{"id":47471,"date":"2019-11-05T03:02:59","date_gmt":"2019-11-05T02:02:59","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-a-equacao-de-sieder-tate-definicao\/"},"modified":"2020-01-23T14:38:58","modified_gmt":"2020-01-23T13:38:58","slug":"o-que-e-a-equacao-de-sieder-tate-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/","title":{"rendered":"O que \u00e9 a Equa\u00e7\u00e3o de Sieder-Tate – Defini\u00e7\u00e3o"},"content":{"rendered":"
\n
Equa\u00e7\u00e3o de Sieder-Tate.\u00a0Quando a diferen\u00e7a entre a temperatura da superf\u00edcie e do fluido \u00e9 grande, pode ser necess\u00e1rio considerar a varia\u00e7\u00e3o da viscosidade com a temperatura.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n
<\/div>\n
\n
\n
<\/div>\n

Equa\u00e7\u00e3o de Sieder-Tate<\/h2>\n

A\u00a0\u00a0correla\u00e7\u00e3o de Dittus-Boelter<\/strong>\u00a0<\/a>\u00a0pode ser usada para diferen\u00e7as de temperatura pequenas a moderadas, T\u00a0wall<\/sub>\u00a0\u00a0– T\u00a0avg<\/sub>\u00a0, com todas as propriedades avaliadas em uma temperatura\u00a0m\u00e9dia<\/sub>\u00a0T\u00a0avg<\/sub>\u00a0.<\/p>\n

Para fluxos caracterizados por grandes varia\u00e7\u00f5es de propriedades, as corre\u00e7\u00f5es (por exemplo, um fator de corre\u00e7\u00e3o de viscosidade\u00a0\u00a0\u03bc \/ \u03bc\u00a0<\/strong>parede<\/sub><\/strong>\u00a0) devem ser levadas em considera\u00e7\u00e3o, por exemplo, como recomendam Sieder e Tate.<\/p>\n

Quando a diferen\u00e7a entre a temperatura da superf\u00edcie e do fluido \u00e9 grande, pode ser necess\u00e1rio considerar a varia\u00e7\u00e3o da viscosidade com a temperatura.\u00a0Portanto, uma forma modificada da\u00a0equa\u00e7\u00e3o<\/strong>\u00a0de\u00a0Dittus-Boelter<\/strong>\u00a0foi proposta por\u00a0Sieder<\/strong>\u00a0e\u00a0Tate<\/strong>\u00a0(1936).<\/p>\n

\"Equa\u00e7\u00e3o<\/a><\/p>\n

 <\/p>\n<\/div>\n<\/div>\n

\n
\n

Equa\u00e7\u00e3o de Gnielinski<\/h2>\n

Embora as\u00a0equa\u00e7\u00f5es de Dittus-Boelter<\/strong>\u00a0e\u00a0Sieder-Tate<\/strong>\u00a0sejam facilmente aplicadas e certamente sejam satisfat\u00f3rias para os fins deste artigo, erros de at\u00e9 25% podem resultar de seu uso.\u00a0Tais erros podem ser reduzidos pelo uso de correla\u00e7\u00f5es mais recentes, mas geralmente mais complexas, como a\u00a0correla\u00e7\u00e3o de Gnielinski<\/strong>\u00a0.\u00a0Esta equa\u00e7\u00e3o \u00e9 v\u00e1lida para tubos em uma grande variedade de n\u00fameros de Reynolds, incluindo a regi\u00e3o de transi\u00e7\u00e3o.<\/p>\n

\"Equa\u00e7\u00e3o<\/a><\/p>\n

O fator de atrito de Darcy<\/a>\u00a0, f,<\/strong>\u00a0\u00a0\u00e9 uma quantidade adimensional usada na\u00a0equa\u00e7\u00e3o de Darcy-Weisbach<\/a>\u00a0, para a descri\u00e7\u00e3o de\u00a0perdas por atrito<\/a>\u00a0em tubula\u00e7\u00e3o ou duto, bem como para fluxo em canal aberto.\u00a0Isso tamb\u00e9m \u00e9 chamado de\u00a0\u00a0fator de atrito de Darcy-Weisbach<\/strong>\u00a0,\u00a0\u00a0coeficiente de resist\u00eancia<\/strong>\u00a0ou simplesmente\u00a0\u00a0fator de atrito<\/strong>\u00a0.<\/p>\n

