Pub Date : 2023-07-18DOI: 10.26678/ABCM.ENCIT2022.CIT22-0192
A. N. Carloni, J. Azevedo
The present paper develops a reduced-order model capable of modeling unsteady aerodynamic loads in the transonic regime using system identification techniques. The computational fluid dynamics (CFD) calculations are based on the Euler equations and the code uses a finite volume formulation for general unstructured grids. A centered spatial discretization with added artificial dissipation is used, and an explicit Runge-Kutta time marching method is employed. For comparison reasons, unsteady calculations are performed using mode-by-mode and simultaneous excitation approaches. System identification techniques are employed to allow the splitting of the aerodynamic coefficient time histories into the contribution of each individual mode to the corresponding aerodynamic transfer function. Such methodology is applied to model the aerodynamic terms of the aeroelastic state-space system particularly of a NACA 0012 airfoil-based typical section. Results demonstrate the importance of signal processing techniques to compute the aerodynamic transfer functions and also the advantageous applicability of transonic unsteady aerodynamic reduced-order models to perform aeroelastic analyses in the frequency domain.
{"title":"Development of Transonic Unsteady Aerodynamic Reduced-Order Models Using System Identification Techniques","authors":"A. N. Carloni, J. Azevedo","doi":"10.26678/ABCM.ENCIT2022.CIT22-0192","DOIUrl":"https://doi.org/10.26678/ABCM.ENCIT2022.CIT22-0192","url":null,"abstract":"The present paper develops a reduced-order model capable of modeling unsteady aerodynamic loads in the transonic regime using system identification techniques. The computational fluid dynamics (CFD) calculations are based on the Euler equations and the code uses a finite volume formulation for general unstructured grids. A centered spatial discretization with added artificial dissipation is used, and an explicit Runge-Kutta time marching method is employed. For comparison reasons, unsteady calculations are performed using mode-by-mode and simultaneous excitation approaches. System identification techniques are employed to allow the splitting of the aerodynamic coefficient time histories into the contribution of each individual mode to the corresponding aerodynamic transfer function. Such methodology is applied to model the aerodynamic terms of the aeroelastic state-space system particularly of a NACA 0012 airfoil-based typical section. Results demonstrate the importance of signal processing techniques to compute the aerodynamic transfer functions and also the advantageous applicability of transonic unsteady aerodynamic reduced-order models to perform aeroelastic analyses in the frequency domain.","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121085033","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 : 2023-06-08DOI: 10.26678/abcm.encit2022.cit22-0610
Daniel Botezelli, Elisan dos Santos Magalhães, Davi Antônio dos Santos
{"title":"A GPU ACCELERATED ALGORITHM FOR SOLVING NAVIER-STOKES EQUATIONS","authors":"Daniel Botezelli, Elisan dos Santos Magalhães, Davi Antônio dos Santos","doi":"10.26678/abcm.encit2022.cit22-0610","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0610","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133981149","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 : 2023-02-06DOI: 10.26678/abcm.encit2022.cit22-0014
Pedro Siqueira Zatta, Beatriz Jacob Furlan, Rafaela Mirabile, Rafael Silva Ribeiro Gonçalves, Paulo Alexandre Silveira da Silva, Dhyogo Miléo Taher, Gilvana Scoculi de Lira, L. Martins, J. Ordóñez, Jose Viriato Coelho Vargas
Algae are ubiquitous organisms whose capabilities have drawn much attention as of late in the bioengineering field due to their potential to enable a wide range of bioproducts. Microalgae are ideal organisms for the application of the biorefinery concept since they can be grown in wastewater and, at the same time, produce many products of commercial interest. These microorganisms are also known for their resilience to extreme environmental conditions and suitable cell growth rates. Beyond the known potential for biofuel production, these microorganisms can still produce other compounds, being lipids, pigments, vitamins, proteins, and polysaccharides, whose applications go from pharmaceutical to agricultural industries. Recently, the research focus has been directed to the biopolymer-producing ability of both micro- and macroalgae, as they can be rather varied and useful to many applications. However, this is still an ongoing research field, and new data are frequently added in the literature, notably on biomass processing, which can be done with the intent of use into dyes, bioplastics, paints, and even as biochar in solid fuel cells. Microalgae-based biopolymers can be used in a wide range of products, nevertheless, the resulting process efficiency and yields depend on the extraction process utilized, as well as on the microalgae species used and the culture conditions. Furthermore, the polymer extraction can be done directly with common solvents at atmospheric pressure or with other fluids, such as supercritical CO2 or subcritical solvents, and assisted by specific treatments, e.g., ultrasound and microwave. The residual biomass can still be used to produce other less valuable products, such as feedstock, and energy via combustion. In this sense, the present work aims to provide a state-of-the-art review on microalgae biopolymers. Issues related to the efficiency of current treatment methods, industrial applications, and environmental performance are presented and discussed. Besides, the perspectives in this area of knowledge are also a contribution of the present work, the extent to which scientific research is still under development.
