{"id":47635,"date":"2019-11-05T18:35:41","date_gmt":"2019-11-05T17:35:41","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-conducao-de-calor-em-uma-grande-parede-plana-definicao\/"},"modified":"2020-01-24T12:31:13","modified_gmt":"2020-01-24T11:31:13","slug":"o-que-e-conducao-de-calor-em-uma-grande-parede-plana-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-de-calor-em-uma-grande-parede-plana-definicao\/","title":{"rendered":"O que \u00e9 condu\u00e7\u00e3o de calor em uma grande parede plana &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Condu\u00e7\u00e3o de calor em uma grande parede plana.\u00a0Considere a parede plana de espessura 2L, na qual h\u00e1 gera\u00e7\u00e3o uniforme e constante de calor por unidade de volume, qV [W \/ m3].\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>Condu\u00e7\u00e3o de calor em uma grande parede plana<\/h2>\n<p><strong><b>Condu\u00e7\u00e3o de calor em uma grande parede plana<\/b><\/strong><\/p>\n<p>Considere a parede plana de espessura 2L, na qual h\u00e1\u00a0<strong>gera\u00e7\u00e3o uniforme e constante de calor<\/strong>\u00a0por unidade de volume,\u00a0<strong>q\u00a0<sub>V<\/sub>\u00a0[W \/ m\u00a0<sup>3<\/sup>\u00a0]<\/strong>\u00a0.\u00a0O plano central \u00e9 tomado como a origem de x e a laje se estende a + L \u00e0 direita e &#8211; L \u00e0 esquerda.\u00a0Para\u00a0<a title=\"Condutividade t\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-condutividade-termica-definicao\/\">condutividade t\u00e9rmica<\/a>\u00a0constante\u00a0k, a forma apropriada da equa\u00e7\u00e3o do calor \u00e9:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-equation-heat-generation-equation.png\"><img loading=\"lazy\" class=\"size-medium wp-image-20229 aligncenter lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-equation-heat-generation-equation-300x96.png\" alt=\"equa\u00e7\u00e3o do calor - gera\u00e7\u00e3o de calor - equa\u00e7\u00e3o\" width=\"300\" height=\"96\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-equation-heat-generation-equation-300x96.png\" \/><\/a><\/p>\n<p>A solu\u00e7\u00e3o geral desta equa\u00e7\u00e3o \u00e9:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-general-solution.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20230 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-general-solution.png\" alt=\"equa\u00e7\u00e3o de condu\u00e7\u00e3o de calor - solu\u00e7\u00e3o geral\" width=\"290\" height=\"150\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-general-solution.png\" \/><\/a><\/p>\n<p>onde C\u00a0<sub>1<\/sub>\u00a0e C\u00a0<sub>2<\/sub>\u00a0s\u00e3o as constantes de integra\u00e7\u00e3o.<\/p>\n<p><span>1)<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Heat-Conduction-in-a-Large-Plane-Wall-figure.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-20228 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Heat-Conduction-in-a-Large-Plane-Wall-figure-300x276.png\" alt=\"Condu\u00e7\u00e3o de calor em uma grande parede plana\" width=\"300\" height=\"276\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Heat-Conduction-in-a-Large-Plane-Wall-figure-300x276.png\" \/><\/a><span>Calcule a distribui\u00e7\u00e3o de temperatura, T (x), atrav\u00e9s dessa parede plana e espessa, se:<\/span><\/p>\n<ul>\n<li><span>as temperaturas em ambas as superf\u00edcies s\u00e3o 15,0 \u00b0 C<\/span><\/li>\n<li><span>a espessura desta parede \u00e9 2L = 10 mm.<\/span><\/li>\n<li><span>a condutividade dos materiais \u00e9 k = 2,8 W \/ mK (corresponde ao di\u00f3xido de ur\u00e2nio a 1000 \u00b0 C)<\/span><\/li>\n<li><span>a taxa de calor volum\u00e9trico \u00e9 q\u00a0<\/span><sub><span>V<\/span><\/sub><span>\u00a0= 10\u00a0<\/span><sup><span>6<\/span><\/sup><span>\u00a0W \/ m\u00a0<\/span><sup><span>3<\/span><\/sup><\/li>\n<\/ul>\n<p><span>Nesse caso, as superf\u00edcies s\u00e3o mantidas em determinadas temperaturas T\u00a0<\/span><sub><span>s, 1<\/span><\/sub><span>\u00a0e T\u00a0<\/span><sub><span>s, 2<\/span><\/sub><span>\u00a0.