Journal ArticleDOI
The two-dimensional turbulent wall-jet
W. H. Schwarz,W. P. Cosart +1 more
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In this paper, the mean velocity distribution of the incompressible, turbulent, plane wall-jet has been examined in some detail with the aid of a hot-wire anemometer.Abstract:
With the aid of a hot-wire anemometer, the mean velocity distribution of the incompressible, turbulent, plane wall-jet has been examined in some detail. As previously reported, this fully developed boundary layer belongs to the class of self-preserving flows. Over the entire range of experimental conditions, a single velocity scale , the Boussinesq exchange coefficient e, and the shear stress at the wall have been evaluated. The Reynolds number based on the maximum velocity and the thickness of the boundary layer varied from 22,000 to 106,000.read more
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Book ChapterDOI
Heat and Mass Transfer between Impinging Gas Jets and Solid Surfaces
TL;DR: In this article, the authors present a comprehensive survey emphasizing the engineering applications and empirical equations, presented for the prediction of heat and mass transfer coefficients within a large and technologically important range of variables.
Journal ArticleDOI
Self-accelerating turbidity currents
TL;DR: In this article, approximate layer-averaged equations describing the mechanics of turbid underflows are derived and the authors show that the self-acceleration predicted by the three-equation model is so strong that the energy constraint fails to be satisfied.
Journal ArticleDOI
Longshore currents generated by obliquely incident sea waves: 2
TL;DR: In this article, the authors proposed a profile of the longshore current, as a function of distance from the swash line, using the concept of radiation stress (introduced in an earlier paper) together with a horizontal eddy viscosity μe of the form μe = ρNx(gh)1/2, where ρ is the density, x is the distance offshore, g is gravity, h is the local mean depth, and N is a numerical constant.
Journal ArticleDOI
The turbulent wall jet
Brian Launder,Wolfgang Rodi +1 more
TL;DR: There have been well over two hundred experimental studies published on the turbulent wall jet as mentioned in this paper, of which about one half have been prompted by heat transfer considerations and in most of these cases the flow field has been insufficiently well documented to merit close attention for the present purpose.
Journal ArticleDOI
On the applicability of various scaling laws to the turbulent wall jet
TL;DR: In this article, the authors measured the spatial distribution of the mean velocity in a two-dimensional turbulent wall jet and determined that the bulk of the flow is self-similar and it depends on the momentum flux at the nozzle and on the viscosity and density of the fluid.
References
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Journal ArticleDOI
The wall jet
TL;DR: In this article, the authors considered the flow due to a jet spreading out over a plane surface, either radially or in two dimensions, and obtained a similarity solution for laminar flow.
Journal ArticleDOI
The Determination of Turbulent Skin Friction by Means of Pitot Tubes
TL;DR: In this article, a simple method of determining local turbulent skin friction on a smooth surface has been developed which utilises a round pitot tube resting on the surface, assuming the existence of a region near the surface in which conditions are functions only of the skin friction, the relevant physical constants of the fluid and a suitable length, a universal non-dimensional relation is obtained for the difference between the total pressure recorded by the tube and the static pressure at the wall, in terms of skin friction.
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An experimental investigation of a wall jet
TL;DR: In this paper, an experimental investigation of a turbulent low-speed jet of air spreading out radially over a flat smooth plate was carried out to determine the mean velocity distribution and rate of growth of the wall jet, and it was found that the velocity profiles are similar and that the rate of change of velocity and width of the jet can be expressed by simple power-laws.
Journal ArticleDOI
Measurements of Skin Friction in a Plane Turbulent Wall Jet
TL;DR: In this paper, an experimental investigation of the distribution of skin friction along the wall of a plane turbulent wall jet is presented, and the measurements show that it is possible to describe the variation in skin friction coefficient by a formula similar to the Blasius formula which is based on experimental results of turbulent pipe flow.
Journal ArticleDOI
Experimental Data on Turbulent Wall Jets: A Correlation of Existing Data
TL;DR: In this article, the wall jet was used to protect refractories in steel-making furnaces from ice and fog formation on the inside surface of aircraft windshields, which was described by Glauert, Jacob et al., and also by Sigalla and Painz.