Pub Date : 2022-06-30DOI: 10.19053/01211129.v31.n60.2022.14487
Martha Mendoza-Becerra, Hugo-Armando Ordoñez-Eraso, M. Niño-Zambrano, C. Cobos-Lozada, R. García-Sierra
La energía eléctrica o electricidad es uno de los componentes esenciales que impulsan la economía, es decir, a que mayor crecimiento económico mayor consumo energético y viceversa. En consecuencia, el mercado eléctrico debe estar en la capacidad de cubrir el incremento en la demanda de energía, y de la misma forma, establecer estrategias para el uso eficiente de la energía. En el Reino Unido se ha potencializado la inclusión de nuevas tecnologías en el sistema eléctrico, a través de un programa de cambio automático de comercializador de energía conocido como AutoSwitch, en el cual, los usuarios ya no están sujetos a un vínculo exclusivo con su comercializador local y tienen la libertad de cambiar de comercializador de energía. En Colombia se abre la posibilidad de liberalizar el mercado de energía a través de un programa piloto de AutoSwitch, buscando inducir mayor competencia entre los comercializadores de energía por medio de la desregulación de las tarifas y facilitar a los clientes la selección del comercializador que le ofrezca un menor costo, mayor calidad en el servicio, la fuente de energía deseada, entre otros. En este artículo, se presenta una caracterización de los atributos y funcionalidades de las principales herramientas de AutoSwitch del Reino Unido. Además, la adecuación de esta caracterización a una herramienta de AutoSwitch para el mercado eléctrico colombiano, teniendo en cuenta información suministrada por la empresa Enel Codensa, relacionada con el registro de potenciales usuarios, vinculación con el comercializador de energía, visualización de ofertas, notificaciones a los usuarios, entre otros. Para llegar a la liberación del mercado eléctrico colombiano, se hace necesario promover este tipo de herramientas, con las cuales, usuarios y comercializadores puedan llegar a tener mayores beneficios.
{"title":"Caracterización de herramientas de portabilidad energética para ser aplicados en Colombia","authors":"Martha Mendoza-Becerra, Hugo-Armando Ordoñez-Eraso, M. Niño-Zambrano, C. Cobos-Lozada, R. García-Sierra","doi":"10.19053/01211129.v31.n60.2022.14487","DOIUrl":"https://doi.org/10.19053/01211129.v31.n60.2022.14487","url":null,"abstract":"La energía eléctrica o electricidad es uno de los componentes esenciales que impulsan la economía, es decir, a que mayor crecimiento económico mayor consumo energético y viceversa. En consecuencia, el mercado eléctrico debe estar en la capacidad de cubrir el incremento en la demanda de energía, y de la misma forma, establecer estrategias para el uso eficiente de la energía. En el Reino Unido se ha potencializado la inclusión de nuevas tecnologías en el sistema eléctrico, a través de un programa de cambio automático de comercializador de energía conocido como AutoSwitch, en el cual, los usuarios ya no están sujetos a un vínculo exclusivo con su comercializador local y tienen la libertad de cambiar de comercializador de energía. En Colombia se abre la posibilidad de liberalizar el mercado de energía a través de un programa piloto de AutoSwitch, buscando inducir mayor competencia entre los comercializadores de energía por medio de la desregulación de las tarifas y facilitar a los clientes la selección del comercializador que le ofrezca un menor costo, mayor calidad en el servicio, la fuente de energía deseada, entre otros. En este artículo, se presenta una caracterización de los atributos y funcionalidades de las principales herramientas de AutoSwitch del Reino Unido. Además, la adecuación de esta caracterización a una herramienta de AutoSwitch para el mercado eléctrico colombiano, teniendo en cuenta información suministrada por la empresa Enel Codensa, relacionada con el registro de potenciales usuarios, vinculación con el comercializador de energía, visualización de ofertas, notificaciones a los usuarios, entre otros. Para llegar a la liberación del mercado eléctrico colombiano, se hace necesario promover este tipo de herramientas, con las cuales, usuarios y comercializadores puedan llegar a tener mayores beneficios.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45073575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-28DOI: 10.19053/01211129.v31.n60.2022.13850
Lina-Marcela Saenz-Reyes, R. Agudelo-Valencia, Stivenzo-Rafael Ortiz-de-la-Hoz, Siby I Garcés-Polo
