Numerical analysis of the dispersion of a contaminant through a simplified porous medium

Numerical analysis of the dispersion of a contaminant through a simplified porous medium

It is presented the numerical analysis of the pollutant dispersion in porous media composed of infinite arrays of particles with different diameter ratios (DR). The DR ranged from 0.2 to 0.8, representing several degrees of expansion-contraction of the pore paths, not included in previous models. Th...

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Main Authors: Morales-Arévalo, Lucía, Sanjuan-Galindo, René, Ramos-Delgado, Norma Alicia, Morales-Contreras, Oscar Adrián, Mendoza-Rosas, Ana Teresa, Alonzo-García, Alejandro
Format: Online
Language:spa
Published: Universidad Autónoma de Baja California 2021
Online Access:https://recit.uabc.mx/index.php/revista/article/view/130
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spelling recit-article-1302022-10-26T16:39:48Z Numerical analysis of the dispersion of a contaminant through a simplified porous medium Análisis numérico de la dispersión de un contaminante a través de un medio poroso simplificado Morales-Arévalo, Lucía Sanjuan-Galindo, René Ramos-Delgado, Norma Alicia Morales-Contreras, Oscar Adrián Mendoza-Rosas, Ana Teresa Alonzo-García, Alejandro Medio poroso Flujo Turbulento Dispersión del contaminante Porous media Turbulent flow Pollutan dispersion It is presented the numerical analysis of the pollutant dispersion in porous media composed of infinite arrays of particles with different diameter ratios (DR). The DR ranged from 0.2 to 0.8, representing several degrees of expansion-contraction of the pore paths, not included in previous models. The corresponding porosities (f) covered the interval 0.27<f<0.72, and the pore Reynolds number was set to 50×103 which represented fully developed turbulent conditions. Results showed that for the case of DR=0.2 and f=0.27, the wake structures behind the smaller particles are elongated along with the gap spaces between particles, enhancing hence, the tracer dispersion. Oppositely, for the highest DR case, the porosity is lower and although the local velocities are high, the wake behind smaller particles are disrupted, and the homogeneity time increased drastically. Thus, eddy structures inside pore domains play a key role in the dispersion of a tracer. Taking into account that domains with large f contain less solid phase, this effect could be considered in the optimization of several engineering devices as cooling fins, arrays of tubes in heat exchangers, and static mixers to mention a few. Se presenta el análisis numérico de la dispersión de un contaminante gaseoso en un medio poroso infinito formado de un arreglo ordenado de partículas con diferentes razones de diámetros (DR). El intervalo cubierto fue 0.2<DR<0.8, el cual corresponde a variaciones sistemáticas en el grado de expansión-contracción de las trayectorias de poro, no incluidos en modelos convencionales. Las porosidades (f) correspondientes a los DR, cubrieron el intervalo 0.27<f<0.72. El número de Reynolds de poro (Re) fue igual a 50×103, correspondiendo a un flujo turbulento completamente desarrollado. Los resultados mostraron que para el caso de DR=0.2 y f=0.27, se forman estructuras de flujo recirculantes y elongadas, las cuales cubren los espacios intersticiales en los poros, provocando una intensificación de la dispersión del trazador y un menor tiempo de homogeneización. En los modelos de mayor DR y menor f, aunque las velocidades locales fueron mayores, las estructuras rotacionales fueron inhibidas y el tiempo de homogeneización aumentó. Considerando que los modelos de mayor f contienen menor cantidad de fase sólida, dicho efecto, puede ser considerado para optimizar el funcionamiento de dispositivos ingenieriles tales como aletas de enfriamiento, arreglos de tubos en intercambiadores de calor y mezcladores estáticos entre otros. Universidad Autónoma de Baja California 2021-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html text/xml https://recit.uabc.mx/index.php/revista/article/view/130 10.37636/recit.v428798 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 No. 2 (2021): April-June; 87-98 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 Núm. 2 (2021): Abril-Junio; 87-98 2594-1925 spa https://recit.uabc.mx/index.php/revista/article/view/130/255 https://recit.uabc.mx/index.php/revista/article/view/130/256 https://recit.uabc.mx/index.php/revista/article/view/130/257 Copyright (c) 2021 Lucía Morales Arévalo, Dr. René San Juan Galindo, Dra. Norma Alicia Ramos Delgado, Dr. Oscar Adrián Morales Contreras, Dra. Ana Teresa Mendoza Rosas, Dr. Alejandro Alonzo García https://creativecommons.org/licenses/by/4.0
institution RECIT
collection OJS
language spa
format Online
author Morales-Arévalo, Lucía
Sanjuan-Galindo, René
Ramos-Delgado, Norma Alicia
Morales-Contreras, Oscar Adrián
Mendoza-Rosas, Ana Teresa
Alonzo-García, Alejandro
spellingShingle Morales-Arévalo, Lucía
Sanjuan-Galindo, René
Ramos-Delgado, Norma Alicia
Morales-Contreras, Oscar Adrián
Mendoza-Rosas, Ana Teresa
Alonzo-García, Alejandro
Numerical analysis of the dispersion of a contaminant through a simplified porous medium
author_facet Morales-Arévalo, Lucía
Sanjuan-Galindo, René
Ramos-Delgado, Norma Alicia
Morales-Contreras, Oscar Adrián
Mendoza-Rosas, Ana Teresa
Alonzo-García, Alejandro
author_sort Morales-Arévalo, Lucía
title Numerical analysis of the dispersion of a contaminant through a simplified porous medium
title_short Numerical analysis of the dispersion of a contaminant through a simplified porous medium
title_full Numerical analysis of the dispersion of a contaminant through a simplified porous medium
title_fullStr Numerical analysis of the dispersion of a contaminant through a simplified porous medium
title_full_unstemmed Numerical analysis of the dispersion of a contaminant through a simplified porous medium
title_sort numerical analysis of the dispersion of a contaminant through a simplified porous medium
description It is presented the numerical analysis of the pollutant dispersion in porous media composed of infinite arrays of particles with different diameter ratios (DR). The DR ranged from 0.2 to 0.8, representing several degrees of expansion-contraction of the pore paths, not included in previous models. The corresponding porosities (f) covered the interval 0.27<f<0.72, and the pore Reynolds number was set to 50×103 which represented fully developed turbulent conditions. Results showed that for the case of DR=0.2 and f=0.27, the wake structures behind the smaller particles are elongated along with the gap spaces between particles, enhancing hence, the tracer dispersion. Oppositely, for the highest DR case, the porosity is lower and although the local velocities are high, the wake behind smaller particles are disrupted, and the homogeneity time increased drastically. Thus, eddy structures inside pore domains play a key role in the dispersion of a tracer. Taking into account that domains with large f contain less solid phase, this effect could be considered in the optimization of several engineering devices as cooling fins, arrays of tubes in heat exchangers, and static mixers to mention a few.
publisher Universidad Autónoma de Baja California
publishDate 2021
url https://recit.uabc.mx/index.php/revista/article/view/130
_version_ 1792095340463128576

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