HIGH-ACCURACY PARTICLE POSITIONING TOGETHER WITH OPTIMUM DATA DISPLAY FOR VELOCIMETRY APPLICATIONS

dc.contributorFernando Mendoza_Santoyo
dc.creatorDAVID MORENO HERNANDEZ
dc.date2000-11
dc.date.accessioned2023-07-21T15:15:28Z
dc.date.available2023-07-21T15:15:28Z
dc.identifierhttp://cio.repositorioinstitucional.mx/jspui/handle/1002/937
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7725707
dc.description"Three-dimensional position and velocity information can be extracted by directly analysing the diffraction patterns of seeding particles in imaging velocimetry using realtime CCD cameras. The Generalised Lorenz-Mie theory is shown to yield quantitative accurate models of particle position, such that it can be deduced from typical experimental particle images with an accuracy of the order of 20 µm and an error of 11 grey levels RMS, data obtained by comparing theoretical and experimental images. Both, the theory and experimental verification of the problem presented here are discussed. This thesis present also 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."
dc.formatapplication/pdf
dc.languageeng
dc.relationcitation:Moreno Hernández, (2000). "High-accuracy particle positioning together with optimum data display for velocimetry applications". Tesis de Doctorado en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 103 pp.
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Autor/Particle image velocimetry
dc.subjectinfo:eu-repo/classification/Autor/3D PIV
dc.subjectinfo:eu-repo/classification/Autor/Spherical particles
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/22
dc.subjectinfo:eu-repo/classification/cti/2209
dc.subjectinfo:eu-repo/classification/cti/2209
dc.titleHIGH-ACCURACY PARTICLE POSITIONING TOGETHER WITH OPTIMUM DATA DISPLAY FOR VELOCIMETRY APPLICATIONS
dc.typeinfo:eu-repo/semantics/doctoralThesis
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageLeón, Guanajuato
dc.audiencegeneralPublic


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