{"id":47340,"date":"2019-11-04T02:26:24","date_gmt":"2019-11-04T01:26:24","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-ebulicao-por-conveccao-natural-inicio-da-ebulicao-por-nucleado-definicao\/"},"modified":"2020-01-23T10:50:48","modified_gmt":"2020-01-23T09:50:48","slug":"o-que-e-ebulicao-por-conveccao-natural-inicio-da-ebulicao-por-nucleado-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-ebulicao-por-conveccao-natural-inicio-da-ebulicao-por-nucleado-definicao\/","title":{"rendered":"O que \u00e9 ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural &#8211; In\u00edcio da ebuli\u00e7\u00e3o por nucleado &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Ebuli\u00e7\u00e3o por Convec\u00e7\u00e3o Natural &#8211; In\u00edcio da Ebuli\u00e7\u00e3o Nucleada.\u00a0Convec\u00e7\u00e3o natural A ebuli\u00e7\u00e3o ocorre quando \u0394Tsat &lt;5 \u00b0 C.\u00a0O ponto A \u00e9 geralmente referido como o in\u00edcio da ebuli\u00e7\u00e3o nucleada &#8211; ONB.<\/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>Ebuli\u00e7\u00e3o por Convec\u00e7\u00e3o Natural &#8211; In\u00edcio da Ebuli\u00e7\u00e3o Nucleada<\/h2>\n<p><strong>Categoriza\u00e7\u00e3o pela temperatura de superaquecimento da parede, \u0394T\u00a0<\/strong><strong><sub>sat<\/sub><\/strong><strong>\u00a0:<\/strong><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boiling-Curve-Boiling-Modes.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-20779 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boiling-Curve-Boiling-Modes-208x300.png\" alt=\"Curva de Ebuli\u00e7\u00e3o - Modos de Ebuli\u00e7\u00e3o\" width=\"208\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boiling-Curve-Boiling-Modes-208x300.png\" \/><\/a>O trabalho pioneiro sobre a ebuli\u00e7\u00e3o foi realizado em 1934 por\u00a0\u00a0<strong>S. Nukiyama<\/strong>\u00a0, que usou fios de\u00a0<strong>nicr\u00f3mio<\/strong>\u00a0e platina aquecidos eletricamente imersos em l\u00edquidos em seus experimentos.\u00a0Nukiyama foi o primeiro a identificar\u00a0\u00a0<strong>diferentes regimes de ebuli\u00e7\u00e3o da piscina<\/strong>\u00a0\u00a0usando seu aparelho.\u00a0Ele notou que a ebuli\u00e7\u00e3o assume formas diferentes, dependendo do valor da temperatura de superaquecimento da parede\u00a0\u00a0<strong>\u0394T\u00a0<\/strong><strong><sub>sat<\/sub><\/strong>\u00a0\u00a0(tamb\u00e9m conhecida como temperatura excessiva)\u00a0<strong>,\u00a0<\/strong>\u00a0que \u00e9 definida como a diferen\u00e7a entre a temperatura da parede,\u00a0\u00a0<strong><sub>parede<\/sub><\/strong><strong>\u00a0T<\/strong>\u00a0\u00a0e a temperatura de satura\u00e7\u00e3o,\u00a0<strong>\u00a0T\u00a0<sub>sat<\/sub><\/strong>\u00a0.<\/p>\n<p>S\u00e3o observados quatro regimes diferentes de ebuli\u00e7\u00e3o da piscina (com base no excesso de temperatura):<\/p>\n<ul>\n<li><strong>Ebuli\u00e7\u00e3o por Convec\u00e7\u00e3o Natural\u00a0<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0<strong>\u0394T\u00a0<\/strong><strong><sub>sentado<\/sub><\/strong>\u00a0\u00a0&lt;5 \u00b0 C<\/li>\n<li><strong>Ebuli\u00e7\u00e3o do Nucleado<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a05 \u00b0 C &lt;\u00a0\u00a0<strong>\u0394T\u00a0<\/strong><strong><sub>sentado<\/sub><\/strong>\u00a0\u00a0&lt;30 \u00b0 C<\/li>\n<li><strong>Ebuli\u00e7\u00e3o de