{"id":47272,"date":"2019-11-03T20:37:01","date_gmt":"2019-11-03T19:37:01","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-conducao-conveccao-radiacao-definicao\/"},"modified":"2020-01-23T08:37:59","modified_gmt":"2020-01-23T07:37:59","slug":"o-que-e-conducao-conveccao-radiacao-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-conveccao-radiacao-definicao\/","title":{"rendered":"O que \u00e9 Condu\u00e7\u00e3o &#8211; Convec\u00e7\u00e3o &#8211; Radia\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">A transfer\u00eancia de calor \u00e9 geralmente classificada em v\u00e1rios mecanismos, como: Condu\u00e7\u00e3o &#8211; Convec\u00e7\u00e3o &#8211; Radia\u00e7\u00e3o.\u00a0Na engenharia de energia, ele determina os principais par\u00e2metros e materiais dos trocadores de calor.\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 &#8211; Convec\u00e7\u00e3o &#8211; Radia\u00e7\u00e3o<\/h2>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Heat-Transfer-mechanisms-min.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-20376 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Heat-Transfer-mechanisms-min-300x295.png\" alt=\"Transfer\u00eancia de calor - mecanismos\" width=\"300\" height=\"295\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Heat-Transfer-mechanisms-min-300x295.png\" \/><\/a>A transfer\u00eancia de calor \u00e9 uma disciplina de engenharia que diz respeito \u00e0 gera\u00e7\u00e3o, uso, convers\u00e3o e troca de calor (energia t\u00e9rmica) entre sistemas f\u00edsicos.\u00a0Na engenharia de energia, ele determina os principais par\u00e2metros e materiais dos trocadores de calor.\u00a0A transfer\u00eancia de calor \u00e9 geralmente classificada em v\u00e1rios mecanismos, como:<\/p>\n<ul>\n<li><strong><a title=\"Condu\u00e7\u00e3o T\u00e9rmica - Condu\u00e7\u00e3o T\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-termica-conducao-termica-definicao\/\">Condu\u00e7\u00e3o de calor<\/a>\u00a0.\u00a0<\/strong>\u00a0A condu\u00e7\u00e3o de calor, tamb\u00e9m chamada difus\u00e3o, ocorre dentro de um corpo ou entre dois corpos em contato.\u00a0\u00c9 a troca microsc\u00f3pica direta de energia cin\u00e9tica de part\u00edculas atrav\u00e9s da fronteira entre dois sistemas.\u00a0Quando um objeto est\u00e1 a uma temperatura diferente de outro corpo ou de seus arredores<\/li>\n<li><strong><a title=\"Convec\u00e7\u00e3o - Transfer\u00eancia de calor por convec\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conveccao-transferencia-de-calor-por-conveccao-definicao\/\">Convec\u00e7\u00e3o por Calor<\/a>\u00a0.\u00a0<\/strong>\u00a0A convec\u00e7\u00e3o de calor depende do movimento de massa de uma regi\u00e3o do espa\u00e7o para outra.\u00a0A convec\u00e7\u00e3o de calor ocorre quando o fluxo a granel de um fluido (g\u00e1s ou l\u00edquido) transporta calor junto com o fluxo de mat\u00e9ria no fluido.<\/li>\n<li><strong><a title=\"Transfer\u00eancia de calor por radia\u00e7\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/radiation-heat-transfer\/\">Radia\u00e7\u00e3o t\u00e9rmica<\/a>\u00a0.\u00a0<\/strong>\u00a0A radia\u00e7\u00e3o \u00e9 a transfer\u00eancia de calor por radia\u00e7\u00e3o eletromagn\u00e9tica, como a luz do sol, sem a necessidade de que a mat\u00e9ria esteja presente no espa\u00e7o entre os corpos.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights  lgc-first\">\n<div class=\"inside-grid-column\">\n<h2><span>Condu\u00e7\u00e3o<\/span><\/h2>\n<p><a title=\"Condu\u00e7\u00e3o T\u00e9rmica - Condu\u00e7\u00e3o T\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-termica-conducao-termica-definicao\/\"><strong><span>A condu\u00e7\u00e3o t\u00e9rmica<\/span><\/strong><\/a><span>\u00a0, tamb\u00e9m chamada de\u00a0<\/span><strong><span>\u00a0condu\u00e7\u00e3o t\u00e9rmica<\/span><\/strong><span>\u00a0, ocorre dentro de um corpo ou entre dois\u00a0<\/span><strong><span>\u00a0corpos em contato<\/span><\/strong><span>\u00a0sem o envolvimento do fluxo de massa e da mistura.