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A Numerical And Experimental Study Of Turbulent Single And Multiphase Forced Plumes And Jets At Moderate Reynolds Numbers
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Book Synopsis A Numerical and Experimental Study of Turbulent Single and Multiphase Forced Plumes and Jets at Moderate Reynolds Numbers by : Gordon N. Taub
Download or read book A Numerical and Experimental Study of Turbulent Single and Multiphase Forced Plumes and Jets at Moderate Reynolds Numbers written by Gordon N. Taub and published by . This book was released on 2013 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flows where a narrow body of fluid, carried by initial momentum or buoyancy, entrains an ambient fluid are common in the environment. Volcanoes, smoke exiting a chimney or rising from a forest fire, tornadoes and deep water oil spills are just a few examples. If the main driving force is momentum we term such a flow a jet. On the other hand, if the main driving force is buoyancy we typically refer to the flow as a plume. Perhaps more common, initial momentum and buoyancy are both present in which case we can refer to the flow as either a buoyant jet or a forced plume. Forced plumes can be either single phase, where buoyancy is caused by either a difference in temperature or some other scalar phenomenon, or multiphase where buoyancy is due to the injection of particles, bubbles or drops of material other than the ambient fluid into the flow. In this study single and multiphase jets and plumes will be examined. A laminar study will be presented which examines the effect of the addition of a small amount of nonzero angular momentum to jets and plumes. The results of direct numerical simulations of a pure jet, a pure plume and a forced plume, in the turbulent, moderate Reynolds number regime are presented and compared. Each simulation was run long enough so that time averaged third order statistics converged, allowing each term of the turbulent kinetic energy equation and Reynolds stress transport equations to be calculated directly. The results of laboratory experiments of a pure jet and multiphase plume, conducted at Ecole Nationale Superieure De Mecanique et D'Aerotechnique (ENSMA) located in Poitiers, France will be presented. Preliminary results of multiphase plume simulations using the Equilibrium-Eulerian technique will be discussed.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Experiments in Homogeneous Turbulence by : Robert Sugden Rogallo
Download or read book Numerical Experiments in Homogeneous Turbulence written by Robert Sugden Rogallo and published by . This book was released on 1981 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Jets and Plumes by : Joseph Hun-wei Lee
Download or read book Turbulent Jets and Plumes written by Joseph Hun-wei Lee and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jets and plumes are shear flows produced by momentum and buoyancy forces. Examples include smokestack emissions, fires and volcano eruptions, deep sea vents, thermals, sewage discharges, thermal effluents from power stations, and ocean dumping of sludge. Knowledge of turbulent mixing by jets and plumes is important for environmental control, impact and risk assessment. Turbulent Jets and Plumes introduces the fundamental concepts and develops a Lagrangian approach to model these shear flows. This theme persists throughout the text, starting from simple cases and building towards the practically important case of a turbulent buoyant jet in a density-stratified crossflow. Basic ideas are illustrated by ample use of flow visualization using the laser-induced fluorescence technique. The text includes many illustrative worked examples, comparisons of model predictions with laboratory and field data, and classroom tested problems. An interactive PC-based virtual-reality modelling software (VISJET) is also provided. Engineering and science students, researchers and practitioners may use the book both as an introduction to the subject and as a reference in hydraulics and environmental fluid mechanics.