Se analizó el efecto de la densidad de plantación de la especie Limonium perezzi sobre la efectividad de humedales artificiales a escala de laboratorio para el tratamiento de aguas residuales de la etapa de remojo en curtiembres. La densidad de plantación fue de 10.27 plantas/m2 (HAP4) y 15.4 plantas/m2 (HAP6), el tiempo de retención hidráulica en cada humedal fue de 4.5 días y los experimentos fueron realizados por 32 días, tiempo en el que las plantas comenzaron a marchitarse, dentro de los cuales fueron tomadas muestras de agua para el respectivo análisis. Los humedales fueron operados por 8 semanas a fin de observar el deterioro de estas con respecto al tiempo. El periodo de estabilización de los humedales varió entre 7 y 10 días hasta que la concentración del efluente fue poco variable. El análisis estadístico de los resultados indica que la densidad de plantación influye sobre la efectividad del humedal en términos de porcentaje de disminución de concentración, los humedales plantados con 15.4 plantas/m2 fueron más eficientes, lo cual se determinó a partir de la prueba T de Student (p < 0.05). Los porcentajes de disminución de la demanda química de oxígeno, cloruros y sólidos disueltos totales para la mayor densidad de plantación fueron de 81 %, 54 % y 55 % respectivamente. Al igual que en estudios previos, se observó que la especie plantada tiene la habilidad de tomar sal y liberarla a través de hojas y tallos, hecho que se pudo apreciar a partir del séptimo día de operación.
{"title":"Impacto de la densidad de plantación en la eficacia de humedales artificiales a escala de laboratorio plantados con Limonium Perezzi para el tratamiento de aguas residuales de curtiembres","authors":"Lina-Marcela Saenz-Reyes, R. Agudelo-Valencia, Stivenzo-Rafael Ortiz-de-la-Hoz, Siby I Garcés-Polo","doi":"10.19053/01211129.v31.n60.2022.13850","DOIUrl":"https://doi.org/10.19053/01211129.v31.n60.2022.13850","url":null,"abstract":"Se analizó el efecto de la densidad de plantación de la especie Limonium perezzi sobre la efectividad de humedales artificiales a escala de laboratorio para el tratamiento de aguas residuales de la etapa de remojo en curtiembres. La densidad de plantación fue de 10.27 plantas/m2 (HAP4) y 15.4 plantas/m2 (HAP6), el tiempo de retención hidráulica en cada humedal fue de 4.5 días y los experimentos fueron realizados por 32 días, tiempo en el que las plantas comenzaron a marchitarse, dentro de los cuales fueron tomadas muestras de agua para el respectivo análisis. Los humedales fueron operados por 8 semanas a fin de observar el deterioro de estas con respecto al tiempo. El periodo de estabilización de los humedales varió entre 7 y 10 días hasta que la concentración del efluente fue poco variable. El análisis estadístico de los resultados indica que la densidad de plantación influye sobre la efectividad del humedal en términos de porcentaje de disminución de concentración, los humedales plantados con 15.4 plantas/m2 fueron más eficientes, lo cual se determinó a partir de la prueba T de Student (p < 0.05). Los porcentajes de disminución de la demanda química de oxígeno, cloruros y sólidos disueltos totales para la mayor densidad de plantación fueron de 81 %, 54 % y 55 % respectivamente. Al igual que en estudios previos, se observó que la especie plantada tiene la habilidad de tomar sal y liberarla a través de hojas y tallos, hecho que se pudo apreciar a partir del séptimo día de operación.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44123979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.17533/udea.redin.20220581
Abdelkader Nour, A. Benanane, H. Varum
The widespread use of masonry infill walls in the most prone zones to earthquakes, for the execution of multistoried reinforced concrete buildings, as well as the recorded damage caused by earthquakes, have forced us to study their influence on the seismic behavior of these buildings. The distribution of masonry infill walls in these buildings is mainly related to their architectural requirements. The purpose of this article is to assess the influence of the various locations of chained masonry walls, which represent a particular type of masonry infill walls without gaps, on multistoried reinforced concrete buildings. This variation has been studied using the SAP finite element software, by the pushover method, analyzing several two-dimensional multistoried reinforced concrete frames infilled by double-leaf hollow brick walls. The proposed frames have been analyzed by varying the position of the chained masonry walls, based on the seismic criteria of the period, elastic base shear, elastic lateral displacement, ultimate base shear, and initial stiffness. The results were compared according to the above criteria. After comparing the results, it is very clear that the position of the masonry walls has a great influence on the seismic response of the reinforced concrete frames. Therefore, it is very important to take into account the position of the infill in the design phase.
