INTERFEROMETRIC DATA ANALYSIS OF CONVECTIVE HEAT TRANSFER UNDER A DOWNWARD-FACING HORIZONTAL CIRCULAR PLATE

Interferometric data are analyzed to investigate heat transfer under a heated horizontal circular plate suspended in air at ambient temperature. To achieve an accurate reconstruction of the axisymmetric temperature fi eld, the twodimensional continuous wavelet transform and the Chebyshev wavelet method are used in the fringe shift process and in the Abel inversion, respectively. The results obtained are evidence for good agreement with the Nusselt number correlation given in the previous work. For the investigated Rayleigh numbers, the medium is axisymmetric and stratifi ed in the vicinity of the plate. The accuracy of interferometric techniques is very sensitive to the methods used in the post-processing of the interferometric data.
   
Author:  A. Ait Haj Said, M. Elfagrich, Y. Dahanic
Keywords:  natural convection, circular plate, downward-facing plate, holographic interferometry, wavelet transformation, Abel inversion, Nusselt number
Page:  636