Bluff Bodies
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Book Synopsis Turbulent Flow Around Bluff Bodies at the Floodplain Edge by : Fiona Heatlie
Download or read book Turbulent Flow Around Bluff Bodies at the Floodplain Edge written by Fiona Heatlie and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the flow around bluff bodies placed at the floodplain edge in a compound, open channel. The floodplain edge location is associated with a strong shear layer between lower velocity floodplain flow and high velocity flow in the main channel. The drag force exerted by a bluff body is dependant on the way in which the flow separates around the body and subsequently recovers but the drag coefficients typically used to represent the effects of bluff bodies are based on experiments on bodies in geometrically simple channels. The differences induced in the wake structures and therefore in the drag coefficients of bluff bodies when they are placed in the shear layer at the floodplain edge are little understood. In this study, experimental data is gathered that allows direct comparison of the wakes of identical bluff bodies, both emergent (surface-piercing) and submerged, in simple and compound open channels. For the compound channel scenarios, for both single and multiple block arrangements, turbulence data is also reported. These results are augmented using a computational model based on the solution of the 3D Reynolds Averaged Navier Stokes equations, using a non-linear turbulence model. The results show that the changes induced in the wake structures due to their location at the floodplain edge of the compound channel can have a significant effect on the drag coefficient. For the emergent bodies, the proximity of the deep main channel flow is shown to impact in a complex manner upon the processes of reattachment and re-separation, changing the formation of vorticity in the wake. For the submerged bodies, this is complicated by asymmetry in the same processes on the block top. For both body types, separation on the main channel side results in the creation of a strong axial circulation at the floodplain edge and the decay of the wake is asymmetrically affected by the differing behaviour of the turbulence on the two sides.
Book Synopsis Turbulent Flow Around Bluff Bodies by : H.G. Regeer
Download or read book Turbulent Flow Around Bluff Bodies written by H.G. Regeer and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Twenty-First Symposium on Naval Hydrodynamics by : National Research Council
Download or read book Twenty-First Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 1997-09-11 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bluff Body Aerodynamics and Its Applications by : Manabu Ito
Download or read book Bluff Body Aerodynamics and Its Applications written by Manabu Ito and published by Elsevier Publishing Company. This book was released on 1990 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increasing slenderness and lightness of civil engineering structures such as tower blocks and bridges, wind effects on them have been attracting considerable interest from researchers and design engineers. Since most structures in civil engineering present bluff forms to the wind, the main emphasis of this collection of papers is on bluff body aerodynamics. The flow effects in this case, in addition to turbulence effects in the atmospheric boundary layer illustrate the unique and complex nature of the problems that can be encountered in this field, as opposed to the classical studies in the aeronautical field that influenced the initial development stages of industrial aerodynamics. Selected papers from the colloquium are presented in this volume. The papers offer a comprehensive presentation of the results of the studies made of wind effects on engineering structures. The latest trends in the field are outlined and the results obtained in the solution of topical problems are described.
