{"id":40081,"date":"2019-09-17T14:51:45","date_gmt":"2019-09-17T13:51:45","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/que-es-el-numero-critico-de-reynolds-definicion\/"},"modified":"2020-01-07T10:02:22","modified_gmt":"2020-01-07T09:02:22","slug":"que-es-el-numero-critico-de-reynolds-definicion","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/es\/que-es-el-numero-critico-de-reynolds-definicion\/","title":{"rendered":"\u00bfQu\u00e9 es el n\u00famero cr\u00edtico de Reynolds? Definici\u00f3n"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">El n\u00famero cr\u00edtico de Reynolds est\u00e1 asociado con la transici\u00f3n laminar-turbulenta, en la que un flujo laminar se vuelve turbulento.\u00a0N\u00famero cr\u00edtico de Reynolds<\/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>N\u00famero cr\u00edtico de Reynolds<\/h2>\n<p><strong><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-Number.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-14465 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-Number-300x151.png\" alt=\"n\u00famero de reynolds\" width=\"300\" height=\"151\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Reynolds-Number-300x151.png\" \/><\/a>El\u00a0<a title=\"Numero Reynolds\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/reynolds-number\/\">n\u00famero de Reynolds<\/a><\/strong>\u00a0\u00a0es la relaci\u00f3n de\u00a0\u00a0<strong>fuerzas de inercia\u00a0<\/strong>\u00a0a\u00a0\u00a0<strong>fuerzas viscosas<\/strong>\u00a0\u00a0y es un par\u00e1metro conveniente para predecir si una condici\u00f3n de flujo ser\u00e1\u00a0\u00a0<strong><a title=\"Flujo Laminar - Flujo Viscoso\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-el-flujo-laminar-flujo-viscoso-definicion\/\">laminar<\/a>\u00a0o\u00a0<a title=\"Flujo turbulento\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-el-flujo-turbulento-definicion\/\">turbulento<\/a><\/strong>\u00a0.<\/p>\n<p>El\u00a0<strong>n\u00famero cr\u00edtico de Reynolds<\/strong>\u00a0\u00a0est\u00e1 asociado con la\u00a0\u00a0<strong>transici\u00f3n laminar-turbulenta,\u00a0<\/strong>\u00a0en la que un flujo laminar se vuelve turbulento.\u00a0Este es un proceso extraordinariamente complicado, que actualmente no se comprende completamente.<\/p>\n<h2>N\u00famero cr\u00edtico de Reynolds para flujo en una tuber\u00eda<\/h2>\n<p>Para el flujo en una tuber\u00eda de di\u00e1metro\u00a0\u00a0<span class=\"texhtml\"><i>D<\/i><\/span>\u00a0, las observaciones experimentales muestran que para el flujo &#8220;completamente desarrollado&#8221;, el n\u00famero cr\u00edtico de Reynolds es aproximadamente\u00a0\u00a0<strong>Re\u00a0<sub>d, crit<\/sub>\u00a0\u00a0= 2300.<\/strong><\/p>\n<ul>\n<li><strong>Flujo laminar.\u00a0<\/strong>\u00a0Para fines pr\u00e1cticos, si el n\u00famero de Reynolds es\u00a0\u00a0<strong>menor que 2000<\/strong>\u00a0, el flujo es laminar.\u00a0El n\u00famero de transici\u00f3n aceptado de Reynolds para el flujo en una tuber\u00eda circular es\u00a0\u00a0<strong>Re\u00a0<sub>d, crit<\/sub>\u00a0\u00a0= 2300.<\/strong><\/li>\n<li><strong>Flujo transitorio.\u00a0<\/strong>\u00a0En los n\u00fameros de Reynolds\u00a0\u00a0<strong>entre aproximadamente 2000 y 4000,<\/strong>\u00a0\u00a0el flujo es inestable como resultado del inicio de la turbulencia.\u00a0Estos flujos a veces se denominan flujos de transici\u00f3n.<\/li>\n<li><strong>Flujo turbulento.\u00a0<\/strong>\u00a0Si el n\u00famero de Reynolds es\u00a0\u00a0<strong>mayor que 3500<\/strong>\u00a0, el flujo es turbulento.<\/li>\n<\/ul>\n<p>Tenga en cuenta que el n\u00famero cr\u00edtico de Reynolds es diferente para cada geometr\u00eda.<\/p>\n<h2>N\u00famero de Reynolds cr\u00edtico en el flujo de la capa l\u00edmite sobre una placa plana.<\/h2>\n<div>\n<p>Al determinar si la capa l\u00edmite es laminar o turbulenta, con frecuencia es razonable suponer que la transici\u00f3n comienza en alg\u00fan lugar\u00a0<strong>x\u00a0<sub>cr\u00edtico<\/sub><\/strong>\u00a0, como se muestra en la figura.\u00a0Esta ubicaci\u00f3n est\u00e1 determinada por el n\u00famero cr\u00edtico de Reynolds,\u00a0<strong>Re\u00a0<sub>x, crit<\/sub><\/strong>\u00a0.