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Velocity and temperature derivatives in high-Reynolds-number turbulent flows in the atmospheric surface layer. Part 2. Accelerations and related matters

Published online by Cambridge University Press:  08 October 2007

G. GULITSKI
Affiliation:
Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
M. KHOLMYANSKY
Affiliation:
Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
W. KINZELBACH
Affiliation:
Institute of Environmental Engineering, ETH Zürich, CH-8093 Zürich, Switzerland
B. LÜTHI
Affiliation:
Institute of Environmental Engineering, ETH Zürich, CH-8093 Zürich, Switzerland
A. TSINOBER
Affiliation:
Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
S. YORISH
Affiliation:
Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel

Abstract

We report the first results of an experiment, in which explicit information on all velocity derivatives (the nine spatial derivatives, ∂uixj, and the three temporal derivatives, ∂ui/∂t) along with the three components of velocity fluctuations at a Reynolds number as high as Reλ~104 is obtained. No use of the Taylor hypothesis was made, and this allowed us to obtain a variety of results concerning acceleration and its different Eulerian components along with vorticity, strain and other small-scale quantities. The field experiments were performed at five heights between 0.8 and 10m above the ground.

The report consists of three parts. Part 1 is devoted to the description of facilities, methods and some general results. Part 2 concerns accelerations and related matters. Part 3 is devoted to the issues concerning temperature with the emphasis on joint statistics of temperature and velocity derivatives.

Type
Papers
Copyright
Copyright © Cambridge University Press 2007

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