{"id":41857,"date":"1999-01-01T00:00:00","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/bifurcacions-secundaries-en-el-flux-de-taylor-couette\/"},"modified":"1999-01-01T00:00:00","modified_gmt":"1999-01-01T00:00:00","slug":"bifurcacions-secundaries-en-el-flux-de-taylor-couette","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/bifurcacions-secundaries-en-el-flux-de-taylor-couette\/","title":{"rendered":"Bifurcacions secundaries en el flux de taylor-couette."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Josefina AntoniJuan  Rull <\/strong><\/h2>\n<p>El problema de taylor-coette estudia la din\u00e1mica de un flu\u00eddo confinado entre dos cilindros coaxiales que giran con velocidades de rotaci\u00f3n independientes. Este sistema presenta una gran variedad de flujos, desde el flujo de couette cuando las velocidades de rotaci\u00f3n son bajas, hasta flujos turbulentos para velocidades altas. En la ruta hacia el caos hay una sucesi\u00f3n de transiciones a flujos que rompen las simetr\u00edas espacio-tiempo del problema.  en la tesis se han profundizado dos aspectos del problema; la din\u00e1mica no-lineal de uno de los flujos en contrarotaci\u00f3n, el flujo espiral y el estudio de las bifurcaciones secundarias en el caso de corotaci\u00f3n.  el problema se ha estudiado mediante la simulaci\u00f3n num\u00e9rica directa de las ecuaciones de navier-stokes y \u00e9stas se han formulado seg\u00fan potenciales escalares.  un estudio exhaustivo de las soluciones, cuando varian diferentes par\u00e1metros del problema, requiere de m\u00e9todos eficientes para integrar las ecuaciones. Se han discretizado las ecuaciones usando m\u00e9todos espectrales y se ha constru\u00eddo un algoritmo de continuaci\u00f3n que permite encontrar soluciones de ecuaciones diferenciales no lineales dependientes de un par\u00e1metro, adem\u00e1s de detectar bifurcaciones y hacer un seguimiento de las ramas de soluciones estacionarias.  el flujo espiral se calcula con las ecuaciones de navier-stokes en un sistema de referencia en rotaci\u00f3n y imponiendo la simetr\u00eda helicoidal que lo caracteriza. Se estudia el dominio de existencia del flujo espiral, el comportamiento para velocidades de rotaci\u00f3n altas, la estabilidad frente a perturbaciones helicoidales y el estudio de las trayectorias de las part\u00edculas del flu\u00eddo.  las bifurcaciones secundarias en corotaci\u00f3n se obtienen mediante un an\u00e1lisis de estabilidad lineal de los v\u00f3rtices de taylor frente a perturbaciones con dependencia acimutal. El problema de valores propios asociado se separa en dos subproblemas, seg\u00fan si el campo<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Bifurcacions secundaries en el flux de taylor-couette.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Bifurcacions secundaries en el flux de taylor-couette. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Josefina AntoniJuan  Rull <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1999<\/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> Sanchez Umbria Juan  J.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Carlos Perez garcia <\/li>\n<li>Francisco Marqu\u00e9s truyol (vocal)<\/li>\n<li>Jes\u00fas Sal\u00e1n santos (vocal)<\/li>\n<li>carles Batlle arnau (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Josefina AntoniJuan Rull El problema de taylor-coette estudia la din\u00e1mica de un flu\u00eddo confinado entre dos cilindros [&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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