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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

Analysis of the velocity and temperature coupling in a plane mixing layer using variable temperature hot wire anemometry

page 12
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.850
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要約

The coupling of the velocity and temperature dynamics is studied in a non-isothermal mixing layer air flow using a new variable temperature hot wire anemometer, designed and implemented for the simultaneous measurement of velocity and temperature at the same point with a single wire. Temperature probability density functions are found to be non-marching in the development region and marching in the self-similarity region. The synchronism of the velocity-temperature measurements makes possible a fine analysis of the velocity and temperature fluctuations interactions in the turbulent mixing process: correlations, conditional probability density functions and quadrant analysis pointed out the dominance of saddle-point ejections in the eddy heat flux.

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