{"id":49061,"date":"2019-11-14T08:37:56","date_gmt":"2019-11-14T07:37:56","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-fluxo-de-fluido-multifasico-definicao\/"},"modified":"2020-02-01T17:27:17","modified_gmt":"2020-02-01T16:27:17","slug":"o-que-e-fluxo-de-fluido-multifasico-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fluxo-de-fluido-multifasico-definicao\/","title":{"rendered":"O que \u00e9 fluxo de fluido multif\u00e1sico &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Por defini\u00e7\u00e3o, o fluxo multif\u00e1sico \u00e9 o fluxo interativo de duas ou mais fases distintas com interfaces comuns em, por exemplo, um condu\u00edte. Fluxo de Fluido Multif\u00e1sico<\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<div>\n<h2><span>Fluxo de fluido multif\u00e1sico<\/span><\/h2>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/two-phase-fluid-flow.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-14768 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/two-phase-fluid-flow.png\" alt=\"fluxo de fluido bif\u00e1sico\" width=\"82\" height=\"332\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/two-phase-fluid-flow.png\" \/><\/a><span>Por defini\u00e7\u00e3o, o\u00a0<\/span><strong><span>fluxo multif\u00e1sico<\/span><\/strong><span>\u00a0\u00e9 o fluxo interativo de\u00a0<\/span><strong><span>duas ou mais<\/span><\/strong><span>\u00a0fases distintas com interfaces comuns em, por exemplo, um condu\u00edte.\u00a0Cada fase, representando uma fra\u00e7\u00e3o de volume (ou fra\u00e7\u00e3o de massa) de mat\u00e9ria s\u00f3lida, l\u00edquida ou gasosa,\u00a0<\/span><strong><span>possui<\/span><\/strong><span>\u00a0propriedades,\u00a0<\/span><strong><span>velocidade<\/span><\/strong><span>\u00a0e\u00a0<\/span><strong><span>temperatura\u00a0<\/span><\/strong><span><strong>pr\u00f3prias<\/strong>\u00a0.<\/span><\/p>\n<p><span>Um fluxo multif\u00e1sico pode ser fluxo simult\u00e2neo de:<\/span><\/p>\n<ul>\n<li><span>Materiais com\u00a0<\/span><strong><span>diferentes estados ou fases<\/span><\/strong><span>\u00a0(por exemplo, mistura \u00e1gua-vapor).<\/span><\/li>\n<li><span>Materiais com\u00a0<\/span><strong><span>propriedades qu\u00edmicas diferentes,<\/span><\/strong><span>\u00a0mas no mesmo estado ou fase (por exemplo, got\u00edculas de \u00f3leo na \u00e1gua).<\/span><\/li>\n<\/ul>\n<p><span>Existem muitas combina\u00e7\u00f5es nos processos industriais, mas a\u00a0<\/span><strong><span>mais comum<\/span><\/strong><span>\u00a0\u00e9 o fluxo simult\u00e2neo de\u00a0<\/span><strong><span>vapor e \u00e1gua l\u00edquida<\/span><\/strong><span>\u00a0(como encontrado em\u00a0<\/span><a title=\"Gerador de vapor\" href=\"https:\/\/www.nuclear-power.com\/steam-generator\/\"><strong><span>geradores<\/span><\/strong>\u00a0<\/a><span>e\u00a0<\/span><strong><span>condensadores de\u00a0<\/span><\/strong><span><a title=\"Gerador de vapor\" href=\"https:\/\/www.nuclear-power.com\/steam-generator\/\"><strong>vapor<\/strong><\/a>\u00a0).\u00a0Na engenharia de reatores, muitos estudos foram realizados sobre a natureza do\u00a0<\/span><a title=\"Fluxo de fluido bif\u00e1sico\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fluxo-de-fluido-bifasico-definicao\/\"><strong><span>fluxo bif\u00e1sico<\/span><\/strong><\/a><span>\u00a0em caso de acidente com perda de l\u00edquido refrigerante (\u00a0<\/span><strong><span>LOCA<\/span><\/strong><span>\u00a0), que \u00e9 um acidente de import\u00e2ncia na seguran\u00e7a do reator e em todas as an\u00e1lises termo-hidr\u00e1ulicas (\u00a0<\/span><strong><span>An\u00e1lises DNBR<\/span><\/strong><span>\u00a0).