{"id":49145,"date":"2019-11-14T18:01:43","date_gmt":"2019-11-14T17:01:43","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-a-equacao-de-bernoulli-estendida-definicao\/"},"modified":"2020-02-01T20:25:18","modified_gmt":"2020-02-01T19:25:18","slug":"o-que-e-a-equacao-de-bernoulli-estendida-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-bernoulli-estendida-definicao\/","title":{"rendered":"O que \u00e9 a equa\u00e7\u00e3o de Bernoulli estendida &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">A equa\u00e7\u00e3o de Bernoulli estendida \u00e9 muito \u00fatil para resolver a maioria dos problemas de fluxo de fluidos.\u00a0A equa\u00e7\u00e3o a seguir \u00e9 uma forma da equa\u00e7\u00e3o de Bernoulli estendida.<\/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>Equa\u00e7\u00e3o de Bernoulli estendida<\/h2>\n<p>Existem duas\u00a0<strong>premissas<\/strong>\u00a0principais\u00a0, que foram aplicadas na deriva\u00e7\u00e3o da\u00a0<a title=\"Equa\u00e7\u00e3o de Bernoulli - Princ\u00edpio de Bernoulli\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-bernoulli-principio-de-bernoulli-definicao\/\"><strong>equa\u00e7\u00e3o de Bernoulli simplificada<\/strong><\/a>\u00a0.<\/p>\n<ul>\n<li>A primeira restri\u00e7\u00e3o \u00e0 equa\u00e7\u00e3o de Bernoulli \u00e9 que\u00a0<strong>nenhum trabalho pode<\/strong>\u00a0ser realizado no fluido ou por ele.\u00a0Essa \u00e9 uma limita\u00e7\u00e3o significativa, porque a maioria dos sistemas hidr\u00e1ulicos (especialmente em\u00a0<a title=\"Engenharia nuclear\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/\">engenharia nuclear<\/a>\u00a0) inclui bombas.\u00a0Essa restri\u00e7\u00e3o impede que dois pontos em uma corrente de fluido sejam analisados \u200b\u200bse existir uma bomba entre os dois pontos.<\/li>\n<\/ul>\n<ul>\n<li>A segunda restri\u00e7\u00e3o \u00e0 equa\u00e7\u00e3o simplificada de Bernoulli \u00e9 que\u00a0<strong>nenhum atrito de fluido<\/strong>\u00a0\u00e9 permitido na solu\u00e7\u00e3o de problemas hidr\u00e1ulicos.\u00a0Na realidade, o\u00a0<strong>atrito desempenha papel crucial<\/strong>\u00a0.\u00a0A cabe\u00e7a total possu\u00edda pelo fluido n\u00e3o pode ser transferida completamente e sem perdas de um ponto para outro.\u00a0Na realidade, um objetivo das bombas incorporadas em um sistema hidr\u00e1ulico \u00e9 superar as perdas de press\u00e3o devido ao atrito.<\/li>\n<\/ul>\n<figure id=\"attachment_14299\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-14299\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Q-H.png\"><img loading=\"lazy\" class=\"size-medium wp-image-14299 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Q-H-300x207.png\" alt=\"Diagrama caracter\u00edstico de QH da bomba centr\u00edfuga e do gasoduto\" width=\"300\" height=\"207\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Q-H-300x207.png\" \/><\/a><figcaption id=\"caption-attachment-14299\" class=\"wp-caption-text\">Diagrama caracter\u00edstico de QH da bomba centr\u00edfuga e do gasoduto<\/figcaption><\/figure>\n<p>Devido a essas restri\u00e7\u00f5es, a maioria das aplica\u00e7\u00f5es pr\u00e1ticas\u00a0<strong>da equa\u00e7\u00e3o de Bernoulli<\/strong>\u00a0simplificada\u00a0para sistemas hidr\u00e1ulicos reais \u00e9 muito limitada.\u00a0Para lidar com as perdas de carga e o trabalho da bomba, a\u00a0<strong>equa\u00e7\u00e3o de Bernoulli<\/strong>\u00a0simplificada\u00a0<strong>deve ser modificada<\/strong>\u00a0.<\/p>\n<p>A equa\u00e7\u00e3o de Bernoulli pode ser modificada para levar em conta\u00a0<strong>ganhos e perdas de cabe\u00e7a<\/strong>\u00a0.\u00a0A equa\u00e7\u00e3o resultante, denominada\u00a0<strong>equa\u00e7\u00e3o de Bernoulli estendida<\/strong>\u00a0, \u00e9 muito \u00fatil na solu\u00e7\u00e3o da maioria dos problemas de fluxo de fluidos.\u00a0A equa\u00e7\u00e3o a seguir \u00e9 uma forma da equa\u00e7\u00e3o de Bernoulli estendida.