{"title":"Seismic behavior of reinforced concrete buildings using chained masonry walls randomly located","authors":"Abdelkader Nour, A. Benanane, H. Varum","doi":"10.17533/udea.redin.20220581","DOIUrl":"https://doi.org/10.17533/udea.redin.20220581","url":null,"abstract":"The widespread use of masonry infill walls in the most prone zones to earthquakes, for the execution of multistoried reinforced concrete buildings, as well as the recorded damage caused by earthquakes, have forced us to study their influence on the seismic behavior of these buildings. The distribution of masonry infill walls in these buildings is mainly related to their architectural requirements. The purpose of this article is to assess the influence of the various locations of chained masonry walls, which represent a particular type of masonry infill walls without gaps, on multistoried reinforced concrete buildings. This variation has been studied using the SAP finite element software, by the pushover method, analyzing several two-dimensional multistoried reinforced concrete frames infilled by double-leaf hollow brick walls. The proposed frames have been analyzed by varying the position of the chained masonry walls, based on the seismic criteria of the period, elastic base shear, elastic lateral displacement, ultimate base shear, and initial stiffness. The results were compared according to the above criteria. After comparing the results, it is very clear that the position of the masonry walls has a great influence on the seismic response of the reinforced concrete frames. Therefore, it is very important to take into account the position of the infill in the design phase.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":"463 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85566622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.19053/01211129.v31.n60.2022.14311
C. García-Ubaque, Rodolfo Vergel
This article presents some reflections on ethics in mathematics classes in engineering majors. We conceptualize ethics as the forms of relationship with the other or the otherness forms. Once the production and learning of mathematics are conceived as processual events that occur in concrete human practice, ethics is considered an inescapable element to consider, as the theory of objectification suggests. In the first part, this study addresses a brief contextualization of the relationship between mathematics teaching and learning and engineering from an ethical point of view. Then, an approach to Radford's theory of objectification and its ethical position is presented. In the third part, this study addresses an instrument design that allowed to explore preliminarily in a group of university mathematics professors the types of ethics applied in the classrooms. The fourth part of the article focuses on the analysis of the responses. Finally, we present some reflections and suggestions for future studies.
