Date of Award
Mechanical, Automotive, and Materials Engineering
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The objectives of this study are to develop the necessary algorithms for performing a digital whole-field frequency domain filtering technique, and to investigate the effect of parameters such as filter shape and location, image resolution and particle size on the visibility of the whole-field isovelocity fringes. Computer generated images are used instead of actual photographs in order to allow an evaluation of the method. Particles are distributed uniformly on a regular grid in the field of study and their new locations after short time intervals are determined using the prescribed flow equations. Four flow patterns considered in this study are: Couette flow, Poiseuille flow, stagnation flow and impinging flow. Actual and ideal isovelocity fringes are presented for each flow pattern. The filter used in this study is a square binary filter located on the desired frequency axis. This study shows that increasing camera resolution produces a broader frequency spectrum which includes higher frequency components. Since the particle distribution in an actual flow is highly random, the effect of randomness in particle distribution is discussed. (Abstract shortened by UMI.)Dept. of Mechanical, Automotive, and Materials Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1992 .L377. Source: Masters Abstracts International, Volume: 31-04, page: 1820. Thesis (M.A.Sc.)--University of Windsor (Canada), 1992.
Larijani, Rambod Fayaz., "Parametric study of a digital whole-field measurement technique for two-dimensional flow." (1992). Electronic Theses and Dissertations. 2996.