{"id":33610,"date":"2018-03-09T09:30:49","date_gmt":"2018-03-09T09:30:49","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/contribuciones-a-la-tecnica-de-velocimetria-por-imagen-de-particulas-piv\/"},"modified":"2018-03-09T09:30:49","modified_gmt":"2018-03-09T09:30:49","slug":"contribuciones-a-la-tecnica-de-velocimetria-por-imagen-de-particulas-piv","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/contribuciones-a-la-tecnica-de-velocimetria-por-imagen-de-particulas-piv\/","title":{"rendered":"Contribuciones a la tecnica de velocimetria por imagen de particulas (piv)."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jos\u00e9 Ignacio Nogueira Goriba <\/strong><\/h2>\n<p>Se analiza la t\u00e9cnica de velocimetr\u00eda por imagen de part\u00edculas (piv) en correlaci\u00f3n cruzada, al objeto de aumentar su resoluci\u00f3n espacial y disminuir su sensibilidad frente a sembrado no homog\u00e9neo. En particular, se aborda el problema de resolver frecuencias espaciales inferiores al tama\u00f1o de la ventana de interrogaci\u00f3n, tomando como punto de partida la t\u00e9cnica de compensaci\u00f3n de deformaciones del patr\u00f3n de part\u00edculas, se demuestra que el uso de la media m\u00f3vil en la ventana de interrogaci\u00f3n es inestable cuando existen frecuencias espaciales m\u00e1s peque\u00f1as que el tama\u00f1o de la ventana de interrogaci\u00f3n. A continuaci\u00f3n, se desarrollan algoritmos de ponderaci\u00f3n que eliminan el mecanismo de la inestabilidad y tienden a minimizar el error introducido por la aplicaci\u00f3n recursiva de la t\u00e9cnica de compensaci\u00f3n del patr\u00f3n de part\u00edculas. El m\u00e9todo mejorado se analiza mediante campos de velocidad bidimensional generados artificialmente. De esta forma es posible comparar el m\u00e9todo desarrollado con los m\u00e9todos standard actualmente utilizados en piv. Adicionalmente, se identifica un par\u00e1metro de calidad de medida que puede ser utilizado como criterio de convergencia del algoritmo de compensaci\u00f3n modificado. Asimismo, se desarrollan filtros de interpolaci\u00f3n cuyo objetivo es mejorar la respuesta de la medida frente a sembrados no homog\u00e9neos. Los algoritmos generados son finalmente utilizados en una serie de flujos reales con naturaleza muy dispar, al objeto de comprobar los beneficios del m\u00e9todo en casos de aplicaci\u00f3n real.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Contribuciones a la tecnica de velocimetria por imagen de particulas (piv).<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Contribuciones a la tecnica de velocimetria por imagen de particulas (piv). <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jos\u00e9 Ignacio Nogueira Goriba <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/12\/1997<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Antonio Lecuona Neumann<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: manuel Rodriguez fernandez <\/li>\n<li>pedro Garcia ibarra (vocal)<\/li>\n<li>pedro acisclo Rodriguez aumente (vocal)<\/li>\n<li>alejandro Feo palacios (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jos\u00e9 Ignacio Nogueira Goriba Se analiza la t\u00e9cnica de velocimetr\u00eda por imagen de part\u00edculas (piv) en correlaci\u00f3n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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