{"title":"Need for Communitarian Ethics in Mathematics Teaching-Learning in Engineering Careers","authors":"C. García-Ubaque, Rodolfo Vergel","doi":"10.19053/01211129.v31.n60.2022.14311","DOIUrl":"https://doi.org/10.19053/01211129.v31.n60.2022.14311","url":null,"abstract":"This article presents some reflections on ethics in mathematics classes in engineering majors. We conceptualize ethics as the forms of relationship with the other or the otherness forms. Once the production and learning of mathematics are conceived as processual events that occur in concrete human practice, ethics is considered an inescapable element to consider, as the theory of objectification suggests. In the first part, this study addresses a brief contextualization of the relationship between mathematics teaching and learning and engineering from an ethical point of view. Then, an approach to Radford's theory of objectification and its ethical position is presented. In the third part, this study addresses an instrument design that allowed to explore preliminarily in a group of university mathematics professors the types of ethics applied in the classrooms. The fourth part of the article focuses on the analysis of the responses. Finally, we present some reflections and suggestions for future studies.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43062097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-21DOI: 10.19053/01211129.v31.n60.2022.13913
Andres-Fernando Gil-Plazas, Julián-David Rubiano-Buitrago, Luis-Alejandro Boyacá-Mendivelso, L. Herrera-Quintero
4340 steel powders were processed with an additive manufacturing process using the FFF (Fused Filament Fabrication) technique. A composite filament was developed to print samples and study the effect of the bed and nozzle temperatures on its physical and microstructural properties. The printed samples were debinded and sintered by: Solid State (SS) at 1300 °C or SLPS (Supersolidus Liquid Phase Sintering) at 1420 °C. Metallography and scanning electron microscopy (SEM) identified the microstructure and phases. The hardness of the sintered samples was measured with the Vickers method. The SLPS process contributes to better densification and volume contraction; however, it promotes geometrical distortion of the samples compared to the SS samples. The microstructure of the sintered samples consists of ferrite situated in the original austenite grain and bainite. The sintering mechanism significantly influenced the hardness of the samples. Finally, a part was designed, printed, debinded, and sintered with the aim of studying the maximum inclination angle, the minimum vertical and horizontal holes, and the minimum vertical layer thickness, which can be obtained through the whole process.
{"title":"Solid-State and Super Solidus Liquid Phase Sintering of 4340 Steel SLM Powders Shaped by Fused Filament Fabrication","authors":"Andres-Fernando Gil-Plazas, Julián-David Rubiano-Buitrago, Luis-Alejandro Boyacá-Mendivelso, L. Herrera-Quintero","doi":"10.19053/01211129.v31.n60.2022.13913","DOIUrl":"https://doi.org/10.19053/01211129.v31.n60.2022.13913","url":null,"abstract":"4340 steel powders were processed with an additive manufacturing process using the FFF (Fused Filament Fabrication) technique. A composite filament was developed to print samples and study the effect of the bed and nozzle temperatures on its physical and microstructural properties. The printed samples were debinded and sintered by: Solid State (SS) at 1300 °C or SLPS (Supersolidus Liquid Phase Sintering) at 1420 °C. Metallography and scanning electron microscopy (SEM) identified the microstructure and phases. The hardness of the sintered samples was measured with the Vickers method. The SLPS process contributes to better densification and volume contraction; however, it promotes geometrical distortion of the samples compared to the SS samples. The microstructure of the sintered samples consists of ferrite situated in the original austenite grain and bainite. The sintering mechanism significantly influenced the hardness of the samples. Finally, a part was designed, printed, debinded, and sintered with the aim of studying the maximum inclination angle, the minimum vertical and horizontal holes, and the minimum vertical layer thickness, which can be obtained through the whole process.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42531052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-21DOI: 10.19053/01211129.v31.n60.2022.14189
Elizabeth Suescún-Monsalve, Julio-Cesar Sampaio-do-Prado-Leite, C. Pardo-Calvache
Systematic literature reviews represent an important methodology in Evidence-Based Software Engineering. To define the methodological route in these type of studies, in which a review of quantitative and qualitative aspects of primary studies is carried out to summarize the existing information regarding a particular topic, researchers use protocols that guide the construction of knowledge from research questions. This article presents a process that uses forward Snowballing, which identifies the articles cited in the paper under study and the number of citations as inclusion criteria to complement systematic literature reviews. A process that relies on software tools was designed to apply the Snowballing strategy and to identify the most cited works and those who cite them. To validate the process, a review identified in the literature was used. After comparing the results, new works that were not taken into account but made contributions to the subject of study emerged. The citation index represents the number of times a publication has been referenced in other documents and is used as a mechanism to analyze, measure, or quantitatively assess the impact of said publication on the scientific community. The present study showed how applying Snowballing along with other strategies enables the emergence of works that may be relevant for an investigation given the citations rate. That is, implementing this proposal will allow updating or expanding systematic literature studies through the new works evidenced.
