Viscous Wall Region Structure in High and Low Reynolds Number Turbulent Boundary Layers
Author : J. C. Klewicki
Publisher :
Page : pages
File Size : 24,26 MB
Release : 1996
Category :
ISBN :
The Structure of High Reynolds Number Turbulent Boundary Layers
Author : James G.. Brasseur
Publisher :
Page : 30 pages
File Size : 47,92 MB
Release : 1994
Category : Reynolds number
ISBN :
Book Description
The Structure of High Reynolds Number Turbulent Boundary Layers
Author : Alexander J. Smits
Publisher :
Page : 50 pages
File Size : 14,41 MB
Release : 1993
Category : Reynolds number
ISBN :
Book Description
An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer
Author : Peter W. Runstadler
Publisher :
Page : 326 pages
File Size : 42,8 MB
Release : 1963
Category : Boundary layer
ISBN :
Book Description
A combination of visual and quantitative measurements is presented, providing a physical picture of the turbulent boundary layer flow structure on a flat plate. The flow structure is shown to consist of three zones, each zone has a one to one correspondence to the well known regions of the u+, y+ mean velocity profile. A wall layer region is shown to exist below y+ = 10. An apparently fully turbulent region exists corresponding to the logarithmic ''law of the wall'' and the ''buffer'' region. An intermittent zone appears to agree closely with the ''wake'' deviation region. An entirely new result of the investigation is the delineation of the structure of the wall layer region. This region is shown to contain a relatively regular structure of low and high velocity fluid streaks alternating in the span direction, together with the ejection of low momentum fluid into the outer flow. Correlations are given for the rate of ejection and the streak spacing. A qualitative description of other features of the wall layer region and the character of the remainder of the boundary layer flow structure is presented. (Author).
An Investigation of Turbulence Structure in a Low-Reynolds-number Incompressible Turbulent Boundary Layer
Author : Constantine John Strataridakis
Publisher :
Page : 378 pages
File Size : 50,31 MB
Release : 1989
Category :
ISBN :
Book Description
Turbulent Flow Structure Near Walls
Author : J. D. A. Walker
Publisher :
Page : 184 pages
File Size : 23,16 MB
Release : 1991
Category : Boundary value problems
ISBN :
Book Description
In the past decade, progress has been made in determining the nature of turbulent flow near walls. Many of these advances, which have occurred through new experimental methodologies, direct numerical simulations, and new theoretical developments, are described in this volume.
The Structure of High Reynolds Number Turbulent Boundary Layers, Part A.
Author :
Publisher :
Page : 0 pages
File Size : 45,25 MB
Release : 1994
Category :
ISBN :
Book Description
We provide a summary of our accomplishments under a three-year 'mini URI' program in collaboration with researchers at Yale and Princeton universities. Whereas the central theme of the program is high Reynolds number wall-bounded turbulence, studies at Penn State included (1) analysis of fundamental issues of scale interactions in high Reynolds number turbulence dynamics, (2) the use of the wavelet decomposition and generalized filtering techniques in describing the relationship between the Fourier-spectral description of scale and the physical-space description of structure, (3) direct numerical simulation of passive scalar sources in low Reynolds number turbulent boundary layers and analysis of scalar evolution in relationship to laboratory data, (4) the relationship between homogeneous turbulent shear flow and the inertial sublayer in high Reynolds number turbulent boundary layers, and (5) the development and application of sophisticated data analysis techniques which intimately combine graphical and quantitative analysis within a fully interactive 'Analytical Environment'. A brief summary of the accomplishments in each area of development is presented. Turbulence, Turbulent boundary layers, Shear flows.
An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer
Author : P. W. Runstadler
Publisher :
Page : 346 pages
File Size : 50,99 MB
Release : 1963
Category : Boundary layer
ISBN :
Book Description
A combination of visual and quantitative measurements is presented, providing a physical picture of the turbulent boundary layer flow structure on a flat plate. The flow structure is shown to consist of three zones, each zone has a one to one correspondence to the well known regions of the u+, y+ mean velocity profile. A wall layer region is shown to exist below y+ = 10. An apparently fully turbulent region exists corresponding to the logarithmic ''law of the wall'' and the ''buffer'' region. An intermittent zone appears to agree closely with the ''wake'' deviation region. An entirely new result of the investigation is the delineation of the structure of the wall layer region. This region is shown to contain a relatively regular structure of low and high velocity fluid streaks alternating in the span direction, together with the ejection of low momentum fluid into the outer flow. Correlations are given for the rate of ejection and the streak spacing. A qualitative description of other features of the wall layer region and the character of the remainder of the boundary layer flow structure is presented. (Author).
Self-sustaining Mechanisms of Wall Turbulence
Author : Ronald Lee Panton
Publisher : Computational Mechanics
Page : 448 pages
File Size : 20,12 MB
Release : 1997
Category : Science
ISBN :
Book Description
Why is wall turbulence self-sustaining? In this book well-regarded researchers not only discuss what they know and believe, but also speculate on ideas that still require numerical or experimental testing and verification. An initial brief history of boundary layer structure research is followed by chapters on experimental information and specific topics within the subject. There are then sections on computational aspects.
Near-wall Turbulent Flows
Author : Ronald M. C. So
Publisher : Elsevier Publishing Company
Page : 1072 pages
File Size : 21,83 MB
Release : 1993
Category : Mathematics
ISBN :
Book Description
Knowledge of near-wall turbulence from experimental, theoretical and numerical sources is accumulating at an ever increasing rate. An overview of the latest important developments is reported and discussed in depth in this volume with the goal of stimulating closer dialogue between researchers in all areas of near-wall turbulence. The full text of 95 contributed papers cover a broad range of topics in near-wall turbulent flows that includes boundary layers, coherent structures, drag reduction, experimental methods, high speed flows, numerical simulations, transition and turbulent modeling. The innovativeness of the contributions demonstrates that near-wall turbulence remains a vital and dynamically evolving field with important technological consequences for the future.
