<?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>2007-2422</journal-id>
<journal-title><![CDATA[Tecnología y ciencias del agua]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnol. cienc. agua]]></abbrev-journal-title>
<issn>2007-2422</issn>
<publisher>
<publisher-name><![CDATA[Instituto Mexicano de Tecnología del Agua, Coordinación de Comunicación, Participación e Información]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-24222021000400042</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2021-04-02</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Una revisión de las metodologías para estimar el coeficiente de pérdidas en curvas de tuberías bajo flujo turbulento]]></article-title>
<article-title xml:lang="en"><![CDATA[A review of the methodologies for estimating the coefficient of losses in pipe curves under turbulent flow]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villegas-León]]></surname>
<given-names><![CDATA[José Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Lambraño]]></surname>
<given-names><![CDATA[Alvaro Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aranda-Pérez]]></surname>
<given-names><![CDATA[Darío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Ramos]]></surname>
<given-names><![CDATA[Alvaro Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Baja California Facultad de Ingeniería, Arquitectura y Diseño ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Baja California Facultad de Ingeniería, Arquitectura y Diseño ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano de Tecnología del Agua  ]]></institution>
<addr-line><![CDATA[Jiutepec Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Baja California Facultad de Ingeniería, Arquitectura y Diseño ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Pontificia Bolivariana Facultad de Ingeniería Civil ]]></institution>
<addr-line><![CDATA[Ensenada Montería]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>4</numero>
<fpage>42</fpage>
<lpage>111</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222021000400042&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222021000400042&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222021000400042&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se presenta una revisión de las metodologías reportadas en la literatura para estimar el coeficiente de pérdidas en curvas simples de tuberías e instaladas en serie con forma en L, S, U y Z. La información se expone organizada en orden cronológico y homogenizada para su comparación, proporcionando el coeficiente en función del ángulo de la curva, de la relación del radio con respecto al diámetro interno y del número de Reynolds. A partir de este análisis, se exhibe un sumario, donde se contrastan características y parámetros considerados en cada metodología, así como la presentación de resultados y especificaciones de validez. Con ello, se ha encontrado que se dispone de metodologías diferentes para obtener el coeficiente de pérdidas, mediante las cuales se obtienen valores distintos, que pueden deberse principalmente a desigualdades en el material analizado y en los factores adoptados en las investigaciones. Las curvas simples e instaladas en serie más estudiadas son de ángulo de 90º con condición gradual y en forma-U (180º), respectivamente. Los trabajos más sugeridos para estimar el coeficiente en curvas son los de Kirchbach (1929) e Ito (1959, 1960); sin embargo, en el manual de Idel&#8217;chik (1966) se presenta la más amplia información para todos los dispositivos estudiados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A review of the methodologies reported in the literature is presented to estimate the coefficient of losses in simple pipe curves and installed in series with L-shape, S, U and Z. The information is presented organized in chronological order and homogenized for comparison, providing the coefficient according to the angle of the curve, the ratio of the radius to the internal diameter and the Reynolds number. From this analysis, a summary is displayed where characteristics and parameters considered in each methodology are contrasted, as well as the presentation of results and validity specifications. With this it has been found that different methodologies are available to obtain the loss coefficient, through which different values are obtained, which may be due mainly to inequalities in the material analyzed and, in the factors, adopted in the investigations. The most studied simple and installed series curves are of 90º angle with gradual condition and U-shape (180º), respectively. The most suggested works to estimate the coefficient in curves are those of Kirchbach (1929) and Ito (1959, 1960); however, the Idel&#8217;chik (1966) manual presents the most extensive information for all the devices studied.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[curvas de tuberías]]></kwd>
<kwd lng="es"><![CDATA[pérdida de energía]]></kwd>
<kwd lng="es"><![CDATA[coeficiente de pérdida]]></kwd>
<kwd lng="es"><![CDATA[flujo turbulento]]></kwd>
<kwd lng="es"><![CDATA[flujo en tuberías]]></kwd>
<kwd lng="es"><![CDATA[modelación hidráulica]]></kwd>
<kwd lng="en"><![CDATA[Pipe curves]]></kwd>
<kwd lng="en"><![CDATA[loss of energy]]></kwd>
<kwd lng="en"><![CDATA[loss coefficient]]></kwd>
<kwd lng="en"><![CDATA[turbulent flow]]></kwd>
<kwd lng="en"><![CDATA[flow in pipes]]></kwd>
<kwd lng="en"><![CDATA[hydraulic modeling]]></kwd>
</kwd-group>
</article-meta>
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