Tubos de parede \u00e1spera<\/strong><\/p>\n

Tamb\u00e9m observamos que todas essas equa\u00e7\u00f5es pertencem a tubos lisos.\u00a0Para fluxo turbulento em tubos rugosos, o coeficiente de transfer\u00eancia de calor aumenta com a\u00a0rugosidade da parede<\/a>\u00a0.\u00a0\u00c0 medida que o\u00a0n\u00famero de Reynolds<\/a>\u00a0aumenta, a subcamada viscosa se torna mais fina e menor.\u00a0No n\u00famero Reynolds muito alto, a subcamada viscosa se torna t\u00e3o fina que a rugosidade da superf\u00edcie se projeta no fluxo.\u00a0As perdas por atrito neste caso s\u00e3o produzidas no fluxo principal principalmente pelos elementos de rugosidade salientes, e a contribui\u00e7\u00e3o da subcamada laminar \u00e9 insignificante.<\/p>\n

Refer\u00eancia Especial: Um Livro de Transfer\u00eancia de Calor, John H. Lienhard IV e John H. Lienhard V. Phlogiston Press, 2012.<\/p>\n<\/div>\n<\/div>\n

<\/div>\n
<\/div>\n
\n

……………………………………………………………………………………………………………………………….<\/p>\n

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":"

Equa\u00e7\u00e3o de Sieder-Tate.\u00a0Quando a diferen\u00e7a entre a temperatura da superf\u00edcie e do fluido \u00e9 grande, pode ser necess\u00e1rio considerar a varia\u00e7\u00e3o da viscosidade com a temperatura.\u00a0Engenharia T\u00e9rmica Equa\u00e7\u00e3o de Sieder-Tate A\u00a0\u00a0correla\u00e7\u00e3o de Dittus-Boelter\u00a0\u00a0pode ser usada para diferen\u00e7as de temperatura pequenas a moderadas, T\u00a0wall\u00a0\u00a0– T\u00a0avg\u00a0, com todas as propriedades avaliadas em uma temperatura\u00a0m\u00e9dia\u00a0T\u00a0avg\u00a0. Para fluxos caracterizados … 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":"\nO que \u00e9 a Equa\u00e7\u00e3o de Sieder-Tate - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Equa\u00e7\u00e3o de Sieder-Tate. Quando a diferen\u00e7a entre a temperatura da superf\u00edcie e do fluido \u00e9 grande, pode ser necess\u00e1rio considerar a varia\u00e7\u00e3o da viscosidade com a temperatura. Engenharia T\u00e9rmica\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O que \u00e9 a Equa\u00e7\u00e3o de Sieder-Tate - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"Equa\u00e7\u00e3o de Sieder-Tate. Quando a diferen\u00e7a entre a temperatura da superf\u00edcie e do fluido \u00e9 grande, pode ser necess\u00e1rio considerar a varia\u00e7\u00e3o da viscosidade com a temperatura. Engenharia T\u00e9rmica\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermal Engineering\" \/>\n<meta property=\"article:published_time\" content=\"2019-11-05T02:02:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-01-23T13:38:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Sieder-Tate-Equation-correlation.png\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\">\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\">\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\">\n\t<meta name=\"twitter:data2\" content=\"2 minutos\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\",\"url\":\"https:\/\/www.thermal-engineering.org\/fr\/\",\"name\":\"Thermal Engineering\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.thermal-engineering.org\/fr\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/#primaryimage\",\"inLanguage\":\"pt-BR\",\"url\":\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Sieder-Tate-Equation-correlation.png\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/#webpage\",\"url\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/\",\"name\":\"O que \\u00e9 a Equa\\u00e7\\u00e3o de Sieder-Tate - Defini\\u00e7\\u00e3o\",\"isPartOf\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/#primaryimage\"},\"datePublished\":\"2019-11-05T02:02:59+00:00\",\"dateModified\":\"2020-01-23T13:38:58+00:00\",\"author\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Equa\\u00e7\\u00e3o de Sieder-Tate. Quando a diferen\\u00e7a entre a temperatura da superf\\u00edcie e do fluido \\u00e9 grande, pode ser necess\\u00e1rio considerar a varia\\u00e7\\u00e3o da viscosidade com a temperatura. Engenharia T\\u00e9rmica\",\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-sieder-tate-definicao\/\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\",\"name\":\"Nick Connor\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#personlogo\",\"inLanguage\":\"pt-BR\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/84c0dec310b44b65da29dc9df6925239?s=96&d=mm&r=g\",\"caption\":\"Nick Connor\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/posts\/47471"}],"collection":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/comments?post=47471"}],"version-history":[{"count":0,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/posts\/47471\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/media?parent=47471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/categories?post=47471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/tags?post=47471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}