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The velocity and vorticity vector fields of a turbulent boundary layer. Part 1. Simultaneous measurement by hot-wire anemometry

Published online by Cambridge University Press:  26 April 2006

Petar Vukoslavĉević ,
James M. Wallace  and
Jean-Louis Balint
Petar Vukoslavĉević
Affiliation:
Department of Mechanical Engineering, The University of Maryland, College Park, MD 20742, USA
James M. Wallace
Affiliation:
Department of Mechanical Engineering, The University of Maryland, College Park, MD 20742, USA
Jean-Louis Balint
Affiliation:
Department of Mechanical Engineering, The University of Maryland, College Park, MD 20742, USA
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Abstract

A nine-sensor hot-wire probe is described which is capable of simultaneously measuring the velocity and vorticity vectors with a spatial resolution of about six Kolmogorov microscales just above the viscous sublayer in a thick turbulent boundary layer at a Reynolds number of Rθ = 2685. Results from tests of the probe performance are presented to show that the three velocity components at each of its three arrays are measured with sufficient accuracy to allow determination of velocity gradients and from them the vorticity vector. Measurements with this probe of statistical properties of the velocity and vorticity fields of the turbulent boundary layer are given in Part 2 of this paper. When compared to the results of others, they further demonstrate the capability of this probe to measure simultaneously the velocity and vorticity vectors in turbulent flows of low to moderate Reynolds numbers.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 228 , July 1991 , pp. 25 - 51
Copyright
© 1991 Cambridge University Press

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