Ciência e Natura最新文献

Numerical humidity assessment: analysis of the thermal performance of a residential building 湿度数值评估：住宅楼热性能分析

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x74572

Michele Soares Netto, Ruth da Silva Brum, Cesar Antonio Oropesa Avellaneda, Joseane da Silva Porto, Taís Pereira da Silva

{"title":"Numerical humidity assessment: analysis of the thermal performance of a residential building","authors":"Michele Soares Netto, Ruth da Silva Brum, Cesar Antonio Oropesa Avellaneda, Joseane da Silva Porto, Taís Pereira da Silva","doi":"10.5902/2179460x74572","DOIUrl":"https://doi.org/10.5902/2179460x74572","url":null,"abstract":"The earth-air heat exchanger (EAHE) is a device where the external ambient air is blown to use the ground as a heat source, through buried ducts with the aid of low power fans, thus powering the energy consumed in the building. The air at the outlet of the ducts is heated in winter and cooled in summer, providing thermal comfort conditions for indoor environments. The goal of the extensive search in recent decades has been to find solutions that can improve a building’s thermal comfort in order to provide recommendations for the design of various devices utilized in the utilization of renewable energy sources. This work aims to evaluate the results found for humidity and air temperature in a building. The objective was to create a computational model that depicts practical operating circumstances for a building’s ground-to-ground heat exchangers. These evaluations were carried out by numerical simulation with the EnergyPlus software, for which a meteorological file was created. To examine the building’s behavior in various climates, the data are shown for two typical project days: one in the summer and one in the winter.","PeriodicalId":348075,"journal":{"name":"Ciência e Natura","volume":" 71","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138620329","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}

引用次数: 0

Asymptotic homogenization with finite elements for an orthotropic radially microperiodic sphere 用有限元对正交径向微周期球体进行渐近均质化处理

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x73779

João Geraldo Menezes de Oliveira Neto, Fabio Carlos da Rocha, Leslie Darien Pérez Fernández, Maria do Socorro Martins Sampaio, Julián Bravo Castillero

{"title":"Asymptotic homogenization with finite elements for an orthotropic radially microperiodic sphere","authors":"João Geraldo Menezes de Oliveira Neto, Fabio Carlos da Rocha, Leslie Darien Pérez Fernández, Maria do Socorro Martins Sampaio, Julián Bravo Castillero","doi":"10.5902/2179460x73779","DOIUrl":"https://doi.org/10.5902/2179460x73779","url":null,"abstract":"This paper proposes a semi-analytical methodology that combines the asymptotic homogenization method (AHM) with the finite elements method (FEM) to solve boundary-value problems with rapidly oscillating coefficients. This approach is motivated by the convergence difficulties observed when this type of problem is addressed directly via FEM, whereas the AHM has shown to be efficacious for obtaining good generic approximations of the exact solution. Illustratively, this AHM-FEM methodology is developed for the mechanical equilibrium problem of a radially microperiodic orthotropic sphere under hydrostatic pressure, which allows its validation by comparing with the AHM analytical solution. Specifically, the effective coefficients and the homogenized and local problems are calculated via AHM, and then their analytical and FEM solutions are obtained. Finally, to validate the semianalytical methodology, the generic solutions are applied in an example and, from the obtained results, a comparison is made between the analytical AHM solution and the semi-analytical AHM-FEM solution.","PeriodicalId":348075,"journal":{"name":"Ciência e Natura","volume":" 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138620758","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}

引用次数: 0

Pollutant dispersion model in landfills by GILTT technique 利用 GILTT 技术建立垃圾填埋场污染物扩散模型

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x74925

Josiane Konradt, Igor da Cunha Furtado, R. Quadros, Daniela Buske, G. J. Weymar

引用次数: 0

Desempenho do teste ADF em séries estacionárias na presença de quebras estruturais 在存在结构断裂的情况下对静态序列进行 ADF 检验的性能

