{"id":47428,"date":"2019-11-04T09:57:04","date_gmt":"2019-11-04T08:57:04","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-conveccao-natural-exemplo-problema-com-solucao-definicao\/"},"modified":"2020-01-23T13:26:35","modified_gmt":"2020-01-23T12:26:35","slug":"o-que-e-conveccao-natural-exemplo-problema-com-solucao-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conveccao-natural-exemplo-problema-com-solucao-definicao\/","title":{"rendered":"O que \u00e9 Convec\u00e7\u00e3o Natural &#8211; Exemplo &#8211; Problema com Solu\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Convec\u00e7\u00e3o Natural &#8211; Exemplo &#8211; Problema com Solu\u00e7\u00e3o.\u00a0Determine o n\u00famero de Nusselt para convec\u00e7\u00e3o natural usando a correla\u00e7\u00e3o simples para uma placa plana vertical.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Exemplo: Convec\u00e7\u00e3o Natural &#8211; Placa Plana<\/h2>\n<p>Uma placa vertical de 10 cm de altura \u00e9 mantida a 261 \u00b0 C em \u00e1gua comprimida a 260 \u00b0 C (16MPa).\u00a0Determine o\u00a0<strong>n\u00famero de Nusselt<\/strong>\u00a0usando a correla\u00e7\u00e3o simples para uma placa plana vertical.<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-free-convection-equation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20653 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-free-convection-equation.png\" alt=\"exemplo - convec\u00e7\u00e3o livre - equa\u00e7\u00e3o\" width=\"515\" height=\"84\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-free-convection-equation.png\" \/><\/a><\/p>\n<p>Para calcular o n\u00famero de Rayleigh, precisamos saber:<\/p>\n<ul>\n<li>o coeficiente de expans\u00e3o t\u00e9rmica, que \u00e9:\u00a0<strong>\u03b2 = 0,0022<\/strong><\/li>\n<li>o\u00a0<a title=\"O que \u00e9 o n\u00famero Prandtl\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/introduction-to-heat-transfer\/characteristic-numbers\/what-is-prandtl-number\/\">n\u00famero de Prandtl<\/a>\u00a0(para 260 \u00b0 C), que \u00e9:\u00a0<strong>Pr = 0,87<\/strong><\/li>\n<li>a viscosidade cinem\u00e1tica (para 260 \u00b0 C), que \u00e9\u00a0<strong>\u03bd = 0,13 x 10\u00a0<sup>-6<\/sup><\/strong>\u00a0(observe que esse valor \u00e9 significativamente menor que o de 20 \u00b0 C)<\/li>\n<\/ul>\n<p>O\u00a0<strong>n\u00famero Rayleigh<\/strong>\u00a0resultante\u00a0\u00e9:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-flow-regime.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20654 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-flow-regime.png\" alt=\"exemplo - convec\u00e7\u00e3o natural - regime de fluxo\" width=\"498\" height=\"164\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-flow-regime.png\" \/><\/a><\/p>\n<p>O n\u00famero de Nusselt resultante, que representa o aprimoramento da transfer\u00eancia de calor atrav\u00e9s de uma camada de fluido como resultado da\u00a0<strong>convec\u00e7\u00e3o relativa \u00e0 condu\u00e7\u00e3o<\/strong>\u00a0atrav\u00e9s da mesma camada de fluido \u00e9:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-solution.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20655 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-solution.png\" alt=\"exemplo - convec\u00e7\u00e3o natural - solu\u00e7\u00e3o\" width=\"464\" height=\"46\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-solution.png\" \/><\/a><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-accordion\">\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-arrow\" data-anchor=\"References\">\n<div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><\/div>\n<\/div>\n<\/div>\n<div tabindex=\"0\" role=\"button\">\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Convec\u00e7\u00e3o Natural &#8211; Exemplo &#8211; Problema com Solu\u00e7\u00e3o.\u00a0Determine o n\u00famero de Nusselt para convec\u00e7\u00e3o natural usando a correla\u00e7\u00e3o simples para uma placa plana vertical.\u00a0Engenharia T\u00e9rmica Exemplo: Convec\u00e7\u00e3o Natural &#8211; Placa Plana Uma placa vertical de 10 cm de altura \u00e9 mantida a 261 \u00b0 C em \u00e1gua comprimida a 260 \u00b0 C (16MPa).\u00a0Determine o\u00a0n\u00famero de &#8230; <a title=\"O que \u00e9 Convec\u00e7\u00e3o Natural &#8211; Exemplo &#8211; Problema com Solu\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conveccao-natural-exemplo-problema-com-solucao-definicao\/\" aria-label=\"More on O que \u00e9 Convec\u00e7\u00e3o Natural &#8211; Exemplo &#8211; Problema com Solu\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O que \u00e9 Convec\u00e7\u00e3o Natural - Exemplo - Problema com Solu\u00e7\u00e3o - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Convec\u00e7\u00e3o Natural - Exemplo - Problema com Solu\u00e7\u00e3o. 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