<\/span><\/p>\n<h2><span>Caracter\u00edsticas do fluxo de fluido multif\u00e1sico<\/span><\/h2>\n<p><span>Todos os problemas de fluxo de duas fases t\u00eam caracter\u00edsticas que s\u00e3o caracteristicamente diferentes daquelas encontradas em problemas de fase \u00fanica.<\/span><\/p>\n<ul>\n<li><span>No caso de vapor e \u00e1gua l\u00edquida, a\u00a0<\/span><strong><span>densidade<\/span><\/strong><span>\u00a0das duas fases\u00a0<\/span><strong><span>difere por um fator de cerca de 1000<\/span><\/strong><span>\u00a0.\u00a0Portanto, a influ\u00eancia da for\u00e7a do corpo gravitacional nos fluxos multif\u00e1sicos \u00e9 de muito maior import\u00e2ncia do que no caso dos fluxos monof\u00e1sicos.<\/span><\/li>\n<li><span>A\u00a0<\/span><strong><span>velocidade do som<\/span><\/strong><span>\u00a0muda drasticamente para os materiais em fase de mudan\u00e7a e pode ter ordens de magnitude diferentes.\u00a0Isso influencia significativamente um\u00a0<\/span><strong><span>fluxo atrav\u00e9s de um orif\u00edcio<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>A\u00a0<\/span><strong><span>concentra\u00e7\u00e3o<\/span><\/strong><span>\u00a0relativa\u00a0de diferentes fases \u00e9 geralmente um par\u00e2metro dependente de grande import\u00e2ncia nos fluxos multif\u00e1sicos, enquanto \u00e9 um par\u00e2metro sem conseq\u00fc\u00eancia nos fluxos monof\u00e1sicos.<\/span><\/li>\n<li><span>A mudan\u00e7a de fase significa que as quedas de press\u00e3o induzidas pelo fluxo podem causar altera\u00e7\u00f5es de fase adicionais (por exemplo, a \u00e1gua pode evaporar atrav\u00e9s de um orif\u00edcio), aumentando o volume relativo do meio gasoso, compress\u00edvel e aumentando as velocidades de efluxo, diferentemente do fluxo incompress\u00edvel monof\u00e1sico, em que a diminui\u00e7\u00e3o de um orif\u00edcio diminuiria a velocidade do efluxo.<\/span><\/li>\n<li><span>A distribui\u00e7\u00e3o espacial das v\u00e1rias fases no canal de fluxo afeta fortemente o comportamento do fluxo.<\/span><\/li>\n<li><span>Existem muitos tipos de instabilidades no fluxo multif\u00e1sico.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/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<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<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Por defini\u00e7\u00e3o, o fluxo multif\u00e1sico \u00e9 o fluxo interativo de duas ou mais fases distintas com interfaces comuns em, por exemplo, um condu\u00edte. Fluxo de Fluido Multif\u00e1sico Fluxo de fluido multif\u00e1sico Por defini\u00e7\u00e3o, o\u00a0fluxo multif\u00e1sico\u00a0\u00e9 o fluxo interativo de\u00a0duas ou mais\u00a0fases distintas com interfaces comuns em, por exemplo, um condu\u00edte.\u00a0Cada fase, representando uma fra\u00e7\u00e3o de &#8230; <a title=\"O que \u00e9 fluxo de fluido multif\u00e1sico &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fluxo-de-fluido-multifasico-definicao\/\" aria-label=\"More on O que \u00e9 fluxo de fluido multif\u00e1sico &#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 fluxo de fluido multif\u00e1sico - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Por defini\u00e7\u00e3o, o fluxo multif\u00e1sico \u00e9 o fluxo interativo de duas ou mais fases distintas com interfaces comuns em, por exemplo, um condu\u00edte. 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