\u00a0\u00c9 a troca microsc\u00f3pica direta da\u00a0<\/span><a title=\"O que \u00e9 energia cin\u00e9tica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-kinetic-energy\/\"><span>\u00a0energia cin\u00e9tica<\/span><\/a><span>\u00a0\u00a0das part\u00edculas atrav\u00e9s da fronteira entre dois sistemas.\u00a0<\/span><a title=\"Transfer\u00eancia de calor\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-transferencia-de-calor-definicao\/\"><span>A transfer\u00eancia de calor<\/span><\/a><span>\u00a0\u00a0por\u00a0<\/span><strong><span>\u00a0condu\u00e7\u00e3o<\/span><\/strong><span>\u00a0depende da \u201cfor\u00e7a\u201d motriz da<\/span><strong><span>\u00a0\u00a0diferen\u00e7a<\/span><\/strong><span>\u00a0de<strong>\u00a0temperatura<\/strong>\u00a0\u00a0e da\u00a0<\/span><strong><span>\u00a0condutividade t\u00e9rmica<\/span><\/strong><span>\u00a0\u00a0(ou da resist\u00eancia \u00e0 transfer\u00eancia de calor).\u00a0A condutividade t\u00e9rmica depende da natureza e das dimens\u00f5es do meio de transfer\u00eancia de calor.\u00a0Todos os problemas de transfer\u00eancia de calor envolvem a\u00a0<\/span><strong><span>\u00a0diferen\u00e7a de temperatura<\/span><\/strong><span>\u00a0, a\u00a0<\/span><strong><span>\u00a0geometria<\/span><\/strong><span>e as\u00a0\u00a0<\/span><strong><span>propriedades f\u00edsicas<\/span><\/strong><span>\u00a0do objeto que est\u00e1 sendo estudado.\u00a0Em problemas de transfer\u00eancia de calor por condu\u00e7\u00e3o, o objeto em estudo geralmente \u00e9 s\u00f3lido.<\/span><\/p>\n<p><span>Microscopicamente, esse modo de transfer\u00eancia de energia \u00e9 atribu\u00eddo ao\u00a0\u00a0<\/span><strong><span>fluxo livre de el\u00e9trons<\/span><\/strong><span>\u00a0\u00a0dos n\u00edveis de energia mais alto para o mais baixo,\u00a0<\/span><strong><span>\u00a0vibra\u00e7\u00e3o da rede<\/span><\/strong><span>\u00a0\u00a0e\u00a0\u00a0<\/span><strong><span>colis\u00e3o molecular<\/span><\/strong><span>\u00a0.\u00a0Considere um\u00a0\u00a0<\/span><strong><span>bloco de pedra<\/span><\/strong><span>\u00a0\u00a0em alta temperatura, que consiste em \u00e1tomos que oscilam intensamente em torno de suas posi\u00e7\u00f5es m\u00e9dias.\u00a0<\/span><strong><span>A baixas temperaturas<\/span><\/strong><span>\u00a0, os \u00e1tomos continuam a oscilar, mas com\u00a0\u00a0<\/span><strong><span>menos intensidade<\/span><\/strong><span>\u00a0.\u00a0Se um bloco de pedra mais quente \u00e9 colocado em contato com um bloco mais frio, os \u00e1tomos intensamente oscilantes na borda do bloco mais quente emitem sua energia cin\u00e9tica para os \u00e1tomos menos oscilantes na borda do bloco frio.\u00a0Nesse caso, h\u00e1\u00a0\u00a0<\/span><strong><span>transfer\u00eancia de energia<\/span><\/strong><span>\u00a0\u00a0entre esses dois blocos e\u00a0<\/span><strong><a title=\"Calor em F\u00edsica - Defini\u00e7\u00e3o de Calor\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-calor-na-fisica-calor-definicao\/\"><span>o calor<\/span><\/a><span>\u00a0\u00a0flui<\/span><\/strong><span>\u00a0\u00a0do bloco mais quente para o mais frio por essas vibra\u00e7\u00f5es aleat\u00f3rias.\u00a0A vis\u00e3o moderna \u00e9 atribuir a transfer\u00eancia de energia a ondas reticuladas induzidas pelo movimento at\u00f4mico.\u00a0Nos isoladores el\u00e9tricos, a transfer\u00eancia de energia \u00e9 exclusivamente atrav\u00e9s dessas ondas de treli\u00e7a.\u00a0Em um condutor, isso tamb\u00e9m se deve ao movimento de transla\u00e7\u00e3o dos el\u00e9trons livres.<\/span><\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Convec\u00e7\u00e3o<\/span><\/h2>\n<p><span>Em geral, a\u00a0\u00a0<\/span><a title=\"Convec\u00e7\u00e3o - Transfer\u00eancia de calor por convec\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conveccao-transferencia-de-calor-por-conveccao-definicao\/\"><strong><span>convec\u00e7\u00e3o<\/span><\/strong><\/a><span>\u00a0\u00a0\u00e9 a\u00a0\u00a0<\/span><strong><span>transfer\u00eancia de massa<\/span><\/strong><span>\u00a0\u00a0ou a\u00a0\u00a0<\/span><strong><span>transfer\u00eancia de calor<\/span><\/strong><span>\u00a0\u00a0devido ao\u00a0\u00a0<\/span><strong><span>movimento em massa<\/span><\/strong><span>\u00a0\u00a0de mol\u00e9culas dentro de fluidos, como gases e l\u00edquidos.