Two Dimensional Self Preserving Turbulent Jets In Streaming Flow
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Two Dimensional Self Preserving Turbulent Jets In Streaming Flow
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Author : Fekete, G. I
language : en
Publisher:
Release Date : 1970
Two Dimensional Self Preserving Turbulent Jets In Streaming Flow written by Fekete, G. I and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
Self Preserving Two Dimensional Turbulent Jets And Wall Jets In A Moving Stream
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Author : Rajnikant Purshottam Patel
language : en
Publisher:
Release Date : 1961
Self Preserving Two Dimensional Turbulent Jets And Wall Jets In A Moving Stream written by Rajnikant Purshottam Patel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with categories.
The Streamwise Development Of Two Dimensional Wall Jets And Other Two Dimensional Turbulent Shear Flows
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Author : Ian S. Gartshore
language : en
Publisher:
Release Date : 1965
The Streamwise Development Of Two Dimensional Wall Jets And Other Two Dimensional Turbulent Shear Flows written by Ian S. Gartshore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Shear flow categories.
Self Preserving Two Dimensional Jets In Streaming Flow Microform
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Author : George Ivan Fekete
language : en
Publisher: National Library of Canada
Release Date : 1970
Self Preserving Two Dimensional Jets In Streaming Flow Microform written by George Ivan Fekete and has been published by National Library of Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Jets categories.
Self Preserving Two Dimensional Jets In Streaming Flow
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Author : George Ivan Fekete
language : en
Publisher:
Release Date : 1970
Self Preserving Two Dimensional Jets In Streaming Flow written by George Ivan Fekete and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Jets categories.
An Analytic Solution For Flow Development Of Symmetric Self Preserving Jets And Wakes Using An Integral Method
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Author : W. M. Vogel
language : en
Publisher:
Release Date : 1969
An Analytic Solution For Flow Development Of Symmetric Self Preserving Jets And Wakes Using An Integral Method written by W. M. Vogel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.
A closed form solution is developed for the rate of growth and shear stress parameter of symmetric, self-preserving wakes and jets in streaming flow. A universal shape for the mean velocity profile is assumed and enables the approximate turbulent boundary layer equation to be integrated across the flow. By choosing two different limits for the integration, two equations are developed, one of which depends on the turbulent stress at a particular non-dimensional distance from the axis of symmetry. A semi-empirical expression is developed, relating the turbulent shear stress to the ratio of the mean longitudinal rate of strain to the mean shear. This is used to give an analytical solution for the growth parameters for the full range of self-preserving jets and wakes. The theory differs in one important detail from that of Gartshore in that the axis along which the longitudinal rate of strain is identified is not the axis of symmetry but is near to the locus of inflection points of the mean velocity profile. Graphs of the functions are given for both two-dimensional and axisymmetric flow. (Author).
Dynamics Of Quasi Two Dimensional Turbulent Jets
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Author : Julien Rémy Dominique Gérard Landel
language : en
Publisher:
Release Date : 2012
Dynamics Of Quasi Two Dimensional Turbulent Jets written by Julien Rémy Dominique Gérard Landel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The study of quasi-two-dimensional turbulent jets is relevant to chemical reactors, the coking process in oil refinement, as well as rivers flowing into lakes or oceans. In the event of a spillage of pollutants into a river, it is critical to understand how these agents disperse with the flow in order to assess damage to the environment. For such flows, characteristic streamwise and cross-stream dimensions can be much larger than the fluid-layer thickness, and so the flow develops in a confined environment. When the distance away from the discharge location is larger than ten times the fluid-layer thickness, the flow is referred to as a quasi-two-dimensional jet. From experimental observations using dyed jets and particle image velocimetry, we find that the structure of a quasi-two-dimensional jet consists of a high-speed meandering core with large counter-rotating eddies developing on alternate sides of the core. The core and eddy structure is self-similar with distance from the discharge location. The Gaussianity of the cross-stream distribution of the time-averaged velocity is due, in part, to the sinuous instability of the core. To understand the transport and dispersion properties of quasi-two-dimensional jets we use a time-dependent advection--diffusion equation, with a mixing length hypothesis accounting for the turbulent eddy diffusivity. The model is supported by experimental releases of dye in jets or numerical releases of virtual passive tracers in experimentally-measured jet velocity fields. We consider the statistical properties of this flow by releasing and then tracking large clusters of virtual particles in the jet velocity field. The probability distributions of two-point properties (such as the distance between two particles) reveal large streamwise dispersion. Owing to this streamwise dispersive effect, a significant amount of tracers can be transported faster than the speed predicted by a simple advection model. Using potential theory, we determine the flow induced by a quasi-two-dimensional jet confined in a rectangular domain. The streamlines of the induced flow predicted by the theory agree with experimental measurements away from the jet boundary. Finally, we investigate the case of a quasi-two-dimensional particle-laden jet. Depending on the bulk concentration of dense particles, we identify different flow regimes. At low concentrations, the jet features the same core and eddy structure observed without the particles, and thus quasi-two-dimensional jet theory can apply to some extent. At larger concentrations, we observe an oscillating instability of the particle-laden jet.
