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http://cio.repositorioinstitucional.mx/jspui/handle/1002/916| DEVELOPMENT OF THE PARTICLE IMAGE VELOCIMETRY (PIV) TECHNIQUE FOR THREE DIMENSIONS: TUNNELING VELOCIMETRY | |
| J. Ascención Guerrero Viramontes | |
| Fernando Mendoza_Santoyo | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| 3D-PIV Velocity measurement Temperature measurements Diffraction Tunneling velocimetry | |
| "Conventional velocimetry has an intrinsic limitation because it yields 2D data, neglecting the third velocity component. For this reason, 3D-PIV has recently evolved as an area of research with success at the cost of increasing complexity in its methodology. The increased complexity and the limited optical access found in most industrial applications, meant that many of the 3D-PIV techniques, although of academic interest, cannot be used in practical industrial applications. For practical applications restricted viewing eliminates stereoscopic approaches. Lack of robustness and ease to perform an experiment make of conventional holography an unattractive option due to the fact that it involves a wet developing process, hence is very slow to yield results. However, its large depth of field and storing capacity makes it a technique that should, under the correct environment, be used. Scanning light-sheets are difficult to obtain for restricted optical access and high speeds, so they have not been tried in industrial conditions. The required capabilities for 3D real-time measurement include the following three aspects: illumination of a volume rather than a plane, particle positioning in 3D from 2D camera information, and positioning calculation at low-magnification. Three-dimensional position and velocity information can be extracted by directly analyzing the diffraction patterns of seeding particles in imaging velocimetry using real-time CCD cameras. The Generalised Lorenz-Mie theory is shown to yield quantitative accurate models of particle position, such that it can be deduced with good accuracy from typical experimental particle images. Tunneling Velocimetry, the proposed technique to perform 3D velocity measurements, is able to provide the means to obtain particle images in a volume of interest rather than on a light sheet. Moreover, with this technique pressure and temperature measurements are feasible from the system background surface. The research reported here is concentrated in the experimental characterization of Tunneling Velocimetry and the problems involved with it. A discussion of the preliminary results is presented." | |
| 2002-02 | |
| Tesis de doctorado | |
| Inglés | |
| León, Guanajuato | |
| Público en general | |
| Guerrero Viramontes, (2002). "Development of the Particle Image Velocimetry (PIV) technique for three dimensions: Tunneling velocimetry". Tesis de Doctorado en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 102 pp. | |
| FÍSICA DE FLUÍDOS | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | DOCTORADO EN CIENCIAS (ÓPTICA) |
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