Determination of Derivative Moments using Two Slanted Hot-Wires and a Spectral method
Journal article, 1993

A method to determine derivative moments using slanted hot-wires and a spectral method has been developed. The general idea is to minimize measuring volume by using only two hot-wires, and a post-processing of the measurement data. It is shown that the spectral method is equivalent to conventional determinations of correlations. The method developed has been tested in the self-preserving region of a plane wake by computing profiles of the Reynolds stresses as well as the derivative moments in the expression for the total energy dissipation. One term in this expression, which with conventional methods requires two triple-wires or four cross-wires, has been determined using the spectral method.


Lennart Löfdahl

Chalmers, Department of Thermo and Fluid Dynamics

Bert Johansson

Chalmers, Department of Thermo and Fluid Dynamics

Jöran Bergh

University of Gothenburg

Department of Mathematics

Mikael Lerner

Chalmers, Department of Radio and Space Science

Experiments in Fluids

Vol. 15 393-400

Subject Categories

Fluid Mechanics and Acoustics

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