{"title":"Semi-Automatic Mapping Technique Using Snowballing to Support Massive Literature Searches in Software Engineering","authors":"Elizabeth Suescún-Monsalve, Julio-Cesar Sampaio-do-Prado-Leite, C. Pardo-Calvache","doi":"10.19053/01211129.v31.n60.2022.14189","DOIUrl":"https://doi.org/10.19053/01211129.v31.n60.2022.14189","url":null,"abstract":"Systematic literature reviews represent an important methodology in Evidence-Based Software Engineering. To define the methodological route in these type of studies, in which a review of quantitative and qualitative aspects of primary studies is carried out to summarize the existing information regarding a particular topic, researchers use protocols that guide the construction of knowledge from research questions. This article presents a process that uses forward Snowballing, which identifies the articles cited in the paper under study and the number of citations as inclusion criteria to complement systematic literature reviews. A process that relies on software tools was designed to apply the Snowballing strategy and to identify the most cited works and those who cite them. To validate the process, a review identified in the literature was used. After comparing the results, new works that were not taken into account but made contributions to the subject of study emerged. The citation index represents the number of times a publication has been referenced in other documents and is used as a mechanism to analyze, measure, or quantitatively assess the impact of said publication on the scientific community. The present study showed how applying Snowballing along with other strategies enables the emergence of works that may be relevant for an investigation given the citations rate. That is, implementing this proposal will allow updating or expanding systematic literature studies through the new works evidenced.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46413972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-16DOI: 10.17533/udea.redin.20220579
R. Martínez, C. Pons, Rocío Rodríguez, P. Vera
Este trabajo muestra la situación actual del Gobierno Abierto a nivel latinoamericano enfocado en la calidad de los datos abiertos disponibles relacionados con COVID-19. Los datos analizados se refieren a emergencias sanitarias y tareas para la lucha contra la pandemia. Estos datos son críticos porque se utilizan para mejorar la gestión de los servicios públicos y recursos ante esta contingencia. Se han analizado los diferentes aspectos de calidad de los datos abiertos que se encuentran disponibles en los portales gubernamentales. Para este análisis se tomaron como referencia varios documentos de reconocidos organismos internacionales sobre aspectos, problemáticas actuales y buenas prácticas. Para realizar la investigación, se eligieron 6 países como fuente de datos: Argentina, Colombia, México, Perú, Paraguay y Uruguay. Para cada uno de ellos se analizaron sus portales públicos, y se prestó especial atención a los aspectos de calidad que propone cada país, así como si existen o no herramientas de control. Finalmente, se utilizó la herramienta HEVDA para realizar una verificación de la calidad de los datos abiertos a partir de una propuesta de 8 métricas de calidad. La herramienta se aplicó a una muestra de 15 conjuntos de datos de cada país en aspectos de COVID-19 (90 datasets). El aporte de este trabajo es identificar el grado de calidad que presentan los datos abiertos de estos países a través de una herramienta de validación de desarrollo propio (HEVDA)
{"title":"Estudio de calidad de datos de gobierno abierto relacionados con COVID-19 en América Latina","authors":"R. Martínez, C. Pons, Rocío Rodríguez, P. Vera","doi":"10.17533/udea.redin.20220579","DOIUrl":"https://doi.org/10.17533/udea.redin.20220579","url":null,"abstract":"Este trabajo muestra la situación actual del Gobierno Abierto a nivel latinoamericano enfocado en la calidad de los datos abiertos disponibles relacionados con COVID-19. Los datos analizados se refieren a emergencias sanitarias y tareas para la lucha contra la pandemia. Estos datos son críticos porque se utilizan para mejorar la gestión de los servicios públicos y recursos ante esta contingencia. Se han analizado los diferentes aspectos de calidad de los datos abiertos que se encuentran disponibles en los portales gubernamentales. Para este análisis se tomaron como referencia varios documentos de reconocidos organismos internacionales sobre aspectos, problemáticas actuales y buenas prácticas. Para realizar la investigación, se eligieron 6 países como fuente de