{"id":49029,"date":"2019-11-14T05:26:12","date_gmt":"2019-11-14T04:26:12","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-fator-de-atrito-para-fluxo-laminar-definicao\/"},"modified":"2020-02-01T16:13:32","modified_gmt":"2020-02-01T15:13:32","slug":"o-que-e-fator-de-atrito-para-fluxo-laminar-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fator-de-atrito-para-fluxo-laminar-definicao\/","title":{"rendered":"O que \u00e9 fator de atrito para fluxo laminar &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">O fator de atrito de Darcy para fluxos laminares (lentos) \u00e9 uma consequ\u00eancia da lei de Poiseuille que \u00e9 dada pelas seguintes equa\u00e7\u00f5es: f = 64 \/ Re<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-60 lgc-tablet-grid-60 lgc-mobile-grid-100 lgc-equal-heights lgc-first\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Fator de atrito de Darcy para fluxo laminar<\/h2>\n<p>Para fins pr\u00e1ticos, se o\u00a0<a title=\"N\u00famero de Reynolds\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/reynolds-number\/\"><strong>n\u00famero de Reynolds<\/strong><\/a>\u00a0for menor que 2000, o fluxo ser\u00e1\u00a0<a title=\"Fluxo Laminar - Fluxo Viscoso\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fluxo-laminar-fluxo-viscoso-definicao\/\">laminar<\/a>\u00a0.\u00a0O n\u00famero de Reynolds de transi\u00e7\u00e3o aceito para o fluxo em um tubo circular \u00e9 Re\u00a0<sub>d, crit<\/sub>\u00a0= 2300. Para o fluxo laminar, a\u00a0<strong>perda de\u00a0<\/strong><strong>carga\u00a0<\/strong><strong>\u00e9 proporcional \u00e0 velocidade<\/strong>\u00a0e n\u00e3o\u00a0<strong>\u00e0 velocidade<\/strong>\u00a0ao quadrado, portanto, o\u00a0<strong>fator de atrito \u00e9 inversamente proporcional \u00e0 velocidade<\/strong>\u00a0.<\/p>\n<p><a title=\"Fator de atrito de Darcy\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-fator-de-atrito-de-darcy-definicao\/\"><strong>O fator de atrito de Darcy<\/strong><\/a>\u00a0para fluxos laminares (lentos) \u00e9 uma consequ\u00eancia da<strong>\u00a0lei<\/strong>\u00a0de<strong>\u00a0Poiseuille<\/strong>\u00a0que \u00e9 dada pelas seguintes equa\u00e7\u00f5es:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/darcy-friction-factor-for-laminar-flow.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-14584 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/darcy-friction-factor-for-laminar-flow.png\" alt=\"fator de atrito darcy para fluxo laminar\" width=\"601\" height=\"231\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/darcy-friction-factor-for-laminar-flow.png\" \/><\/a><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-40 lgc-tablet-grid-40 lgc-mobile-grid-100 lgc-equal-heights lgc-last\">\n<div class=\"inside-grid-column\">\n<p><strong>Fluxo laminar:<\/strong><\/p>\n<ul>\n<li><strong>Re &lt;2000<\/strong><\/li>\n<li>velocidade &#8216;baixa&#8217;<\/li>\n<li>Part\u00edculas fluidas se movem em\u00a0<strong>linhas retas<\/strong><\/li>\n<li>Camadas de \u00e1gua fluem umas sobre as outras em velocidades diferentes,\u00a0<strong>praticamente sem mistura<\/strong>\u00a0entre as camadas.<\/li>\n<li>O perfil da velocidade do fluxo para o fluxo laminar em tubos circulares \u00e9 parab\u00f3lico, com um fluxo m\u00e1ximo no centro do tubo e um fluxo m\u00ednimo nas paredes do tubo.<\/li>\n<li>A velocidade m\u00e9dia do fluxo \u00e9 aproximadamente metade da velocidade m\u00e1xima.<\/li>\n<li>\u00c9 poss\u00edvel uma an\u00e1lise matem\u00e1tica simples.<\/li>\n<li><strong>Raro na pr\u00e1tica em sistemas de \u00e1gua<\/strong>\u00a0.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Moody-chart-min.jpg\"><img loading=\"lazy\" class=\"size-full wp-image-14429 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Moody-chart-min.jpg\" alt=\"Moody Diagram\" width=\"1409\" height=\"884\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Moody-chart-min.jpg\" \/><\/a><span>Fonte: Donebythesecondlaw no idioma ingl\u00eas Wikipedia, CC BY-SA 3.0,<\/span><br \/>\n<span>https:\/\/commons.wikimedia.org\/w\/index.php?curid=4681366<\/span><\/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>O fator de atrito de Darcy para fluxos laminares (lentos) \u00e9 uma consequ\u00eancia da lei de Poiseuille que \u00e9 dada pelas seguintes equa\u00e7\u00f5es: f = 64 \/ Re Fator de atrito de Darcy para fluxo laminar Para fins pr\u00e1ticos, se o\u00a0n\u00famero de Reynolds\u00a0for menor que 2000, o fluxo ser\u00e1\u00a0laminar\u00a0.\u00a0O n\u00famero de Reynolds de transi\u00e7\u00e3o aceito &#8230; <a title=\"O que \u00e9 fator de atrito para fluxo laminar &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fator-de-atrito-para-fluxo-laminar-definicao\/\" aria-label=\"More on O que \u00e9 fator de atrito para fluxo laminar &#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 - 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