transi\u00e7\u00e3o<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a030 \u00b0 C &lt;\u00a0\u00a0<strong>\u0394T\u00a0<\/strong><strong><sub>sentado<\/sub><\/strong>\u00a0\u00a0&lt;200 \u00b0 C<\/li>\n<li><strong>Ebuli\u00e7\u00e3o de filme<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 200 \u00b0 C &lt;\u00a0\u00a0<strong>\u0394T\u00a0<\/strong><strong><sub>sentado<\/sub><\/strong><\/li>\n<\/ul>\n<h2>Ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural<\/h2>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Natural-Convection-Boiling-Boiling-Modes.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-20781 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Natural-Convection-Boiling-Boiling-Modes-300x235.png\" alt=\"Ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural\" width=\"300\" height=\"235\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Natural-Convection-Boiling-Boiling-Modes-300x235.png\" \/><\/a>Em\u00a0\u00a0<a title=\"Termodin\u00e2mica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/\">termodin\u00e2mica<\/a>\u00a0, o requisito para\u00a0\u00a0\u00a0ocorrer a\u00a0<strong>ebuli\u00e7\u00e3o<\/strong>\u00a0de subst\u00e2ncias puras \u00e9 que T\u00a0<sub>wall<\/sub>\u00a0\u00a0= T\u00a0<sub>sat<\/sub>\u00a0.\u00a0Mas em experimentos reais, a ebuli\u00e7\u00e3o n\u00e3o ocorre at\u00e9 que o l\u00edquido seja aquecido alguns graus acima da temperatura de satura\u00e7\u00e3o.\u00a0A temperatura da superf\u00edcie deve estar um pouco acima da temperatura de satura\u00e7\u00e3o para sustentar a forma\u00e7\u00e3o de vapor.\u00a0A ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural ocorre quando \u0394Tsat &lt;5 \u00b0 C.\u00a0Nesse\u00a0\u00a0<strong>modo de ebuli\u00e7\u00e3o<\/strong>\u00a0,\u00a0\u00a0<strong>ser\u00e1 observado vapor<\/strong>\u00a0\u00a0sobre a superf\u00edcie da \u00e1gua, mas geralmente\u00a0\u00a0<strong>n\u00e3o h\u00e1 bolhas<\/strong>\u00a0ser\u00e1 observado.\u00a0\u00c0 medida que a temperatura de superaquecimento aumenta, eventualmente ocorre o aparecimento de bolhas, mas abaixo do ponto A, o movimento do fluido \u00e9 determinado principalmente pelas correntes de convec\u00e7\u00e3o naturais.\u00a0O ponto A \u00e9 geralmente referido como o\u00a0\u00a0<strong>in\u00edcio da ebuli\u00e7\u00e3o nucleada &#8211; ONB<\/strong>\u00a0.<\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<h2><span>Ebuli\u00e7\u00e3o<\/span><\/h2>\n<figure id=\"attachment_14172\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-14172\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boiling-point-of-water.png\"><img loading=\"lazy\" class=\"size-medium wp-image-14172 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boiling-point-of-water-300x255.png\" alt=\"Diagrama de fases da \u00e1gua\" width=\"300\" height=\"255\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boiling-point-of-water-300x255.png\" \/><\/a><figcaption id=\"caption-attachment-14172\" class=\"wp-caption-text\"><span>Diagrama de fases da \u00e1gua.<\/span><br \/>\n<span>Fonte: wikipedia.org CC BY-SA<\/span><\/figcaption><\/figure>\n<p><span>Nos cap\u00edtulos anteriores, discutimos\u00a0<\/span><a title=\"Convec\u00e7\u00e3o - Transfer\u00eancia de calor por convec\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-conveccao-transferencia-de-calor-por-conveccao-definicao\/\"><strong><span>a transfer\u00eancia de calor por convec\u00e7\u00e3o<\/span><\/strong><\/a><span>\u00a0com suposi\u00e7\u00e3o muito importante.