datos: Argentina, Colombia, México, Perú, Paraguay y Uruguay. Para cada uno de ellos se analizaron sus portales públicos, y se prestó especial atención a los aspectos de calidad que propone cada país, así como si existen o no herramientas de control. Finalmente, se utilizó la herramienta HEVDA para realizar una verificación de la calidad de los datos abiertos a partir de una propuesta de 8 métricas de calidad. La herramienta se aplicó a una muestra de 15 conjuntos de datos de cada país en aspectos de COVID-19 (90 datasets). El aporte de este trabajo es identificar el grado de calidad que presentan los datos abiertos de estos países a través de una herramienta de validación de desarrollo propio (HEVDA)","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":"703 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76895047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-16DOI: 10.17533/udea.redin.20220580
Sebastián Sepúlveda-Cano, C. A. Vega-Posada, E. García-Aristizabal
A numerical analysis is conducted to evaluate the effective radius of air advance (Reff) in coarse-grained, saturated, sandy deposits improved by means of air injection (i.e., soil desaturation). It is well-known that the cyclic resistance to liquefaction of a saturated sandy deposit is highly affected by the presence of gas in the void space. A parametric study is performed to investigate the soil’s main hydraulic parameters and air-injection conditions of the transient gas affecting Reff and controlling the desaturation process. The effects of the a) soil-water characteristic curve, b) intrinsic permeability, c) injection pressure, and d) duration of air injection are investigated. It is shown that the injection pressure and soil’s intrinsic permeability are the main factors influencing the extent of Reff. The analysed cases showed that, for a fixed injection pressure, the soil will achieve a maximum value for Reff. This threshold value is reached more rapidly when the soil’s intrinsic permeability increases. The results aim to shorten existing knowledge gaps and contribute to the development of design methodologies for air-injection desaturation techniques.
{"title":"Numerical analysis of soil desaturation by an air injection method","authors":"Sebastián Sepúlveda-Cano, C. A. Vega-Posada, E. García-Aristizabal","doi":"10.17533/udea.redin.20220580","DOIUrl":"https://doi.org/10.17533/udea.redin.20220580","url":null,"abstract":"A numerical analysis is conducted to evaluate the effective radius of air advance (Reff) in coarse-grained, saturated, sandy deposits improved by means of air injection (i.e., soil desaturation). It is well-known that the cyclic resistance to liquefaction of a saturated sandy deposit is highly affected by the presence of gas in the void space. A parametric study is performed to investigate the soil’s main hydraulic parameters and air-injection conditions of the transient gas affecting Reff and controlling the desaturation process. The effects of the a) soil-water characteristic curve, b) intrinsic permeability, c) injection pressure, and d) duration of air injection are investigated. It is shown that the injection pressure and soil’s intrinsic permeability are the main factors influencing the extent of Reff. The analysed cases showed that, for a fixed injection pressure, the soil will achieve a maximum value for Reff. This threshold value is reached more rapidly when the soil’s intrinsic permeability increases. The results aim to shorten existing knowledge gaps and contribute to the development of design methodologies for air-injection desaturation techniques.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":"21 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81777510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-16DOI: 10.17533/udea.redin.20220578
Luis Felipe Gutiérrez-Marcantoni, S. Elaskar, J. Tamagno
Computational Fluid Dynamics (CFD), through high-performance computing and robust codes, has proven to be an invaluable tool for the simulation of combustion processes, ranging from low speeddiffusive flames up to detonations. This work intends to provide a review of details needed in modeling asReynolds-averaged Navier–Stokes (RANS), large eddy simulation (LES) or Detached eddy simulation (DES)energy equation in CFD codes used for solving chemically reacting turbulent flows. When the density is variable, traditional Reynolds averages introduce many open correlations between any quantity f and density fluctuations which are difficult to close. Therefore, Favre’s mass-weighted average technique must be preferred.
