Flow Field Determination in Nearly Isotropic Turbulence of Any Intensity by Hot-wire Anemometry
نویسندگان
چکیده
منابع مشابه
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...
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We report the first evidence of an enhancement of the heat transfer from a heated wire to an external turbulent coflow of superfluid helium. We used a standard Pt-Rh hot-wire anemometer and overheat it up to 21 K in a pressurized liquid helium turbulent round jet at temperatures between 1.9 K and 2.12 K. The null-velocity response of the sensor can be satisfactorily modeled by the counterflow m...
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Ultrasonic flow measurement technology has the potential to significantly improve flow measurement accuracy beyond that presently achieved. However, current applications fail to achieve theoretical accuracies because of turbulence effects on ultrasonic wave transit time. Herein, the ultrasonic flowmeter equation is reconsidered, where the effects of turbulent velocity and sound speed fluctuatio...
متن کاملHot-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 ...
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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...
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ژورنال
عنوان ژورنال: Bulletin of JSME
سال: 1981
ISSN: 0021-3764,1881-1426
DOI: 10.1299/jsme1958.24.175