\u00a0Embora l\u00edquidos e gases geralmente n\u00e3o sejam bons condutores de calor, eles podem transferir calor rapidamente\u00a0\u00a0<\/span><strong><span>por convec\u00e7\u00e3o<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><strong><span>A convec\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00a0ocorre atrav\u00e9s de\u00a0\u00a0<\/span><strong><span>advec\u00e7\u00e3o<\/span><\/strong><span>\u00a0,\u00a0\u00a0<\/span><strong><span>difus\u00e3o<\/span><\/strong><span>\u00a0\u00a0ou ambos.\u00a0A convec\u00e7\u00e3o n\u00e3o pode ocorrer na maioria dos s\u00f3lidos, porque nem a difus\u00e3o significativa da mat\u00e9ria nem os fluxos de corrente a granel podem ocorrer.\u00a0A difus\u00e3o do calor ocorre em s\u00f3lidos r\u00edgidos, mas isso \u00e9 chamado\u00a0\u00a0<\/span><a title=\"Condu\u00e7\u00e3o T\u00e9rmica - Condu\u00e7\u00e3o T\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-termica-conducao-termica-definicao\/\"><span>de condu\u00e7\u00e3o t\u00e9rmica<\/span><\/a><span>\u00a0.<\/span><\/p>\n<p><span>O processo de transfer\u00eancia de calor entre uma superf\u00edcie e um fluido que flui em contato com ela \u00e9 chamado de\u00a0\u00a0<\/span><strong><span>transfer\u00eancia de calor por convec\u00e7\u00e3o<\/span><\/strong><span>\u00a0.\u00a0Na engenharia, a transfer\u00eancia de calor por convec\u00e7\u00e3o \u00e9 um dos principais mecanismos de\u00a0<\/span><a title=\"Transfer\u00eancia de calor\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-transferencia-de-calor-definicao\/\"><strong><span>transfer\u00eancia<\/span><\/strong><\/a><span>\u00a0de\u00a0\u00a0<a title=\"Transfer\u00eancia de calor\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-transferencia-de-calor-definicao\/\"><strong>calor<\/strong><\/a>\u00a0.\u00a0Quando o calor \u00e9 transferido de um fluido para outro atrav\u00e9s de uma barreira, a convec\u00e7\u00e3o \u00e9 envolvida em ambos os lados da barreira.\u00a0Na maioria dos casos, a principal\u00a0\u00a0<\/span><a title=\"Resist\u00eancia t\u00e9rmica - analogia \u00e0 resist\u00eancia el\u00e9trica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/thermal-conduction\/thermal-resistance-thermal-resistivity\/thermal-resistance-analogy-to-electric-resistance\/\"><span>resist\u00eancia<\/span><\/a><span>\u00a0\u00a0ao fluxo de calor \u00e9 por convec\u00e7\u00e3o.\u00a0<\/span><strong><span>A transfer\u00eancia de calor por convec\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00a0ocorre tanto por difus\u00e3o t\u00e9rmica (o movimento aleat\u00f3rio das mol\u00e9culas de fluido) quanto por advec\u00e7\u00e3o, na qual a mat\u00e9ria ou o calor \u00e9 transportado pelo movimento em larga escala das correntes no fluido.<\/span><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights  lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Transfer\u00eancia de calor por radia\u00e7\u00e3o<\/span><\/h2>\n<p><span>Nos cap\u00edtulos anteriores, discutimos\u00a0<\/span><a title=\"Convec\u00e7\u00e3o - Transfer\u00eancia de calor por convec\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conveccao-transferencia-de-calor-por-conveccao-definicao\/\"><span>convec\u00e7\u00e3o<\/span><\/a><span>\u00a0e\u00a0<\/span><a title=\"Condu\u00e7\u00e3o T\u00e9rmica - Condu\u00e7\u00e3o T\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-termica-conducao-termica-definicao\/\"><span>condu\u00e7\u00e3o<\/span><\/a><span>\u00a0, que exigem a presen\u00e7a de mat\u00e9ria como meio para transportar o calor da regi\u00e3o mais quente para a mais fria.\u00a0Mas um terceiro tipo de transfer\u00eancia de calor,\u00a0<\/span><a title=\"Transfer\u00eancia de calor por radia\u00e7\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/radiation-heat-transfer\/\"><strong><span>a transfer\u00eancia de calor por radia\u00e7\u00e3o<\/span><\/strong><\/a><span>\u00a0, ocorre sem nenhum meio.