Download or read book Flow Around Bluff Bodies written by and published by . This book was released on 1984 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unsteady Simulations of Turbulent Flow Behind a Triangular Bluff Body by : Ravi K. Madabhushi
Download or read book Unsteady Simulations of Turbulent Flow Behind a Triangular Bluff Body written by Ravi K. Madabhushi and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Secret Measurements of the Flow Around Bluff Bodies in Smooth and Turbulent Streams by : P. W. Bearman
Download or read book Some Secret Measurements of the Flow Around Bluff Bodies in Smooth and Turbulent Streams written by P. W. Bearman and published by . This book was released on 1972 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three-dimensional turbulent flow past rectangular bluff bodies by : Dubravka Vasilić Melling
Download or read book Three-dimensional turbulent flow past rectangular bluff bodies written by Dubravka Vasilić Melling and published by . This book was released on 1977 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Galloping of an Elastically Supported Bluff Body in Turbulent Flow by : Qiang Li
Download or read book Galloping of an Elastically Supported Bluff Body in Turbulent Flow written by Qiang Li and published by . This book was released on 1987 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Image Velocimetry by : Markus Raffel
Download or read book Particle Image Velocimetry written by Markus Raffel and published by Springer Science & Business Media. This book was released on 2007-08-09 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Book Synopsis Numerical Prediction of Turbulent Flow and Aerodynamic Loading on Bluff Bodies by : Jaeyong Chung
Download or read book Numerical Prediction of Turbulent Flow and Aerodynamic Loading on Bluff Bodies written by Jaeyong Chung and published by . This book was released on 2005 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of a Locally-forced, Periodic Excitation on the Drag Coefficient for a Bluff Body in Turbulent Flow by : Daniel Christopher Alanko
Download or read book The Effect of a Locally-forced, Periodic Excitation on the Drag Coefficient for a Bluff Body in Turbulent Flow written by Daniel Christopher Alanko and published by . This book was released on 2004 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculation of Separted, Nonstationary, Two Dimensional, Turbulent Flows Around Bluff Bodies Using Reynolds Stress Closure Turbulence Modeling by : Brian Richard Smith
Download or read book Calculation of Separted, Nonstationary, Two Dimensional, Turbulent Flows Around Bluff Bodies Using Reynolds Stress Closure Turbulence Modeling written by Brian Richard Smith and published by . This book was released on 1987 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Prediction of Turbulent Flows Behind Bluff Bodies by Using an Algebraic Stress Model by : Venkata S. Kodali
Download or read book Prediction of Turbulent Flows Behind Bluff Bodies by Using an Algebraic Stress Model written by Venkata S. Kodali and published by . This book was released on 1985 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Control Techniques and Applications by : Jinjun Wang
Download or read book Flow Control Techniques and Applications written by Jinjun Wang and published by Cambridge University Press. This book was released on 2019 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master the theory, applications and control mechanisms of flow control techniques.
Book Synopsis Proceedings of the Fourth International Conference on Wind Effects on Buildings and Structures by : Keith John Eaton
Download or read book Proceedings of the Fourth International Conference on Wind Effects on Buildings and Structures written by Keith John Eaton and published by Cambridge University Press. This book was released on 1977 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes developments in the areas of meteorology, aerodynamics and structural engineering, which effects the wind on buildings and structures.
Book Synopsis An Experimental Study of Surface-mounted Bluff Bodies Immersed in Thick Turbulent Boundary Layers by : Helen Afi Amorin
Download or read book An Experimental Study of Surface-mounted Bluff Bodies Immersed in Thick Turbulent Boundary Layers written by Helen Afi Amorin and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a study of an experimental investigation of the effects of spanwise aspect ratio on the turbulent properties of separation bubbles over a surface-mounted bluff body. In this study, the streamwise aspect ratio was kept constant at [...]/h = 2.36 and the spanwise aspect ratio was varied from 1 to 20. The body was immersed in a turbulent boundary layer whose thickness is equivalent to 4.8 times the body height. The Reynolds number, based on the body height and freestream velocity, was 12500. A time-resolved particle image velocimetry (TR-PIV) method was used to measure the velocity field within the separation bubble to quantify the influence of varying spanwise aspect ratio on the mean flow and turbulent characteristics. Two distinct separation bubbles developed on top and downstream of the bluff bodies. The results showed that the reattachment lengths of both separation bubbles are influenced by the aspect ratio; they increased monotonically as aspect ratio increased from [...]/h = 1 to 8, and reach asymptotic values and do not vary significantly with aspect ratio larger than 8. The effects of aspect ratios on the mean velocities, Reynolds stresses, triple velocity correlations and turbulence production are also examined over the bluff body. Galilean decomposition, quadrant decomposition, joint probability density function (JPDF), two-point auto-correlation function and proper orthogonal decomposition (POD) are also used to investigate the impact of spanwise aspect ratio on the structures present in the flow field.