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x75150

Mariane Coelho Amaral, Anderson Silveira, V. Mattos, A. Konrath, L. Nakamura

{"title":"Desempenho do teste ADF em séries estacionárias na presença de quebras estruturais","authors":"Mariane Coelho Amaral, Anderson Silveira, V. Mattos, A. Konrath, L. Nakamura","doi":"10.5902/2179460x75150","DOIUrl":"https://doi.org/10.5902/2179460x75150","url":null,"abstract":"O estudo de séries temporais vem se tornando cada vez mais necessário, dado o volume de dados observados e medidos ao longo dos anos. Dentre as características mais importantes das séries temporais, tem-se a estacionariedade, que é majoritariamente analisada pelos testes de raiz unitária. É consenso na literatura que as quebras estruturais, quando presentes nas séries, podem viesar o resultado do Teste de Dickey-Fuller Aumentado (ADF). No entanto, até o momento, a intensidade com que as quebras afetam o poder do teste ADF não é clara, dificultando a tomada de decisão acerca da utilização deste teste e podendo induzir a erros quando a série contar com rupturas estruturais. Este trabalho comprova a influência de quebras estruturais do tipo level shift (LS) na análise de estacionariedade em séries temporais anuais estacionárias pelo do Teste ADF, quantificando seu poder. Conclui-se que o Teste ADF tende a não rejeitar a hipótese nula na presença de rupturas em uma possível confusão com a presença de raiz unitária. Ainda, ao aumentar a perturbação inicial ω, o poder do teste foi sendo rapidamente reduzido, principalmente com quebras de mudança de nível imputadas nas posições mais próximas à origem da série de dados.","PeriodicalId":348075,"journal":{"name":"Ciência e Natura","volume":" 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138609984","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}

引用次数: 0

Computational model validation of the rolled shapes calendering process 轧制成型压延工艺的计算模型验证

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x74455

Mauricio da Silva Moreira, João Henrique C. Souza, C. E. M. Guilherme, Liércio André Isoldi

引用次数: 0

XXV ENMC / XIII ECTM / 9º MCSul / IX SEMENGO 第 XXV 届 ENMC / 第 XIII 届 ECTM / 第 9 届 MCSul / 第 IX 届 SEMENGO

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x84749

Daniela Buske

{"title":"XXV ENMC / XIII ECTM / 9º MCSul / IX SEMENGO","authors":"Daniela Buske","doi":"10.5902/2179460x84749","DOIUrl":"https://doi.org/10.5902/2179460x84749","url":null,"abstract":"In 2022, the events XXV National Meeting of Computational Modeling (XXV ENMC) and XIII Meeting of Science and Technology of Materials (XIII ECTM) took place from October 19 to 21, 2022, with all activities of the event carried out in the webinar modality. In this particular year, together with the XXV ENMC and the XIII ECTM, the 9th Southern Conference on Computational Modeling (9th MCSul) and the IX Seminar and Workshop on Ocean Engineering (IX SEMENGO) were held, providing the opportunity to bring together researchers from related areas of knowledge.\u0000The events included lectures from the area of Computational Modeling in Brazil and abroad; its organization was the result of a collaboration between professors from ten public teaching institutions in the country, under the coordination of researchers from universities in Rio Grande do Sul; the event had more than 250 manuscripts submitted and presented in 57 technical sessions, with emphasis on the contributions made by graduate students.\u0000The Organizing Committee selected a sample of original works presented at the event with an interdisciplinary theme. This led to the publication, in December 2023, of this special edition of the XXV ENMC / XIII ECTM / 9º MCSul / IX SEMENGO. We thank the authors who contributed to the high level of this edition.\u0000We wish you all a pleasant reading.","PeriodicalId":348075,"journal":{"name":"Ciência e Natura","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138615948","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}

