{"id":43814,"date":"2019-10-13T21:28:49","date_gmt":"2019-10-13T20:28:49","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quest-ce-que-la-convection-naturelle-exemple-probleme-de-solution-definition\/"},"modified":"2020-02-17T08:34:50","modified_gmt":"2020-02-17T07:34:50","slug":"quest-ce-que-la-convection-naturelle-exemple-probleme-de-solution-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-convection-naturelle-exemple-probleme-de-solution-definition\/","title":{"rendered":"Qu&#8217;est-ce que la convection naturelle &#8211; Exemple &#8211; Probl\u00e8me de solution &#8211; D\u00e9finition"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Convection naturelle &#8211; Exemple &#8211; Probl\u00e8me de solution.\u00a0D\u00e9terminez le nombre de Nusselt pour la convection naturelle en utilisant la corr\u00e9lation simple pour une plaque plane verticale.\u00a0G\u00e9nie thermique<\/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>Exemple: Convection naturelle &#8211; Assiette plate<\/h2>\n<p>Une plaque verticale de 10 cm de haut est maintenue \u00e0 261 \u00b0 C dans de l\u2019eau comprim\u00e9e \u00e0 260 \u00b0 C (16 MPa).\u00a0D\u00e9terminez le\u00a0<strong>nombre de Nusselt en<\/strong>\u00a0utilisant la corr\u00e9lation simple pour une plaque plate verticale.<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-free-convection-equation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20653 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-free-convection-equation.png\" alt=\"exemple - convection libre - \u00e9quation\" width=\"515\" height=\"84\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-free-convection-equation.png\" \/><\/a><\/p>\n<p>Pour calculer le nombre de Rayleigh, nous devons savoir:<\/p>\n<ul>\n<li>le coefficient de dilatation thermique, qui est:\u00a0<strong>\u03b2 = 0.0022<\/strong><\/li>\n<li>le\u00a0<a title=\"Quel est le nombre de Prandtl\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/introduction-to-heat-transfer\/characteristic-numbers\/what-is-prandtl-number\/\">nombre de Prandtl<\/a>\u00a0(pour 260 \u00b0 C), qui est:\u00a0<strong>Pr = 0.87<\/strong><\/li>\n<li>la viscosit\u00e9 cin\u00e9matique (pour 260 \u00b0 C), qui est\u00a0<strong>\u03bd = 0,13 x 10\u00a0<sup>-6<\/sup><\/strong>\u00a0(\u00e0 noter que cette valeur est nettement inf\u00e9rieure \u00e0 celle de 20 \u00b0 C)<\/li>\n<\/ul>\n<p>Le\u00a0<strong>nombre de Rayleigh<\/strong>\u00a0r\u00e9sultant\u00a0est:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-flow-regime.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20654 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-flow-regime.png\" alt=\"exemple - convection naturelle - r\u00e9gime d'\u00e9coulement\" width=\"498\" height=\"164\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-flow-regime.png\" \/><\/a><\/p>\n<p>Le nombre de Nusselt r\u00e9sultant, qui repr\u00e9sente l&#8217;am\u00e9lioration du transfert de chaleur \u00e0 travers une couche de fluide r\u00e9sultant de la\u00a0<strong>convection par rapport \u00e0 la conduction \u00e0<\/strong>\u00a0travers la m\u00eame couche de fluide, est le suivant:<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-solution.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20655 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-solution.png\" alt=\"exemple - convection naturelle - solution\" width=\"464\" height=\"46\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/example-natural-convection-solution.png\" \/><\/a><\/p>\n<\/div>\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<div class=\"su-accordion\">\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-arrow\" data-anchor=\"References\">\n<div class=\"su-spoiler-content su-clearfix\"><\/div>\n<\/div>\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>Cet article est bas\u00e9 sur la traduction automatique de l&#8217;article original en anglais. Pour plus d&#8217;informations, voir l&#8217;article en anglais. Pouvez vous nous aider Si vous souhaitez corriger la traduction, envoyez-la \u00e0 l&#8217;adresse: translations@nuclear-power.com ou remplissez le formulaire de traduction en ligne. Nous appr\u00e9cions votre aide, nous mettrons \u00e0 jour la traduction le plus rapidement possible. Merci<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Convection naturelle &#8211; Exemple &#8211; Probl\u00e8me de solution.\u00a0D\u00e9terminez le nombre de Nusselt pour la convection naturelle en utilisant la corr\u00e9lation simple pour une plaque plane verticale.\u00a0G\u00e9nie thermique Exemple: Convection naturelle &#8211; Assiette plate Une plaque verticale de 10 cm de haut est maintenue \u00e0 261 \u00b0 C dans de l\u2019eau comprim\u00e9e \u00e0 260 \u00b0 C &#8230; <a title=\"Qu&#8217;est-ce que la convection naturelle &#8211; Exemple &#8211; Probl\u00e8me de solution &#8211; D\u00e9finition\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-convection-naturelle-exemple-probleme-de-solution-definition\/\" aria-label=\"En savoir plus sur Qu&#8217;est-ce que la convection naturelle &#8211; Exemple &#8211; Probl\u00e8me de solution &#8211; D\u00e9finition\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la convection naturelle - Exemple - Probl\u00e8me de solution - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"Convection naturelle - Exemple - Probl\u00e8me de solution. 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