Measuring substance velocity in zone of gravitational turbulent gas mixing at low Reynolds numbers

A. V. Pavlenko, A. A. Tyaktev, I. L. Bugaenko

Russian Federal Nuclear Center E. I. Zababakhin All-Russian Scientific Research Institute of Technical Physics, Snezhinsk

Abstract: We have measured the distribution of the velocity of a tracking substance in the zone of the gravitational turbulent mixing of two gases with different densities, which is caused by the development of Rayleigh–Taylor instability in the gravitational field. The velocity field has been studied using a single-component laser Doppler anemometer, which allowed the temporal variation of the moduli of vertical and horizontal components of the tracking substance velocity projection to be determined in unstable mixing systems with the Atwood numbers of 0.23 and 0.83.

Received: 12.11.2010

 English version: Technical Physics Letters, 2011, 37:6, 491–493

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