引用次数: 0

Conductional heat transfer in magmatic intrusions 岩浆侵入体中的传导传热

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x75134

Tamires Bojjis da Costa, Marcelo Schramm, C. Z. Petersen, F. Tumelero

{"title":"Conductional heat transfer in magmatic intrusions","authors":"Tamires Bojjis da Costa, Marcelo Schramm, C. Z. Petersen, F. Tumelero","doi":"10.5902/2179460x75134","DOIUrl":"https://doi.org/10.5902/2179460x75134","url":null,"abstract":"The thermal effect that occurs due to the insertion of igneous intrusions in sedimentary basins has been widely investigated in different geological contexts, either to obtain more precise information about the development of the basin and or for the purpose of exploring and evaluating the mineral resources existing there. We can verify that the knowledge of the thermal gradient is fundamental in studies of heat distribution through means such as the Earth's crust or mantle, as this way, we obtain the thermal evolution of magmatic intrusions and adjacent rocks over geological time. For the present work, the determination of the temperature gradient and consequently the thermal evolution of a 13-meter-thick sill and adjacent rocks located in the Paraná Basin - Irati Formation, was obtained through the use of the one-dimensional heat dispersion model in transient regime of finite time, in which, in the spatial variable the numerical method of finite differences (FDM) is used and in the temporal variable the Euler method. Although in cases of large and thick magmatic bodies or sections that include the terrestrial lithospheric and asthenospheric mantles, the mechanism of convection and radiation has an expressive role in the energy transfer process. However, in most geological situations, conduction is the most important mechanism in the heat distribution process.","PeriodicalId":348075,"journal":{"name":"Ciência e Natura","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138617160","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}

引用次数: 0

Impacto da assimilação 3DVAR no ciclone subtropical Yakecan 3DVAR 同化对副热带气旋 Yakecan 的影响

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x74269

F. P. Härter, Leonardo Calvetti, E. H. Shiguemori, F. C. Rossatto

引用次数: 0

Retaining of dredging waste using geotextile tubes: analysis of the dewatering and undrained shear resistance of the sludge cake 使用土工织物管截留疏浚废料：污泥饼的脱水和不排水剪切阻力分析

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x75152

Larissa Macedo Aguiar Irala, Eduarda Giovana Schnorenberger, Diego de Freitas Fagundes

{"title":"Retaining of dredging waste using geotextile tubes: analysis of the dewatering and undrained shear resistance of the sludge cake","authors":"Larissa Macedo Aguiar Irala, Eduarda Giovana Schnorenberger, Diego de Freitas Fagundes","doi":"10.5902/2179460x75152","DOIUrl":"https://doi.org/10.5902/2179460x75152","url":null,"abstract":"The city of Rio Grande has its economy linked to coastal and port activities and has a port complex of high economic importance for the region. To maintain the depth of the port channels, periodic dredging operations are carried out, as occurred in the Port of Rio Grande between 2018 and 2020. Approximately 16 million m³ of sediments were removed from the channel and deposited in disposal zones. There has been an attempt to develop techniques that carry out the reuse and disposal of dredging waste more appropriately, seeking to minimize environmental impacts by avoiding inappropriate open-sea or onshore disposal. Within this context, this work aims to evaluate the potential of the retaining and dewatering process of dredging waste in geotextile tubs (linear geoforms, geobags e etc). This technique reduces the volume of dredged mud through desiccation and allows the geotextile tubs to be installed in sedimentation basins onshore or coastal protection structures. Thus, the present study evaluated the dewatering and filtration efficiency of these systems through tests of small bags. The advantages of adding flocculation polymer and the behavior of undrained shear strength over time of the retained cake were evaluated.","PeriodicalId":348075,"journal":{"name":"Ciência e Natura","volume":" 97","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138613870","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}

引用次数: 0

Engineering system design using the vibrating particles system algorithm 使用振动粒子系统算法进行工程系统设计

Ciência e Natura Pub Date : 2023-12-01 DOI: 10.5902/2179460x74073

Fran Sérgio Lobato, Jéssica Cristiane Andrade

引用次数: 0