<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Extended-Bernoulli-Equation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-14315 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Extended-Bernoulli-Equation.png\" alt=\"Equa\u00e7\u00e3o de Bernoulli estendida\" width=\"441\" height=\"64\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Extended-Bernoulli-Equation.png\" \/><\/a><\/p>\n<p><span>em que:<\/span><br \/>\n<span>h = altura acima do n\u00edvel de refer\u00eancia (m)<\/span><br \/>\n<span>v = velocidade m\u00e9dia do fluido (m \/ s)<\/span><br \/>\n<span>p = press\u00e3o do fluido (Pa)<\/span><br \/>\n<span>H\u00a0<\/span><sub><span>bomba<\/span><\/sub><span>\u00a0= cabe\u00e7ote adicionado pela bomba (m)<\/span><br \/>\n<span>H\u00a0<\/span><sub><span>atrito<\/span><\/sub><span>\u00a0= perda de cabe\u00e7ote devido ao atrito do fluido ( m)<\/span><br \/>\n<span>g = acelera\u00e7\u00e3o devido \u00e0 gravidade (m \/ s\u00a0<\/span><sup><span>2<\/span><\/sup><span>\u00a0)<\/span><\/p>\n<p><strong><span>A perda de carga<\/span><\/strong><span>\u00a0(ou a perda de press\u00e3o) devido \u00e0 fric\u00e7\u00e3o de fluido (H\u00a0<\/span><sub><span>atrito<\/span><\/sub><span>\u00a0) representa a energia utilizada para vencer o atrito causado por as paredes do tubo.\u00a0A perda de\u00a0<strong>carga<\/strong>\u00a0que ocorre nos tubos \u00e9 dependente da\u00a0<\/span><strong><span>velocidade<\/span><\/strong><span>\u00a0do\u00a0<strong>fluxo, di\u00e2metro<\/strong>\u00a0e\u00a0<\/span><strong><span>comprimento do\u00a0<\/span><\/strong><span><strong>tubo<\/strong>\u00a0, e um\u00a0<\/span><strong><span>fator de atrito<\/span><\/strong><span>\u00a0baseado na rugosidade do tubo e no\u00a0<\/span><strong><span>n\u00famero<\/span><\/strong><span>\u00a0de\u00a0<strong>Reynolds<\/strong>\u00a0do fluxo.\u00a0Um sistema de tubula\u00e7\u00e3o contendo muitos encaixes e juntas de tubos, converg\u00eancia de tubos, diverg\u00eancia, espiras, rugosidade da superf\u00edcie e outras propriedades f\u00edsicas tamb\u00e9m aumentar\u00e1 a perda de carga de um sistema hidr\u00e1ulico.<\/span><\/p>\n<p><span>Embora a\u00a0<strong>perda de carga\u00a0<\/strong><\/span><strong><span>represente uma perda de energia<\/span><\/strong><span>\u00a0, ela\u00a0<\/span><strong><span>n\u00e3o representa uma perda de energia total<\/span><\/strong><span>\u00a0do fluido.\u00a0A energia total do fluido conserva como conseq\u00fc\u00eancia da\u00a0<\/span><strong><span>lei de conserva\u00e7\u00e3o de energia<\/span><\/strong><span>\u00a0.\u00a0Na realidade, a perda de carga devido ao atrito resulta em um\u00a0<\/span><strong><span>aumento<\/span><\/strong><span>\u00a0equivalente\u00a0<strong>na energia interna<\/strong>\u00a0(aumento da temperatura) do fluido.<\/span><\/p>\n<p><span>A maioria dos m\u00e9todos para avaliar a perda de carga por atrito \u00e9 baseada quase que exclusivamente em evid\u00eancias experimentais.\u00a0Isso ser\u00e1 discutido nas pr\u00f3ximas se\u00e7\u00f5es.<\/span><\/p>\n<p>&nbsp;<\/p>\n<\/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","protected":false},"excerpt":{"rendered":"<p>A equa\u00e7\u00e3o de Bernoulli estendida \u00e9 muito \u00fatil para resolver a maioria dos problemas de fluxo de fluidos.\u00a0A equa\u00e7\u00e3o a seguir \u00e9 uma forma da equa\u00e7\u00e3o de Bernoulli estendida. Equa\u00e7\u00e3o de Bernoulli estendida Existem duas\u00a0premissas\u00a0principais\u00a0, que foram aplicadas na deriva\u00e7\u00e3o da\u00a0equa\u00e7\u00e3o de Bernoulli simplificada\u00a0. A primeira restri\u00e7\u00e3o \u00e0 equa\u00e7\u00e3o de Bernoulli \u00e9 que\u00a0nenhum trabalho pode\u00a0ser &#8230; <a title=\"O que \u00e9 a equa\u00e7\u00e3o de Bernoulli estendida &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-equacao-de-bernoulli-estendida-definicao\/\" aria-label=\"More on O que \u00e9 a equa\u00e7\u00e3o de Bernoulli estendida &#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 equa\u00e7\u00e3o de Bernoulli estendida - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A equa\u00e7\u00e3o de Bernoulli estendida \u00e9 muito \u00fatil para resolver a maioria dos problemas de fluxo de fluidos. 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