<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2007000200002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Numerical simulation for the flow structures following a three-dimensional horizontal forward-facing step channel]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barbosa Saldaña]]></surname>
<given-names><![CDATA[J.G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quinto Diez]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Silva]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvajal Mariscal]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,IPN ESIME SEPI]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2007</year>
</pub-date>
<volume>53</volume>
<numero>2</numero>
<fpage>87</fpage>
<lpage>95</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2007000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2007000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2007000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A numerical code based on the finite volume discretization technique is developed to simulate flow structures following a three-dimensional horizontal forward-facing step. The link between the pressure distribution and velocity field are made by using the SIMPLE algorithm. A rectangular channel encloses the forward-facing step such that the expansion ratio (ER) and the aspect ratio (AR) are equal to two and four respectively. The total channel length in the stream-wise direction is equal to 60 times the step height and the step edge is located 20 times the step height downstream from the channel inlet. At the channel inlet the flow is considered to be a three-dimensional, fully developed flow. Results for the reattachment line, the separation line, as well as for velocity profiles at different planes for different Reynolds are presented.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este trabajo se presentan los resultados de la simulación numérica por medio de la técnica de discretización de los volúmenes finitos de las estructuras de flujo tridimensional en un ducto rectangular con un escalón al frente. Se emplea el algoritmo SIMPLE para asociar la distribución de presión y el campo de velocidad dentro del dominio computacional. El ducto que se propone es de forma rectangular y encierra un escalón, de tal forma que la relación de expansión y la relación de aspecto son iguales a dos y cuatro respectivamente. La longitud total del canal en la dirección principal del flujo es igual a 60 veces la altura del escalón, mientras que la orilla del escalón se localiza a una distancia igual a 20 veces la altura del mismo corriente abajo de la entrada del canal. A la entrada se considera que el flujo es tridimensional y completamente desarrollado. Resultados de la línea de reacomodo, línea de separación, así como perfiles de velocidad a diferentes planos dentro del ducto se presentan para diferentes parámetros de Reynolds.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Numerical simulation]]></kwd>
<kwd lng="en"><![CDATA[three dimensional]]></kwd>
<kwd lng="en"><![CDATA[forward-facing step]]></kwd>
<kwd lng="en"><![CDATA[laminar flow]]></kwd>
<kwd lng="es"><![CDATA[Simulación numérica]]></kwd>
<kwd lng="es"><![CDATA[tres dimensiones]]></kwd>
<kwd lng="es"><![CDATA[ducto con escalón al frente]]></kwd>
<kwd lng="es"><![CDATA[flujo laminar]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>Numerical simulation for the flow structures following a three&#150;dimensional horizontal forward&#150;facing step channel</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>J.G. Barbosa Salda&ntilde;a, P. Quinto Diez, F. S&aacute;nchez Silva, and I. Carvajal Mariscal</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>SEPI&#150;ESIME&#150;IPN, </i><i>LABINTHAP, Unidad Profesional Adolfo Lopez Mateos, Mexico City, Mexico.</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 8 de septiembre de 2005    <br> Aceptado el 16 de marzo de 2007</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">A numerical code based on the finite volume discretization technique is developed to simulate flow structures following a three&#150;dimensional horizontal forward&#150;facing step. The link between the pressure distribution and velocity field are made by using the SIMPLE algorithm. A rectangular channel encloses the forward&#150;facing step such that the expansion ratio (ER) and the aspect ratio (AR) are equal to two and four respectively. The total channel length in the stream&#150;wise direction is equal to 60 times the step height and the step edge is located 20 times the step height downstream from the channel inlet. At the channel inlet the flow is considered to be a three&#150;dimensional, fully developed flow. Results for the reattachment line, the separation line, as well as for velocity profiles at different planes for different Reynolds are presented.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords:</b>  Numerical simulation; three dimensional; forward&#150;facing step; laminar flow.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">En este trabajo se presentan los resultados de la simulaci&oacute;n num&eacute;rica por medio de la t&eacute;cnica de discretizaci&oacute;n de los vol&uacute;menes finitos de las estructuras de flujo tridimensional en un ducto rectangular con un escal&oacute;n al frente. Se emplea el algoritmo SIMPLE para asociar la distribuci&oacute;n de presi&oacute;n y el campo de velocidad dentro del dominio computacional. El ducto que se propone es de forma rectangular y encierra un escal&oacute;n, de tal forma que la relaci&oacute;n de expansi&oacute;n y la relaci&oacute;n de aspecto son iguales a dos y cuatro respectivamente. La longitud total del canal en la direcci&oacute;n principal del flujo es igual a 60 veces la altura del escal&oacute;n, mientras que la orilla del escal&oacute;n se localiza a una distancia igual a 20 veces la altura del mismo corriente abajo de la entrada del canal. A la entrada se considera que el flujo es tridimensional y completamente desarrollado. Resultados de la l&iacute;nea de reacomodo, l&iacute;nea de separaci&oacute;n, as&iacute; como perfiles de velocidad a diferentes planos dentro del ducto se presentan para diferentes par&aacute;metros de Reynolds.</font></p>     <p align="justify"><font face="verdana" size="2"><b><i>Descriptores: </i></b>Simulaci&oacute;n num&eacute;rica; tres dimensiones; ducto con escal&oacute;n al frente; flujo laminar.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 02.30.Cb; 83.50.Ha; 02.70.Bf; 02.30.Jr</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v53n2/v53n2a2.pdf">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     ]]></body>
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