Book ChapterDOI
The Role of Skin-Friction Measurements in Boundary Layers with Variable Pressure Gradients
Hans-Hermann Fernholz
- pp 231-240
TLDR
A survey of skin-friction measurements is presented in combination with mean velocity measurements in incompressible two-dimensional turbulent boundary layers with variable pressure gradients in the streamwise direction as discussed by the authors.Abstract:
A survey of skin-friction measurements is presented in combination with mean velocity measurements in incompressible two-dimensional turbulent boundary layers with variable pressure gradients in the streamwise direction. The most important techniques over a span of 100 years will be discussed and compared if possible under the same flow conditions.read more
Citations
More filters
Journal ArticleDOI
Pressure-gradient-dependent logarithmic laws in sink flow turbulent boundary layers
Shivsai Ajit Dixit,O. N. Ramesh +1 more
TL;DR: In this paper, a theory based on matched asymptotic expansions was developed to explain the experimentally observed variations of log-law constants with the non-dimensional pressure gradient parameter (Δp=(ν/ρU3τ)dp/dx).
Journal ArticleDOI
Determination of skin friction in strong pressure-gradient equilibrium and near-equilibrium turbulent boundary layers
Shivsai Ajit Dixit,O. N. Ramesh +1 more
TL;DR: In this article, the modified Clauser-chart method was used to estimate local skin friction in strongly accelerated or retarded equilibrium and near-equilibrium turbulent boundary layers that are not very close to relaminarization or separation.
Journal ArticleDOI
Instantaneous wall-shear-stress measurements: advances and application to near-wall extreme events
Ramis Örlü,Ricardo Vinuesa +1 more
Pressure-gradient-dependent logarithmic laws in sink flow turbulent boundary layers
TL;DR: In this paper, the system of partial differential equations governing the mean flow was reduced to inner and outer ordinary differential equations in self-preserving form, valid for sink flow conditions.
References
More filters
Book ChapterDOI
Über Flüssigkeitsbewegung bei sehr kleiner Reibung
TL;DR: In der klassischen Hydrodynamik wird vorwiegend die Bewegung der reibungslosen Flussigkeit behandelt as discussed by the authors, deren Ansatz durch physikalische Beobachtungen wohl bestatigt ist.
Journal ArticleDOI
Calibration of the Preston tube and limitations on its use in pressure gradients
TL;DR: In this paper, it is shown that in sufficiently strong favorable and adverse pressure gradients the inner-law velocity distribution breaks down completely, and it is suggested that this breakdown is associated with reversion to 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.
Related Papers (5)
Direct measurements of wall shear stress by buried wire gages in a shock-wave boundary-layer interaction region
V. S. Murthy,W. C. Rose +1 more
The influence of pressure gradient on the turbulent boundary layer over a rough surface.
Victor E. Scottron,John L. Power +1 more