{"id":51915,"date":"2020-02-01T17:48:09","date_gmt":"2020-02-01T16:48:09","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-a-formula-de-numero-de-reynolds-definicao\/"},"modified":"2020-02-01T17:50:56","modified_gmt":"2020-02-01T16:50:56","slug":"o-que-e-a-formula-de-numero-de-reynolds-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-formula-de-numero-de-reynolds-definicao\/","title":{"rendered":"O que \u00e9 a f\u00f3rmula de n\u00famero de Reynolds &#8211; defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">F\u00f3rmula de n\u00famero de Reynolds. O n\u00famero de Reynolds \u00e9 a raz\u00e3o entre for\u00e7as inerciais e for\u00e7as viscosas e \u00e9 um par\u00e2metro para prever se um fluxo ser\u00e1 laminar ou turbulento. Engenharia T\u00e9rmica<\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<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<h2><span>Reynolds Number Formula<\/span><\/h2>\n<p><strong><span>O n\u00famero de Reynolds<\/span><\/strong><span>\u00a0\u00e9 a propor\u00e7\u00e3o de\u00a0<\/span><strong><span>for\u00e7as de in\u00e9rcia<\/span><\/strong><span>\u00a0para\u00a0<\/span><strong><span>as for\u00e7as viscosas<\/span><\/strong><span>\u00a0e \u00e9 um par\u00e2metro conveniente para prever se uma condi\u00e7\u00e3o de escoamento vai ser\u00a0<\/span><strong><span>laminar ou turbulento<\/span><\/strong><span>\u00a0.\u00a0Pode-se interpretar que quando as\u00a0<\/span><strong><span>for\u00e7as viscosas<\/span><\/strong><span>\u00a0s\u00e3o dominantes (fluxo lento, Re baixo) s\u00e3o suficientes o suficiente para manter todas as part\u00edculas de fluido alinhadas, ent\u00e3o o fluxo \u00e9 laminar.\u00a0Mesmo Re muito baixo indica movimento de rastejamento viscoso, onde os efeitos de in\u00e9rcia s\u00e3o desprez\u00edveis.\u00a0Quando as\u00a0<\/span><strong><span>for\u00e7as inerciais dominam<\/span><\/strong><span>\u00a0sobre as for\u00e7as viscosas (quando o fluido est\u00e1 fluindo mais r\u00e1pido e Re \u00e9 maior), ent\u00e3o o fluxo \u00e9 turbulento.<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-Number.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-14465 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-Number.png\" alt=\"N\u00famero de Reynolds\" width=\"563\" height=\"284\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-Number.png\" \/><\/a><\/p>\n<p><strong><span>\u00c9 um n\u00famero sem dimens\u00e3o<\/span><\/strong><span>\u00a0composto pelas caracter\u00edsticas f\u00edsicas do fluxo.\u00a0Um n\u00famero crescente de Reynolds indica uma crescente turbul\u00eancia do fluxo.<\/span><\/p>\n<p><span>A\u00a0<\/span><strong><span>f\u00f3rmula do n\u00famero de Reynolds<\/span><\/strong><span>\u00a0\u00e9:<\/span><br \/>\n<a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-number-formula.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-14445 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-number-formula.png\" alt=\"N\u00famero de Reynolds\" width=\"229\" height=\"82\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-number-formula.png\" \/><\/a><\/p>\n<p><span>em que:<\/span><br \/>\n<span>V \u00e9 a velocidade do fluxo,<\/span><br \/>\n<span>D \u00e9 uma\u00a0<\/span><strong><span>dimens\u00e3o linear caracter\u00edstica<\/span><\/strong><span>\u00a0(comprimento percorrido do fluido;\u00a0<\/span><a title=\"Di\u00e2metro hidr\u00e1ulico\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/internal-flow\/hydraulic-diameter-2\/\"><span>di\u00e2metro hidr\u00e1ulico<\/span><\/a><span>\u00a0etc.)