An optimum velocimetry data display method |
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Authors: | D. Moreno F. Mendoza Santoyo M. Funes-Gallanzi S. Fernandez Orozco |
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Affiliation: | a Centro de Investigaciones en Optica A.C., Lomas del Bosque 15, Col. Lomas del Campestre, León, 37150 Gto, Mexico;b Instituto Nacional de Astrofisica, Optica & Electronica, Luis Enrique Erro, Tonantzintla, Pue, Mexico;c A.S.C.I S.A. de C.V., J. Guadalupe Zuno 901, Guadalajara, Jal., Mexico |
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Abstract: | This paper proposes a method which determines the optimum grid size for interpolated velocimetry data, without making any priori assumptions about the velocity fields, the system used or analysis method. The method employs condition number as the main criterion for deciding the adequate grid size for a given data set. Data sets displayed accordingly are directly comparable, independently of differing experimental parameters or data processing methods. The discussion is based on computational fluid dynamics (CFD) data of flow past the near wake of a cylinder from which simulated PIV images were generated. These images were analysed with the proposed method and the velocity estimates compared to the CFD data. The method was also applied to a sample PIV image of turbulent flow in a baffled tube. |
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Keywords: | Particle image velocimetry (PIV) Data display method Optimum grid size Computational fluid dynamics |
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