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Experimental and Numerical Analysis of Opaque Turbulent Buoyant Jet
Author(s): A. B. Osman, M. Ovinis, Fakhruldin Hashim, I. Faye
Keywords: Deepwater Horizon, optical technique, cross-correlation, k-epsilon model
Opaque fluid flow estimation is a challenging problem due to the complex nature of the turbulent surface flow. Due to large applications of an opaque fluid, this paper focused on estimating and analyzing such type of flow. To simulate the opaque fluid a turbulent buoyant jet was experimentally simulated for various ranges of nozzle flow rates. Then, a video camera was used to capture the jet flow. In order to estimate the velocity field of jet flow, a time-averaged based on Fast Fourier Transform (FFT) was proposed. Then, the outcomes of experimental work were compared to the results of CFD simulation for the same ranges of flow rates. The FFT-based algorithm estimated the nozzle flow rate with a relative error of 18.2%. However, a good agreement between experimental and numerical simulation was found in term of the overall velocity field, centerline velocity, axial velocity as well as radial velocity of jet flow. Therefore, by improving the accuracy of FFT, the estimation of real opaque fluid from the image sequence is a promising.