{"title":"The energy equation for modeling reacting flows on RANS, LES and DES approaches","authors":"Luis Felipe Gutiérrez-Marcantoni, S. Elaskar, J. Tamagno","doi":"10.17533/udea.redin.20220578","DOIUrl":"https://doi.org/10.17533/udea.redin.20220578","url":null,"abstract":"Computational Fluid Dynamics (CFD), through high-performance computing and robust codes, has proven to be an invaluable tool for the simulation of combustion processes, ranging from low speeddiffusive flames up to detonations. This work intends to provide a review of details needed in modeling asReynolds-averaged Navier–Stokes (RANS), large eddy simulation (LES) or Detached eddy simulation (DES)energy equation in CFD codes used for solving chemically reacting turbulent flows. When the density is variable, traditional Reynolds averages introduce many open correlations between any quantity f and density fluctuations which are difficult to close. Therefore, Favre’s mass-weighted average technique must be preferred.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":"18 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84107925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-02DOI: 10.17533/udea.redin.20220576
L. Niño-Álvarez, O. Begambre-Carrillo
In civil engineering, structural optimization seeks an efficient use of material resources and the automatization of the design process of a wide range of structures such as frames, bridges, and other systems. This work develops a novel multiobjective topology optimization process to minimize planar trusses' weight and strain energy. In the initial stage, an optimized discrete geometry of the ground structure is generated from a continuum design space with general boundary conditions (loads and supports) using the stress trajectories theory. In the final stage, size optimization is performed using the concept of Envelope Pareto Front (EVP), which is obtained from the best solutions provided by three efficient multiobjective metaheuristic algorithms (NSGA-II, MOPSO and AMOSA). The results obtained on a large-scale truss (200 m span continuous bridge) showed that innovative geometries could be found (new connectivity patterns). The generation of an EVP allows getting a more significant number of non-dominated solutions, exploring a broader region of the Pareto front and the two objective functions, achieving greater convergence and diversity than the algorithms' individual performance. The computation cost of the optimization strategy was satisfactory, which allows its potential implementation in actual large-scale trusses, discovering optimized, innovative solutions for this type of structures.
{"title":"Multiobjective topology optimization of planar trusses using stress trajectories and metaheuristic algorithms","authors":"L. Niño-Álvarez, O. Begambre-Carrillo","doi":"10.17533/udea.redin.20220576","DOIUrl":"https://doi.org/10.17533/udea.redin.20220576","url":null,"abstract":"In civil engineering, structural optimization seeks an efficient use of material resources and the automatization of the design process of a wide range of structures such as frames, bridges, and other systems. This work develops a novel multiobjective topology optimization process to minimize planar trusses' weight and strain energy. In the initial stage, an optimized discrete geometry of the ground structure is generated from a continuum design space with general boundary conditions (loads and supports) using the stress trajectories theory. In the final stage, size optimization is performed using the concept of Envelope Pareto Front (EVP), which is obtained from the best solutions provided by three efficient multiobjective metaheuristic algorithms (NSGA-II, MOPSO and AMOSA). The results obtained on a large-scale truss (200 m span continuous bridge) showed that innovative geometries could be found (new connectivity patterns). The generation of an EVP allows getting a more significant number of non-dominated solutions, exploring a broader region of the Pareto front and the two objective functions, achieving greater convergence and diversity than the algorithms' individual performance. The computation cost of the optimization strategy was satisfactory, which allows its potential implementation in actual large-scale trusses, discovering optimized, innovative solutions for this type of structures.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":"26 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90480798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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