{"id":56150,"date":"2018-03-09T22:43:51","date_gmt":"2018-03-09T22:43:51","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/direct-numerical-simulation-of-turbulent-dispersion-of-buoyant-plumes-in-a-pressure-driven-channel-flow\/"},"modified":"2018-03-09T22:43:51","modified_gmt":"2018-03-09T22:43:51","slug":"direct-numerical-simulation-of-turbulent-dispersion-of-buoyant-plumes-in-a-pressure-driven-channel-flow","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ingenieria-y-tecnologia-mecanicas\/direct-numerical-simulation-of-turbulent-dispersion-of-buoyant-plumes-in-a-pressure-driven-channel-flow\/","title":{"rendered":"Direct numerical simulation of turbulent dispersion of buoyant plumes in a pressure-driven channel flow"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Alexandre Fabregat Tom\u00c1\u00a0s <\/strong><\/h2>\n<p>El objetivo principal de este trabajo es el estudio de la transferencia turbulenta de calor en un flujo totalmente desarrollado en un canal mediante la simulaci\u00f3n num\u00e9rica directa (dns). En estas simulaciones se resuelven expl\u00edcitamente todas las escalas existentes en el flujo turbulento de manera que, incluso para n\u00fameros de reynolds moderados, las mallas de discretizaci\u00f3n deben ser lo suficientemente finas como para capturar las estructuras m\u00e1s peque\u00f1as existentes en el flujo y, consecuentemente, los requisitos computacionales de las dns suelen ser considerables. El flujo, forzado por un gradiente de presi\u00f3n medio constante, est\u00e1 confinado entre dos paredes finas, paralelas e infinitas separadas una distancia 2d. El flujo turbulento de calor se ha estudiado en tres configuraciones de canal distintas: caso a: pluma generada por un escalar introducido desde una fuente lineal en un canal horizontal caso b: convecci\u00f3n mixta en la direcci\u00f3n principal de flujo (canal vertical) caso c: pluma con flotaci\u00f3n generada por una fuente lineal en un canal horizontal en el caso b el flujo de calor se genera debido a la diferencia de temperaturas existente entre las dos paredes del canal. El vector de gravedad queda alineado con la direcci\u00f3n principal del flujo y los n\u00fameros de grashof, reynolds y prandtl son gr = 9.6 \u00c2\u00b7 106, ret = 150 y pr = 0.71 respectivamente. cerca de la pared caliente, la flotaci\u00f3n y el gradiente de presi\u00f3n medio act\u00faan conjuntamente provocando un aumento en la velocidad en comparaci\u00f3n con el caso de convecci\u00f3n puramente forzada. Contrariamente, cerca de la pared fr\u00eda, la flotaci\u00f3n se opone al flujo y consecuentemente la velocidad disminuye. Los casos a y c son similares ya que en ambos un fluido caliente se introduce en el flujo fr\u00edo a trav\u00e9s de una fuente lineal centrada verticalmente en la entrada del canal. La altura de la fuente es 0.054d. El fluido introducido se dispersa formando una pluma que es transportada aguas abajo en<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Direct numerical simulation of turbulent dispersion of buoyant plumes in a pressure-driven channel flow<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Direct numerical simulation of turbulent dispersion of buoyant plumes in a pressure-driven channel flow <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Alexandre Fabregat Tom\u00c1\u00a0s <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Rovira i virgili<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/12\/2006<\/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>Ildefonso Cuesta Romeo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Grau vidal  francesc xavier <\/li>\n<li>\u00ed\u00a0ngel Jim\u00e9nez aranda (vocal)<\/li>\n<li>josep Bonet \u00e1valos (vocal)<\/li>\n<li>inmaculada Iglesias (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Alexandre Fabregat Tom\u00c1\u00a0s El objetivo principal de este trabajo es el estudio de la transferencia turbulenta de [&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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