\u00a0Para el flujo sobre una placa plana,<\/p>\n<div>\n<p><strong>La transici\u00f3n de la<\/strong>\u00a0\u00a0capa l\u00edmite\u00a0<strong>laminar a turbulenta<\/strong>\u00a0ocurre cuando el n\u00famero de Reynolds en x excede\u00a0\u00a0<strong>Re\u00a0<sub>x, cr\u00edtico<\/sub><\/strong><strong>\u00a0\u00a0~ 500,000<\/strong>\u00a0.\u00a0La transici\u00f3n puede ocurrir antes, pero depende especialmente de la\u00a0<strong>rugosidad de<\/strong>\u00a0la\u00a0\u00a0<strong>superficie<\/strong>\u00a0.\u00a0La capa l\u00edmite turbulenta se espesa m\u00e1s r\u00e1pidamente que la capa l\u00edmite laminar como resultado del aumento de la tensi\u00f3n de corte en la superficie del cuerpo.<\/p>\n<div><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boundary-layer-on-flat-plate.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-14390 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boundary-layer-on-flat-plate.png\" alt=\"Capa l\u00edmite en placa plana\" width=\"1025\" height=\"357\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boundary-layer-on-flat-plate.png\" \/><\/a><\/div>\n<div>\n<h2><span>Ejemplo: n\u00famero cr\u00edtico de Reynolds<\/span><\/h2>\n<p><span>Una placa plana larga y delgada se coloca paralelo a un\u00a0\u00a0<\/span><strong><span>1 m \/ s<\/span><\/strong><span>\u00a0\u00a0corriente de agua a\u00a0<\/span><strong><span>\u00a020 \u00b0 C<\/span><\/strong><span>\u00a0.\u00a0Suponga que la viscosidad cinem\u00e1tica del agua a 20 \u00b0 C es igual a\u00a0\u00a0<\/span><strong><span>1 \u00d7 10\u00a0<\/span><sup><span>-6<\/span><\/sup><span>\u00a0\u00a0m\u00a0<\/span><sup><span>2<\/span><\/sup><span>\u00a0\/ s<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><span>A\u00a0\u00a0<\/span><strong><span>qu\u00e9 distancia x<\/span><\/strong><span>\u00a0\u00a0del borde de ataque estar\u00e1 la\u00a0\u00a0<\/span><strong><span>transici\u00f3n<\/span><\/strong><span>\u00a0\u00a0de la capa l\u00edmite laminar a la turbulenta (es decir, encontrar Re\u00a0<\/span><sub><span>x<\/span><\/sub><span>\u00a0\u00a0~ 500,000).<\/span><\/p>\n<p><strong><span>Soluci\u00f3n:<\/span><\/strong><\/p>\n<p><span>Para ubicar la transici\u00f3n de la capa l\u00edmite laminar a turbulenta, tenemos que encontrar x en la cual\u00a0\u00a0<\/span><strong><span>Re\u00a0<\/span><sub><span>x<\/span><\/sub><span>\u00a0\u00a0~ 500,000<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><strong><span>x<\/span><\/strong><span>\u00a0\u00a0= 500 000 x 1 \u00d7 10\u00a0<\/span><sup><span>-6<\/span><\/sup><span>\u00a0\u00a0[m\u00a0<\/span><sup><span>2<\/span><\/sup><span>\u00a0\/ s] \/ 1 [m \/ s] =\u00a0\u00a0<\/span><strong><span>0,5 m<\/span><\/strong><\/p>\n<\/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>Este art\u00edculo se basa en la traducci\u00f3n autom\u00e1tica del art\u00edculo original en ingl\u00e9s. Para m\u00e1s informaci\u00f3n vea el art\u00edculo en ingl\u00e9s. Puedes ayudarnos. Si desea corregir la traducci\u00f3n, env\u00edela a: translations@nuclear-power.com o complete el formulario de traducci\u00f3n en l\u00ednea. Agradecemos su ayuda, actualizaremos la traducci\u00f3n lo antes posible. Gracias.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>El n\u00famero cr\u00edtico de Reynolds est\u00e1 asociado con la transici\u00f3n laminar-turbulenta, en la que un flujo laminar se vuelve turbulento.\u00a0N\u00famero cr\u00edtico de Reynolds N\u00famero cr\u00edtico de Reynolds El\u00a0n\u00famero de Reynolds\u00a0\u00a0es la relaci\u00f3n de\u00a0\u00a0fuerzas de inercia\u00a0\u00a0a\u00a0\u00a0fuerzas viscosas\u00a0\u00a0y es un par\u00e1metro conveniente para predecir si una condici\u00f3n de flujo ser\u00e1\u00a0\u00a0laminar\u00a0o\u00a0turbulento\u00a0. El\u00a0n\u00famero cr\u00edtico de Reynolds\u00a0\u00a0est\u00e1 asociado con la\u00a0\u00a0transici\u00f3n &#8230; <a title=\"\u00bfQu\u00e9 es el n\u00famero cr\u00edtico de Reynolds? Definici\u00f3n\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-el-numero-critico-de-reynolds-definicion\/\" aria-label=\"M\u00e1s en \u00bfQu\u00e9 es el n\u00famero cr\u00edtico de Reynolds? Definici\u00f3n\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u00bfQu\u00e9 es el n\u00famero cr\u00edtico de Reynolds? 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