Measurement of Turbulence by V-Shaped Hot Wire

Spatial resolution correction for hot-wire anemometry in wall turbulence

We investigate spatial resolution issues in hot-wire anemometry measurements of turbulence intensity and energy spectra. Single normal hot-wire measurements are simulated by means of filtering direct numerical simulation (DNS) of turbulent channel flow at Res 1⁄4 934. Through analysis of the two-dimensional energy spectra from the DNS, the attenuation of the small-scale energy levels is documen...

The Hot - wire Anemometer for Turbulence Measurements part III

Hot-wire spatial resolution issues in wall-bounded turbulence

N. HUTCHINS, T. B. NICKELS, I. MARUSIC and M. S. CHONG Journal of Fluid Mechanics / Volume 635 / September 2009, pp 103 ­ 136 DOI: 10.1017/S0022112009007721, Published online: 10 September 2009 Link to this article: http://journals.cambridge.org/abstract_S0022112009007721 How to cite this article: N. HUTCHINS, T. B. NICKELS, I. MARUSIC and M. S. CHONG (2009). Hot­wire spatial resolution issues ...

Hot-wire Array for Turbulence Research in Subgrid-scale Modeling

Modeling of turbulence for Large Eddy Simulations (LES) must be based on sound understanding of the relationships between large and small scales. In order to study flows with a large range of active length-scales, high Reynolds number experimental data can be used. Thermal anemometry provides the possibility of acquiring long records of turbulence data, which are necessary for evaluating statis...

Hot-Wire Attenuation and Its Correction in Turbulence Measurements

A scheme is proposed for correcting the hot-wire attenuation in turbulence measurements in both frequency and time domains. The scheme is tested for simulated hot-wire signals under velocity impulse and sinusoidal perturbations of various frequencies. It is found that the frequency response of the hotwire system and the calculated central moments, after applying the correction, can be greatly i...