\u00a0Em geral, a\u00a0<\/span><strong><span>transfer\u00eancia de calor por radia\u00e7\u00e3o<\/span><\/strong><span>\u00a0de uma superf\u00edcie para outra \u00e9 a radia\u00e7\u00e3o que sai da primeira superf\u00edcie para a outra menos a que chega da segunda superf\u00edcie.\u00a0<\/span><strong><span>A transfer\u00eancia de calor<\/span><\/strong><span>\u00a0por\u00a0<\/span><strong><span>radia\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00e9 mediada pela\u00a0<strong>radia\u00e7\u00e3o eletromagn\u00e9tica<\/strong>\u00a0, conhecida como\u00a0<\/span><strong><span>radia\u00e7\u00e3o t\u00e9rmica<\/span><\/strong><span>\u00a0, que surge devido \u00e0\u00a0<\/span><a title=\"O que \u00e9 temperatura - F\u00edsica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-temperatura-fisica-definicao\/\"><span>temperatura<\/span><\/a><span>\u00a0de um corpo.\u00a0Qualquer material que tenha uma temperatura acima<\/span><a title=\"Zero Absoluto - Temperatura\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-temperature-physics\/absolute-zero-temperature\/\"><span>zero absoluto<\/span><\/a><span>\u00a0emite alguma\u00a0<\/span><a title=\"Energia radiante\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/radiant-energy\/\"><strong><span>energia radiante<\/span><\/strong><\/a><span>\u00a0.\u00a0A maior\u00a0parte dessa\u00a0<\/span><a title=\"O que \u00e9 energia - F\u00edsica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/\"><span>energia<\/span><\/a><span>\u00a0est\u00e1 na regi\u00e3o\u00a0<\/span><strong><span>infravermelha<\/span><\/strong><span>\u00a0do espectro eletromagn\u00e9tico, embora parte dela esteja na regi\u00e3o vis\u00edvel.\u00a0Um dos exemplos mais importantes de transfer\u00eancia de calor por radia\u00e7\u00e3o \u00e9 a absor\u00e7\u00e3o de radia\u00e7\u00e3o solar da Terra, seguida por sua radia\u00e7\u00e3o t\u00e9rmica de sa\u00edda.\u00a0Esses processos determinam a temperatura e o clima da Terra.<\/span><\/p>\n<figure id=\"attachment_240\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-240\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Sun.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-240 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Sun-300x298.jpg\" alt=\"O sol\" width=\"300\" height=\"298\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Sun-300x298.jpg\" \/><\/a><figcaption id=\"caption-attachment-240\" class=\"wp-caption-text\"><span>O Sol gera sua energia por fus\u00e3o nuclear de n\u00facleos de hidrog\u00eanio em h\u00e9lio.\u00a0Em sua ess\u00eancia, o Sol funde 620 milh\u00f5es de toneladas m\u00e9tricas de hidrog\u00eanio a cada segundo.<\/span><br \/>\n<span>Fonte: hyperphysics.phy-astr.gsu.edu<\/span><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<div class=\"su-spacer\"><\/div>\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>A transfer\u00eancia de calor \u00e9 geralmente classificada em v\u00e1rios mecanismos, como: Condu\u00e7\u00e3o &#8211; Convec\u00e7\u00e3o &#8211; Radia\u00e7\u00e3o.\u00a0Na engenharia de energia, ele determina os principais par\u00e2metros e materiais dos trocadores de calor.\u00a0Engenharia T\u00e9rmica Condu\u00e7\u00e3o &#8211; Convec\u00e7\u00e3o &#8211; Radia\u00e7\u00e3o A transfer\u00eancia de calor \u00e9 uma disciplina de engenharia que diz respeito \u00e0 gera\u00e7\u00e3o, uso, convers\u00e3o e troca de &#8230; <a title=\"O que \u00e9 Condu\u00e7\u00e3o &#8211; Convec\u00e7\u00e3o &#8211; Radia\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conducao-conveccao-radiacao-definicao\/\" aria-label=\"More on O que \u00e9 Condu\u00e7\u00e3o &#8211; Convec\u00e7\u00e3o &#8211; Radia\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 Condu\u00e7\u00e3o - Convec\u00e7\u00e3o - Radia\u00e7\u00e3o - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A transfer\u00eancia de calor \u00e9 geralmente classificada em v\u00e1rios mecanismos, como: Condu\u00e7\u00e3o - Convec\u00e7\u00e3o - Radia\u00e7\u00e3o. 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