\u00a0Assumimos uma\u00a0<\/span><strong><span>transfer\u00eancia de calor por convec\u00e7\u00e3o monof\u00e1sica<\/span><\/strong><span>\u00a0sem nenhuma mudan\u00e7a de fase.\u00a0Neste cap\u00edtulo, focaremos na transfer\u00eancia de calor por convec\u00e7\u00e3o associada \u00e0\u00a0<\/span><strong><span>mudan\u00e7a na fase de um fluido<\/span><\/strong><span>\u00a0.\u00a0Em particular, consideramos processos que podem ocorrer em uma interface s\u00f3lido-l\u00edquido ou vapor-s\u00f3lido, ou seja,\u00a0<\/span><strong><span>ebuli\u00e7\u00e3o<\/span><\/strong><span>\u00a0(mudan\u00e7a de fase de l\u00edquido para vapor) e\u00a0<\/span><strong><span>condensa\u00e7\u00e3o<\/span><\/strong><span>\u00a0(\u00a0mudan\u00e7a de fase de\u00a0vapor para l\u00edquido).<\/span><\/p>\n<p><span>Para esses casos, os\u00a0<\/span><strong><span>efeitos do calor latente<\/span><\/strong><span>\u00a0associados \u00e0 mudan\u00e7a de fase s\u00e3o significativos.\u00a0<\/span><strong><a title=\"Entalpia de vaporiza\u00e7\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-enthalpy\/enthalpy-of-vaporization\/\"><span>O calor latente<\/span><\/a><span>\u00a0,<\/span><\/strong><span>\u00a0conhecido tamb\u00e9m como entalpia da vaporiza\u00e7\u00e3o, \u00e9 a quantidade de calor adicionada ou removida de uma subst\u00e2ncia para produzir uma mudan\u00e7a de fase.\u00a0Essa energia decomp\u00f5e as for\u00e7as atraentes intermoleculares e tamb\u00e9m deve fornecer a energia necess\u00e1ria para expandir o g\u00e1s (o\u00a0<\/span><strong><span>trabalho p\u0394V<\/span><\/strong><span>\u00a0).\u00a0Quando o\u00a0<\/span><strong><span>calor latente<\/span><\/strong><span>\u00a0\u00e9 adicionado, nenhuma mudan\u00e7a de temperatura ocorre.<\/span><\/p>\n<figure id=\"attachment_16677\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-16677\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Specific-Enthalpy-Water-and-Steam-min.png\"><img loading=\"lazy\" class=\"size-medium wp-image-16677 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Specific-Enthalpy-Water-and-Steam-min-242x300.png\" alt=\"Calor latente de vaporiza\u00e7\u00e3o - \u00e1gua a 0,1 MPa, 3 MPa, 16 MPa\" width=\"242\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Specific-Enthalpy-Water-and-Steam-min-242x300.png\" \/><\/a><figcaption id=\"caption-attachment-16677\" class=\"wp-caption-text\"><span>O calor da vaporiza\u00e7\u00e3o diminui com o aumento da press\u00e3o, enquanto o ponto de ebuli\u00e7\u00e3o aumenta.\u00a0Ele desaparece completamente em um determinado ponto chamado ponto cr\u00edtico.<\/span><\/figcaption><\/figure>\n<p><span>A\u00a0<\/span><strong><span>entalpia da vaporiza\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00e9 uma fun\u00e7\u00e3o da press\u00e3o na qual essa transforma\u00e7\u00e3o ocorre.