{"title":"MICROALGAE BIOPOLYMERS: A REVIEW","authors":"Pedro Siqueira Zatta, Beatriz Jacob Furlan, Rafaela Mirabile, Rafael Silva Ribeiro Gonçalves, Paulo Alexandre Silveira da Silva, Dhyogo Miléo Taher, Gilvana Scoculi de Lira, L. Martins, J. Ordóñez, Jose Viriato Coelho Vargas","doi":"10.26678/abcm.encit2022.cit22-0014","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0014","url":null,"abstract":"Algae are ubiquitous organisms whose capabilities have drawn much attention as of late in the bioengineering field due to their potential to enable a wide range of bioproducts. Microalgae are ideal organisms for the application of the biorefinery concept since they can be grown in wastewater and, at the same time, produce many products of commercial interest. These microorganisms are also known for their resilience to extreme environmental conditions and suitable cell growth rates. Beyond the known potential for biofuel production, these microorganisms can still produce other compounds, being lipids, pigments, vitamins, proteins, and polysaccharides, whose applications go from pharmaceutical to agricultural industries. Recently, the research focus has been directed to the biopolymer-producing ability of both micro- and macroalgae, as they can be rather varied and useful to many applications. However, this is still an ongoing research field, and new data are frequently added in the literature, notably on biomass processing, which can be done with the intent of use into dyes, bioplastics, paints, and even as biochar in solid fuel cells. Microalgae-based biopolymers can be used in a wide range of products, nevertheless, the resulting process efficiency and yields depend on the extraction process utilized, as well as on the microalgae species used and the culture conditions. Furthermore, the polymer extraction can be done directly with common solvents at atmospheric pressure or with other fluids, such as supercritical CO2 or subcritical solvents, and assisted by specific treatments, e.g., ultrasound and microwave. The residual biomass can still be used to produce other less valuable products, such as feedstock, and energy via combustion. In this sense, the present work aims to provide a state-of-the-art review on microalgae biopolymers. Issues related to the efficiency of current treatment methods, industrial applications, and environmental performance are presented and discussed. Besides, the perspectives in this area of knowledge are also a contribution of the present work, the extent to which scientific research is still under development.","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121717592","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 : 2023-02-06DOI: 10.26678/abcm.encit2022.cit22-0359
Matheus Ben-Hur Ramirez Sapucaia, Beatriz Jacob Furlan, Rafael Silva Ribeiro Gonçalves, W. Balmant, L. Martins, Jose Viriato Coelho Vargas
In order to reduce oil dependency and reduce CO2 emissions stabilizing the greenhouse effect on the planet, the search for new renewable energy sources has been intensified, with a particular interest in hydrogen based solutions. Hydrogen can be used in fuel cells, which have several applications. Fuel Cells are among the environmentally friendly energy conversion systems for the 21st century with simple components such as membrane, catalyst, rearrangeable configurations that allow them to accommodate space limitations, and their use of hydrogen and oxygen. There are many types of fuel cells that are distinguished by the electrolyte type and their operating temperature. Alkaline Membrane Fuel Cells (AMFCs) and Proton-Exchange Membrane Fuel Cells (PEMFCs) are major types that work in low temperatures and produce only H2O and electricity as part of the electrochemical reaction. AMFC is a fuel cell that has more affordable membranes, when compared to the PEMFC that uses a polymeric membrane with high cost, making applications more expensive. In AMFCs, the alkaline membrane used, is a simple filter paper saturated with KOH solution that allows ions to pass through the membrane, however, suffers CO2 poisoning when it gets in contact to the carbon dioxide present in the air, reacting in the KOH and capturing hydroxyl ions. The poisoning will generate chemical compounds that will interfere with the energy generation and efficiency of the fuel cell. The main cause of the decreasing performance of carbonate formation is the precipitation of large metal carbonate crystals such as K2CO3 and the formation of H2O in the membrane, decreasing KOH concentration. If not addressed, this issue will limit the use of AMFC to pure oxygen applications only, instead of the air itself, which restricts the applicability of the technology. This study presents a mathematical model of a purifier that reduces the concentration of CO2 present in the air, improving conditions to be used in AMFC for mobile applications as automotive vehicles and without the need to use pure oxygen.