Book Synopsis Coherent Structures in Turbulent Flows by : Duncan Burnette Bryant
Download or read book Coherent Structures in Turbulent Flows written by Duncan Burnette Bryant and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents the turbulence of multiphase plumes and tidal vortices by studying and quantifying coherent structures that affect the dynamics of the flow. The measurements presented in this dissertation were taken using particle image velocimetry (PIV). After preprocessing the images and conducting the PIV analysis to get the final velocity fields, the local swirl strength was used to identify coherent structures (vortices) in the flow. This dissertation used the identified vortices to quantify the turbulent properties of the flows. The mean and turbulent properties of bubble plumes are found to be self-similar within the measured air flow rates when appropriately nondimensionalized. The timeaveraged velocity profile was shown to have a Gaussian distribution when nondimensionalized by the centerline velocity and plume radius. The bubble plumes were found to have the most energetic vortices along the plume edge and a modulated turbulent energy spectrum with a slope in the inertial subrange from -7/6 instead of the classical -5/3. The mean and turbulent properties of an inertial particle plume are presented, revealing the time-averaged velocity and vorticity profiles to be self-similar for all cases when nondimesionalized by the centerline velocity and plume radius. The average vortex properties were not self-similar for all flow cases with the largest two particles sizes being self-similar and the smallest particle vortex properties being similar to bubble plume data. Despite the difference in vortex properties, the turbulent energy spectra in inertial particle plumes followed the same modulation as the bubble plumes. PIV experiments from the tidal starting-jet vortices detail the influence of a finite channel length using identified vortice. The results show the trajectory and development of the tidal starting-jet vortices to be changed by a region of vorticity that develops inside the channel and is expelled as a vortex during the ebb tide. This expelled lateral boundary layer vortex is shown to move the starting-jet vortex away from the tidal jet shear layer thus reducing the input vorticity. When the expelled boundary layer vortex strength is 1/5 the starting-jet vortex the system dynamics change resulting in a deviation in the starting-jet vortices' trajectory. This dissertation successfully uses the local swirl strength to quantify the turbulence of multiphase plumes and tidal starting-jet vortices. Using these results, engineers will be able to better predict the efficiency of CO2 ocean sequestration and tidal flushing. Furthermore, the techniques of quantifying coherent structures developed in this dissertation can be applied to a multitude of turbulent flows.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Herman Branover Publisher :AIAA (American Institute of Aeronautics & Astronautics) ISBN 13 : Total Pages :384 pages Book Rating :4.3/5 (91 download)
Book Synopsis Advances in Turbulence Studies by : Herman Branover
Download or read book Advances in Turbulence Studies written by Herman Branover and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1993 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Free Surface Turbulence by : Guido Troiani
Download or read book Free Surface Turbulence written by Guido Troiani and published by . This book was released on 2004 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Numerical and Experimental Investigation of Adverse Pressure Gradient Turbulent Flows by : Giridhar Chukkapalli
Download or read book A Numerical and Experimental Investigation of Adverse Pressure Gradient Turbulent Flows written by Giridhar Chukkapalli and published by . This book was released on 1993 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Study of High Reynolds Number Turbulence in the Atmosphere by : Brindesh R. Dhruva
Download or read book An Experimental Study of High Reynolds Number Turbulence in the Atmosphere written by Brindesh R. Dhruva and published by . This book was released on 2000 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of Model Turbulent Plumes in Stable Atmosphere by : Satish Bhaskar Suryawanshi
Download or read book Experimental Study of Model Turbulent Plumes in Stable Atmosphere written by Satish Bhaskar Suryawanshi and published by . This book was released on 1971 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamental Problematic Issues in Turbulence by : Albert Gyr
Download or read book Fundamental Problematic Issues in Turbulence written by Albert Gyr and published by Birkhäuser. This book was released on 2012-12-06 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of contributions on a variety of mathematical, physical and engineering subjects related to turbulence. Topics include mathematical issues, control and related problems, observational aspects, two- and quasi-two-dimensional flows, basic aspects of turbulence modeling, statistical issues and passive scalars.
Book Synopsis Experiments on a Round Turbulent Buoyant Plume by : Aamir Shabbir
Download or read book Experiments on a Round Turbulent Buoyant Plume written by Aamir Shabbir and published by . This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plumes and Jets in Semi-confined Spaces by : Yi-Jiun Peter Lin
Download or read book Plumes and Jets in Semi-confined Spaces written by Yi-Jiun Peter Lin and published by . This book was released on 2003 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress in Turbulence Research by : Yeshajahu Unger
Download or read book Progress in Turbulence Research written by Yeshajahu Unger and published by AIAA. This book was released on 1994 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2007 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of Particle-generated Turbulence in the Final Decay Period by : Kyungjin Lee
Download or read book Experimental Study of Particle-generated Turbulence in the Final Decay Period written by Kyungjin Lee and published by . This book was released on 2004 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