<\/span><\/p>\n<p><span>Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 0,1 MPa (press\u00e3o atmosf\u00e9rica)<\/span><\/p>\n<p><strong><span>h\u00a0<\/span><\/strong><strong><sub><span>lg<\/span><\/sub><\/strong><strong><span>\u00a0= 2257 kJ \/ kg<\/span><\/strong><\/p>\n<p><span>Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 3 MPa<\/span><\/p>\n<p><strong><span>h\u00a0<\/span><\/strong><strong><sub><span>lg<\/span><\/sub><\/strong><strong><span>\u00a0= 1795 kJ \/ kg<\/span><\/strong><\/p>\n<p><span>Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 16 MPa (press\u00e3o dentro de um\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/pressurizer\/\"><span>pressurizador<\/span><\/a><span>\u00a0)<\/span><\/p>\n<p><strong><span>h\u00a0<\/span><\/strong><strong><sub><span>lg<\/span><\/sub><\/strong><strong><span>\u00a0= 931 kJ \/ kg<\/span><\/strong><\/p>\n<p><span>O\u00a0<\/span><strong><span>calor da vaporiza\u00e7\u00e3o<\/span><\/strong><span>\u00a0diminui com o aumento da press\u00e3o, enquanto o\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-saturacao-ponto-de-ebulicao-definicao\/\"><span>ponto de ebuli\u00e7\u00e3o<\/span><\/a><span>\u00a0aumenta.\u00a0Ele desaparece completamente em um determinado ponto chamado\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/critical-point-of-water\/\"><span>ponto cr\u00edtico<\/span><\/a><span>\u00a0.\u00a0Acima do ponto cr\u00edtico, as fases l\u00edquida e de vapor s\u00e3o indistingu\u00edveis, e a subst\u00e2ncia \u00e9 chamada de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/supercritical-fluid-supercritical-water\/\"><span>fluido supercr\u00edtico<\/span><\/a><span>\u00a0.<\/span><\/p>\n<p><img loading=\"lazy\" class=\"alignright size-medium wp-image-16094 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Supercritical-phase-critical-point-min-300x256.png\" alt=\"supercritical-phase-critical-point-min\" width=\"300\" height=\"256\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Supercritical-phase-critical-point-min-300x256.png\" \/><span>A mudan\u00e7a do estado l\u00edquido para o vapor devido \u00e0\u00a0<\/span><strong><span>ebuli\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00e9 sustentada pela transfer\u00eancia de calor da superf\u00edcie s\u00f3lida;\u00a0por outro lado, a\u00a0<\/span><strong><span>condensa\u00e7\u00e3o<\/span><\/strong><span>\u00a0de um vapor no estado l\u00edquido resulta na transfer\u00eancia de calor para a superf\u00edcie s\u00f3lida.\u00a0<\/span><strong><span>A ebuli\u00e7\u00e3o e a condensa\u00e7\u00e3o<\/span><\/strong><span>\u00a0diferem de outras formas de convec\u00e7\u00e3o, pois dependem do\u00a0<\/span><strong><span>calor latente de vaporiza\u00e7\u00e3o<\/span><\/strong><span>\u00a0, que \u00e9\u00a0<\/span><strong><span>muito alto<\/span><\/strong><span>\u00a0para\u00a0<\/span><a title=\"O que \u00e9 press\u00e3o - F\u00edsica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/\"><span>press\u00f5es<\/span><\/a><span>\u00a0comuns\u00a0; portanto, grandes quantidades de calor podem ser transferidas durante a ebuli\u00e7\u00e3o e a condensa\u00e7\u00e3o, essencialmente a temperatura constante.\u00a0<\/span><a title=\"Coeficiente de transfer\u00eancia de calor por convec\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-coeficiente-de-transferencia-de-calor-por-conveccao-definicao\/\"><span>Os coeficientes de transfer\u00eancia de calor<\/span><\/a><span>\u00a0, h, associados \u00e0\u00a0<\/span><strong><span>ebuli\u00e7\u00e3o e condensa\u00e7\u00e3o<\/span><\/strong><span>\u00a0s\u00e3o tipicamente\u00a0<\/span><strong><span>muito mais altos<\/span><\/strong><span>do que os encontrados em outras formas de processos de convec\u00e7\u00e3o que envolvem uma \u00fanica fase.