<\/span><br \/>\n<span>\u03c1 densidade do fluido (kg \/ m\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0),<\/span><br \/>\n<span>\u03bc viscosidade din\u00e2mica (Pa.s),<\/span><br \/>\n<span>\u03bd viscosidade cinem\u00e1tica ( m\u00a0<\/span><sup><span>2<\/span><\/sup><span>\u00a0\/ s);\u00a0\u03bd = \u03bc \/ \u03c1.<\/span><\/p>\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\"><\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\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<h2><span>Fluxo Laminar vs. Turbulento<\/span><\/h2>\n<p><strong><span>Fluxo laminar:<\/span><\/strong><\/p>\n<ul>\n<li><strong><span>Re &lt;2000<\/span><\/strong><\/li>\n<li><span>velocidade &#8216;baixa&#8217;<\/span><\/li>\n<li><span>Part\u00edculas fluidas se movem em\u00a0<\/span><strong><span>linhas retas<\/span><\/strong><\/li>\n<li><span>Camadas de \u00e1gua fluem umas sobre as outras em velocidades diferentes,\u00a0<\/span><strong><span>praticamente sem mistura<\/span><\/strong><span>\u00a0entre as camadas.<\/span><\/li>\n<li><span>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.<\/span><\/li>\n<li><span>A velocidade m\u00e9dia do fluxo \u00e9 aproximadamente metade da velocidade m\u00e1xima.<\/span><\/li>\n<li><span>\u00c9 poss\u00edvel uma an\u00e1lise matem\u00e1tica simples.<\/span><\/li>\n<li><strong><span>Raro na pr\u00e1tica em sistemas de \u00e1gua<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<\/ul>\n<p><strong><span>Fluxo turbulento:<\/span><\/strong><\/p>\n<ul>\n<li><strong><span>Re&gt; 4000<\/span><\/strong><\/li>\n<li><span>&#8216;alta velocidade<\/span><\/li>\n<li><span>O fluxo \u00e9 caracterizado pelo\u00a0<\/span><strong><span>movimento irregular<\/span><\/strong><span>\u00a0de part\u00edculas do fluido.<\/span><\/li>\n<li><span>O movimento m\u00e9dio est\u00e1 na dire\u00e7\u00e3o do fluxo<\/span><\/li>\n<li><span>O perfil de velocidade do fluxo para turbul\u00eancia \u00e9 bastante plano atrav\u00e9s da se\u00e7\u00e3o central de um tubo e cai rapidamente extremamente perto das paredes.<\/span><\/li>\n<li><span>A velocidade m\u00e9dia do fluxo \u00e9 aproximadamente igual \u00e0 velocidade no centro do tubo.<\/span><\/li>\n<li><span>A an\u00e1lise matem\u00e1tica \u00e9 muito dif\u00edcil.<\/span><\/li>\n<li><strong><span>Tipo mais comum de fluxo<\/span><\/strong><span> .<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div><\/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>F\u00f3rmula de n\u00famero de Reynolds. O n\u00famero de Reynolds \u00e9 a raz\u00e3o entre for\u00e7as inerciais e for\u00e7as viscosas e \u00e9 um par\u00e2metro para prever se um fluxo ser\u00e1 laminar ou turbulento. Engenharia T\u00e9rmica Reynolds Number Formula O n\u00famero de Reynolds\u00a0\u00e9 a propor\u00e7\u00e3o de\u00a0for\u00e7as de in\u00e9rcia\u00a0para\u00a0as for\u00e7as viscosas\u00a0e \u00e9 um par\u00e2metro conveniente para prever se uma &#8230; <a title=\"O que \u00e9 a f\u00f3rmula de n\u00famero de Reynolds &#8211; defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-formula-de-numero-de-reynolds-definicao\/\" aria-label=\"More on O que \u00e9 a f\u00f3rmula de n\u00famero de Reynolds &#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 a f\u00f3rmula de n\u00famero de Reynolds - defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"F\u00f3rmula de n\u00famero de Reynolds. 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