<?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>S2007-24222019000500154</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2019-05-06</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Método para estimar las constantes de la ley logarítmica]]></article-title>
<article-title xml:lang="en"><![CDATA[Method to estimate the constants of the logarithmic law]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza-González]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Chávez]]></surname>
<given-names><![CDATA[Ariosto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano de Tecnología del Agua  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<volume>10</volume>
<numero>5</numero>
<fpage>154</fpage>
<lpage>176</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222019000500154&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222019000500154&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222019000500154&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este documento se presenta un procedimiento para determinar las constantes empíricas de von Kármán &#954; y de adición A de la ley de distribución de velocidad logarítmica, y se fundamenta en una estimación global de los valores mínimos de error entre el modelo de la ley logarítmica y los datos de una medición. Para verificar la bondad del método propuesto, se realizó una comparación con otros métodos presentados en la literatura, utilizando los datos de un perfil de velocidad obtenidos en un canal de pendiente variable de sección rectangular, con un velocímetro acústico de efecto Doppler (ADV, Acoustic Doppler Velocimeter). La prueba experimental fue en flujo uniforme con fondo de rugosidad &#119896;s = 0.000535 m y un número de Reynolds &#119877;&#119890; &gt; 36 000. El método propuesto permite estimar de forma simultánea las constantes &#954; y A, localizando un valor óptimo denominado &#119864;min en un plano bidimensional de estimación de error de las constantes. Los resultados del método propuesto en comparación con otros reportados en la literatura indican una mejora o al menos una estimación similar. Además, se comprobó el ajuste de la ley logarítmica con los valores obtenidos de la prueba experimental en el rango establecido 30 &lt; &#119910;+ &lt; 0.3&#120575;+, utilizando los valores calculados de &#954; y A con el método propuesto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This paper presents a procedure to determine the empirical constants of von Kármán &#954; and additive A of the law of logarithmic velocity distribution, is based on a global estimation of the minimum values of error between the logarithmic law model and the data of a measurement. To verify the goodness of the proposed method, a comparison was made with other methods presented in the literature, using the data of a velocity profile obtained in a variable slope channel of rectangular section, with an Acoustic Doppler Velocimeter (ADV). The experimental test was in uniform flow with bed roughness &#119896;s = 0.000535 m and Reynolds number &#119877;&#119890; &gt; 36 000. The proposed method allows to simultaneously estimate the empirical constants &#954; and A, locating an optimal value called &#119864;min in a two-dimensional plane of error estimation of the constants. The results of the proposed method compared to others reported in the literature indicate an improvement or at least a similar estimate. In addition, the adjustment of the logarithmic law with the values obtained from the experimental test in the established range 30 &lt; &#119910;+ &lt; 0.3&#120575;+ was verified, using the calculated values of &#954; and A with the proposed method.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ley logarítmica]]></kwd>
<kwd lng="es"><![CDATA[constante de von Kármán]]></kwd>
<kwd lng="es"><![CDATA[constante de adición]]></kwd>
<kwd lng="es"><![CDATA[velocimetría acústica Doppler]]></kwd>
<kwd lng="en"><![CDATA[Logarithmic law]]></kwd>
<kwd lng="en"><![CDATA[von Kármán constant]]></kwd>
<kwd lng="en"><![CDATA[additive constant]]></kwd>
<kwd lng="en"><![CDATA[acoustic Doppler velocimetry]]></kwd>
</kwd-group>
</article-meta>
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