\u00a0Isso corresponde \u00e0\u00a0<\/span><a title=\"Condi\u00e7\u00e3o de limite do Dirichlet - Condi\u00e7\u00e3o de limite do tipo I\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/thermal-conduction\/heat-conduction-equation\/dirichlet-boundary-condition-type-i-boundary-condition\/\"><span>condi\u00e7\u00e3o de limite de Dirichlet<\/span><\/a><span>\u00a0.\u00a0Al\u00e9m disso, esse problema \u00e9 termicamente sim\u00e9trico e, portanto, tamb\u00e9m podemos usar\u00a0<\/span><a title=\"Limite Adiab\u00e1tico - Simetria T\u00e9rmica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/thermal-conduction\/heat-conduction-equation\/adiabatic-boundary-thermal-symmetry\/\"><span>a condi\u00e7\u00e3o de contorno de simetria t\u00e9rmica<\/span><\/a><span>\u00a0.\u00a0As constantes podem ser avaliadas usando a substitui\u00e7\u00e3o na solu\u00e7\u00e3o geral e t\u00eam a forma:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-boundary-conditions.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20231 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-boundary-conditions.png\" alt=\"equa\u00e7\u00e3o de condu\u00e7\u00e3o de calor - condi\u00e7\u00f5es de contorno\" width=\"428\" height=\"110\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-boundary-conditions.png\" \/><\/a><\/p>\n<p><span>A distribui\u00e7\u00e3o de temperatura resultante e a temperatura da linha central (x = 0) (m\u00e1xima) nesta parede plana nessas condi\u00e7\u00f5es de contorno espec\u00edficas ser\u00e3o:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-solution.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20232 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-solution.png\" alt=\"equa\u00e7\u00e3o de condu\u00e7\u00e3o de calor - solu\u00e7\u00e3o\" width=\"608\" height=\"210\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-conduction-equation-solution.png\" \/><\/a><\/p>\n<p><span>O\u00a0<\/span><a title=\"Densidade do fluxo de calor - Fluxo t\u00e9rmico\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/introduction-to-heat-transfer\/heat-flux-density-thermal-flux\/\"><span>fluxo de calor<\/span><\/a><span>\u00a0em qualquer ponto, q\u00a0<\/span><sub><span>x<\/span><\/sub><span>\u00a0[Wm\u00a0<\/span><sup><span>-2<\/span><\/sup><span>\u00a0], na parede pode, \u00e9 claro, ser determinado usando a distribui\u00e7\u00e3o de temperatura e com a\u00a0<\/span><a title=\"Lei de Fourier de condu\u00e7\u00e3o t\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-lei-de-conducao-termica-de-fourier-definicao\/\"><strong><span>lei de Fourier<\/span><\/strong><\/a><span>\u00a0.\u00a0Observe que, com a gera\u00e7\u00e3o de calor, o fluxo de calor n\u00e3o \u00e9 mais independente de x, portanto:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-condution-through-wall.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20233 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-condution-through-wall.png\" alt=\"condu\u00e7\u00e3o de calor atrav\u00e9s da parede\" width=\"315\" height=\"178\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/heat-condution-through-wall.png\" \/><\/a><\/p>\n<p><strong><span>Exemplo de equa\u00e7\u00e3o de calor &#8211; Problema com solu\u00e7\u00e3o<\/span><\/strong><\/p>\n<\/div>\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","protected":false},"excerpt":{"rendered":"<p>Condu\u00e7\u00e3o de calor em uma grande parede plana.\u00a0Considere a parede plana de espessura 2L, na qual h\u00e1 gera\u00e7\u00e3o uniforme e constante de calor por unidade de volume, qV [W \/ m3].\u00a0Engenharia T\u00e9rmica Condu\u00e7\u00e3o de calor em uma grande parede plana Condu\u00e7\u00e3o de calor em uma grande parede plana Considere a parede plana de espessura 2L, &#8230; <a title=\"O que \u00e9 condu\u00e7\u00e3o de calor em uma grande parede plana &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-de-calor-em-uma-grande-parede-plana-definicao\/\" aria-label=\"More on O que \u00e9 condu\u00e7\u00e3o de calor em uma grande parede plana &#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 condu\u00e7\u00e3o de calor em uma grande parede plana - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Condu\u00e7\u00e3o de calor em uma grande parede plana. 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