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Mohammadi Razi E, Shokoohi R. Investigation the effects of temperature gradients and distance from heat source on isotropy of convective air turbulent medium using moiré based wave front sensor. ICOP & ICPET _ INPC _ ICOFS 2018; 24 :873-876
URL: http://opsi.ir/article-1-1433-en.html
URL: http://opsi.ir/article-1-1433-en.html
1- University of Bojnord
Abstract: (2753 Views)
In this paper the isotropy of convective air turbulence in different heights from heat source and in presence of different temperature gradients has been investigated using study of phase structure function (PSF). Accordingly for having controlled conditions, the convective air turbulence similar to atmospheric mode was produced using electrical heater in the lab. The plane wave was propagated through the turbulent medium. The light's Wave front was reconstructed using moiré based wave front sensor at the end of the turbulence path. Using the wave front sensor data, the phase structure function of the light was calculated in two directions, perpendicular to the light beam path. Comparison of PSF in two directions, the isotropy of turbulent medium has been studied in presence of different temperature gradients and in different height from heat source. Experimental results show that the laboratory convective air turbulence is anisotropic medium. In addition, the anisotropy was strong in high temperature gradients and near the heat source
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