{"id":71142,"date":"2004-08-11T00:00:00","date_gmt":"2004-08-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/modelos-1-d-y-2-d-no-estacionarios-de-flujo-a-presion\/"},"modified":"2004-08-11T00:00:00","modified_gmt":"2004-08-11T00:00:00","slug":"modelos-1-d-y-2-d-no-estacionarios-de-flujo-a-presion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/modelos-1-d-y-2-d-no-estacionarios-de-flujo-a-presion\/","title":{"rendered":"Modelos 1-d y 2-d no estacionarios de flujo a presi\u00f3n."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  E\u00c1\u00a7a Guimaraes De Abreu Jos\u00e9 De <\/strong><\/h2>\n<p>La presente tesis profundiza en el estudio de los flujos no estacionarios en conductos a presi\u00f3n, un tema que comenz\u00f3 a desarrollarse a finales del siglo xix al comp\u00e1s de las grandes instalaciones hidroel\u00e9ctricas. Los conceptos y ecuaciones fundamentales de los flujos a presi\u00f3n quedan perfectamente establecidos pocos a\u00f1os despu\u00e9s, en particular en las primeras d\u00e9cadas del siglo xx. A partir de este momento, y dadas las insalvables dificultades que a la saz\u00f3n entra\u00f1a la resoluci\u00f3n anal\u00edtica de las ecuaciones diferenciales que modelan estos fen\u00f3menos, aparecen una serie de m\u00e9todos gr\u00e1ficos que permiten acercarse, de acuerdo con las posibilidades de entonces, a las soluciones de los problemas del modo m\u00e1s eficaz posible. Por ello hay que esperar hasta finales de la d\u00e9cada de los sesenta para que, de la mano del desarrollo de los ordenadores, el an\u00e1lisis de estos flujos vea un importante impulso. La posibilidad de resolver num\u00e9ricamente las ecuaciones, propiciar\u00e1 un gran avance en el conocimiento de estos flujos tanto que, una d\u00e9cada m\u00e1s tarde, la inmensa mayor\u00eda de problemas de inter\u00e9s ingenieril est\u00e1n pr\u00e1cticamente resueltos.Con todo quedan algunas sombras que impiden el pleno conocimiento de estos flujos. Algunas de ellas, como los flujos transitorios con rotura de la columna l\u00edquida (problemas de cavitaci\u00f3n y de aire atrapado) presentan notable complejidad, en buena medida consecuencia del total desconocimiento que existe acerca de la geometr\u00eda que puede adoptar la interfase de separaci\u00f3n de los fluidos. Tanta que a\u00fan no se atisba el momento en que puedan modelarse anticipando la completa y correcta evoluci\u00f3n del transitorio. Antes bien, hay que efectuar muy severas y restrictivas hip\u00f3tesis relativas a la geometr\u00eda de la interfase, para poder alcanzar soluciones concretas. Otras sombras, como el an\u00e1lisis de la fricci\u00f3n entre fluido y tuber\u00eda, el tema estelar de los \u00faltimos a\u00f1os en esta \u00e1rea, va a con<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Modelos 1-d y 2-d no estacionarios de flujo a presi\u00f3n.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Modelos 1-d y 2-d no estacionarios de flujo a presi\u00f3n. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  E\u00c1\u00a7a Guimaraes De Abreu Jos\u00e9 De <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 08\/11\/2004<\/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>Enrique Cabrera Marcet<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: fernando Seabra santos <\/li>\n<li> Betamio de almeida Antonio (vocal)<\/li>\n<li>Antonio Barrero ripoll (vocal)<\/li>\n<li>Miguel \u00e1ngel Losada rodr\u00edguez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de E\u00c1\u00a7a Guimaraes De Abreu Jos\u00e9 De La presente tesis profundiza en el estudio de los flujos no [&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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