<\/span><\/p>\n<p><span>Isso ocorre porque, mesmo em\u00a0<\/span><a title=\"Fluxo turbulento\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-fluxo-turbulento-definicao\/\"><span>fluxo turbulento<\/span><\/a><span>\u00a0, existe uma camada de filme fluido estagnada (subcamada laminar), que isola a superf\u00edcie do trocador de calor.\u00a0Essa\u00a0<\/span><strong><span>camada de filme fluido estagnado<\/span><\/strong><span>\u00a0desempenha papel crucial para o coeficiente de transfer\u00eancia de calor por convec\u00e7\u00e3o.\u00a0Observa-se que o fluido para\u00a0<\/span><strong><span>completamente na superf\u00edcie<\/span><\/strong><span>\u00a0e assume velocidade zero em rela\u00e7\u00e3o \u00e0 superf\u00edcie.\u00a0Esse fen\u00f4meno \u00e9 conhecido como condi\u00e7\u00e3o antiderrapante e, portanto,\u00a0<\/span><strong><span>na superf\u00edcie,<\/span><\/strong><span>\u00a0o fluxo de energia ocorre\u00a0<\/span><strong><span>puramente por condu\u00e7\u00e3o.\u00a0<\/span><\/strong><span>Por\u00e9m, nas pr\u00f3ximas camadas, ocorrem movimentos de condu\u00e7\u00e3o e difus\u00e3o-massa no n\u00edvel molecular ou no n\u00edvel macrosc\u00f3pico.\u00a0Devido ao movimento de massa, a taxa de transfer\u00eancia de energia \u00e9 maior.\u00a0Como foi escrito,<\/span><strong><span>a ebuli\u00e7\u00e3o de nucleados<\/span><\/strong><span>\u00a0na superf\u00edcie interrompe efetivamente essa camada estagnada e, portanto, a ebuli\u00e7\u00e3o de nucleados aumenta significativamente a capacidade de uma superf\u00edcie de transferir\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/internal-energy-thermal-energy\/\"><span>energia t\u00e9rmica<\/span><\/a><span> para o fluido a granel.<\/span><\/p>\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=\"su-spoiler-title\" tabindex=\"0\" role=\"button\">\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>Ebuli\u00e7\u00e3o por Convec\u00e7\u00e3o Natural &#8211; In\u00edcio da Ebuli\u00e7\u00e3o Nucleada.\u00a0Convec\u00e7\u00e3o natural A ebuli\u00e7\u00e3o ocorre quando \u0394Tsat &lt;5 \u00b0 C.\u00a0O ponto A \u00e9 geralmente referido como o in\u00edcio da ebuli\u00e7\u00e3o nucleada &#8211; ONB. Ebuli\u00e7\u00e3o por Convec\u00e7\u00e3o Natural &#8211; In\u00edcio da Ebuli\u00e7\u00e3o Nucleada Categoriza\u00e7\u00e3o pela temperatura de superaquecimento da parede, \u0394T\u00a0sat\u00a0: O trabalho pioneiro sobre a ebuli\u00e7\u00e3o foi &#8230; <a title=\"O que \u00e9 ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural &#8211; In\u00edcio da ebuli\u00e7\u00e3o por nucleado &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-ebulicao-por-conveccao-natural-inicio-da-ebulicao-por-nucleado-definicao\/\" aria-label=\"More on O que \u00e9 ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural &#8211; In\u00edcio da ebuli\u00e7\u00e3o por nucleado &#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 ebuli\u00e7\u00e3o por convec\u00e7\u00e3o natural - In\u00edcio da ebuli\u00e7\u00e3o por nucleado - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Ebuli\u00e7\u00e3o por Convec\u00e7\u00e3o Natural - In\u00edcio da Ebuli\u00e7\u00e3o Nucleada. 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