On The Two Dimensional Turbulent Jet
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Author : I. Wignanski
language : en
Publisher:
Release Date : 1973
On The Two Dimensional Turbulent Jet written by I. Wignanski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with categories.
Results from hot wire measurements in a plane incompressible jet are reported. The flow was found to be self preserving at distances greater than 40 diameters and measurements were made beyond 120 diameters. The quantities measured include mean velocities, turbulence intensities, third and fourth order terms, as well as two point correlations and intermittency. Conditional sampling techniques were used to obtain data exclusively with the turbulent zone of the jet. The results are compared with previous investigations. This is a third paper in a sequel which provides data on turbulent free shear flows. (Author).
The Change In Momentum Of A Two Dimensional Incompressible Turbulent Jet Due To A Wire Screen Normal To The Flow Microform
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Author : Douglas M. (Douglas Maitland) Bruce
language : en
Publisher: National Library of Canada
Release Date : 1966
The Change In Momentum Of A Two Dimensional Incompressible Turbulent Jet Due To A Wire Screen Normal To The Flow Microform written by Douglas M. (Douglas Maitland) Bruce and has been published by National Library of Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
"This thesis describes a theoretical and experimental investigation of a two-dimensional, turbulent jet flowing, at incompressible speeds, onto a screen placed at right angles to the flow. Five wire screens with square mesh and open area ratios ranging form 0.34 to 0.66 were tested over a range of Reynolds numbers. Attention was focussed on the loss of momentum of the flow through the screen and the subsequent development of the flow downstream. For the screens with relatively large open area ratios, there was a tendency for the jet profiles to return to a self-preserving shape downstream. For the more solid screens, however, the flow tended to develop downstream as two separate diverging jets. [...]" --
The Turbulent Wall Jet In An Arbitrary Pressure Gradient
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Author : I. S. Gartshore
language : en
Publisher:
Release Date : 1967
The Turbulent Wall Jet In An Arbitrary Pressure Gradient written by I. S. Gartshore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
A method for calculating the growth of a turbulent wall jet in streaming flow was developed. The flow is assumed to be two-dimensional, incompressible and over a plane, smooth wall. Downstream variations of pressure are permitted and separation in an adverse pressure gradient may be predicted. The method incorporates procedures for matching the flow to that at the blowing slot, although it is postulated that the upstream boundary layer there is thin enough that the wall jet develops without an unmixed wake (i.e. there is not a minimum in the mean-velocity profile). The method incorporates four integral momentum equations taken from the wall to various points in the flow. The calculation of the outer shearing stress, although empirical, is based on the large-eddy equilibrium hypothesis and therefore has some foundation. The remaining empiricism in the method is based on measurements in self-preserving wall jets. The method was used to predict the jet-momentum coefficient required to suppress separation over a trailing-edge flap attached to a thin aerofoil. Plausible curves have been obtained using assumed values of upstream boundary layer at the slot. (Author).