The article discusses different metrological problems connected with the use of a hot-wire technique in the measurement of turbulence energy dissipation. In particular a short review of the experimental evidence for and against the local isotropy hypothesis is presented and its consequence for the design of hot-wire systems and data processing is discussed. Finally, the finite spatial resolution of a hot-wire technique is analysed with special emphasis on measurement of the dissipation rate and the correction of experimental results.
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Elsner et al. (1996) studied this question.
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