{"title":"MATHEMATICAL MODELING AND SIMULATION OF CO2 REMOVAL FROM AN ALKALINE SOLUTION FOR FUEL CELLS APPLICATIONS","authors":"Matheus Ben-Hur Ramirez Sapucaia, Beatriz Jacob Furlan, Rafael Silva Ribeiro Gonçalves, W. Balmant, L. Martins, Jose Viriato Coelho Vargas","doi":"10.26678/abcm.encit2022.cit22-0359","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0359","url":null,"abstract":"In order to reduce oil dependency and reduce CO2 emissions stabilizing the greenhouse effect on the planet, the search for new renewable energy sources has been intensified, with a particular interest in hydrogen based solutions. Hydrogen can be used in fuel cells, which have several applications. Fuel Cells are among the environmentally friendly energy conversion systems for the 21st century with simple components such as membrane, catalyst, rearrangeable configurations that allow them to accommodate space limitations, and their use of hydrogen and oxygen. There are many types of fuel cells that are distinguished by the electrolyte type and their operating temperature. Alkaline Membrane Fuel Cells (AMFCs) and Proton-Exchange Membrane Fuel Cells (PEMFCs) are major types that work in low temperatures and produce only H2O and electricity as part of the electrochemical reaction. AMFC is a fuel cell that has more affordable membranes, when compared to the PEMFC that uses a polymeric membrane with high cost, making applications more expensive. In AMFCs, the alkaline membrane used, is a simple filter paper saturated with KOH solution that allows ions to pass through the membrane, however, suffers CO2 poisoning when it gets in contact to the carbon dioxide present in the air, reacting in the KOH and capturing hydroxyl ions. The poisoning will generate chemical compounds that will interfere with the energy generation and efficiency of the fuel cell. The main cause of the decreasing performance of carbonate formation is the precipitation of large metal carbonate crystals such as K2CO3 and the formation of H2O in the membrane, decreasing KOH concentration. If not addressed, this issue will limit the use of AMFC to pure oxygen applications only, instead of the air itself, which restricts the applicability of the technology. This study presents a mathematical model of a purifier that reduces the concentration of CO2 present in the air, improving conditions to be used in AMFC for mobile applications as automotive vehicles and without the need to use pure oxygen.","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128935767","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 : 2022-01-01DOI: 10.26678/abcm.encit2022.cit22-0422
G. Pinto, Roberto Berlini Rodrigues da Costa, T. D. de Souza, Ana Júlia Antunes Cintra Rosa, O. Raats, Luis Filipe de Almeida Roque, Gustavo Vieira Frez, Beatriz Marques Oliveira, Christian Jeremi R. Coronado
{"title":"Comparative study regarding the use of hydrogen, natural gas and biogas for dual-fuel operation in diesel engines","authors":"G. Pinto, Roberto Berlini Rodrigues da Costa, T. D. de Souza, Ana Júlia Antunes Cintra Rosa, O. Raats, Luis Filipe de Almeida Roque, Gustavo Vieira Frez, Beatriz Marques Oliveira, Christian Jeremi R. Coronado","doi":"10.26678/abcm.encit2022.cit22-0422","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0422","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125775642","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 : 1900-01-01DOI: 10.26678/abcm.encit2022.cit22-0426
Luiz Paulo Borges Miranda, Daniel Dall Onder dos Santos
{"title":"Numerical analysis of the rheological properties effects over the re-start flow","authors":"Luiz Paulo Borges Miranda, Daniel Dall Onder dos Santos","doi":"10.26678/abcm.encit2022.cit22-0426","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0426","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115360940","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 : 1900-01-01DOI: 10.26678/abcm.encit2022.cit22-0269
Marcelo B. Dos Santos, Clayton Fernandes de Souza, L. M. Moura, Rubens Nunes de Faria, Patrick Fernando Silva dos Santos
{"title":"Determination Of Thermal Conductivity In Aerogel, With Or Without The Addition Of Graphene, Using The Hot Wire Method","authors":"Marcelo B. Dos Santos, Clayton Fernandes de Souza, L. M. Moura, Rubens Nunes de Faria, Patrick Fernando Silva dos Santos","doi":"10.26678/abcm.encit2022.cit22-0269","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0269","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117352893","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 : 1900-01-01DOI: 10.26678/abcm.encit2022.cit22-0431
I. Carneiro, Celso Peres Fernandes, F. Bagni, Francisco Hilário Rego Bezerra
{"title":"Study of the impact of microCT image resizing on numerically estimated porosity and permeability results","authors":"I. Carneiro, Celso Peres Fernandes, F. Bagni, Francisco Hilário Rego Bezerra","doi":"10.26678/abcm.encit2022.cit22-0431","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0431","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"105 S112","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120851065","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 : 1900-01-01DOI: 10.26678/abcm.encit2022.cit22-0337
Juliano Fernandes Dias Taveira de Brito, A. Maurente
{"title":"Simulation of a cooling processes of wort using a immersion chiller","authors":"Juliano Fernandes Dias Taveira de Brito, A. Maurente","doi":"10.26678/abcm.encit2022.cit22-0337","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0337","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120946996","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 : 1900-01-01DOI: 10.26678/abcm.encit2022.cit22-0217
Erick Oliveira do Nascimento, Edwin Martin Cárdenas Contreras, Ê. B. Bandarra Filho
{"title":"NUMERICAL EVALUATION OF THE APPLICATION OF MWCNT NANOFLUIDS IN AUTOMOTIVE FLAT TUBE RADIATORS","authors":"Erick Oliveira do Nascimento, Edwin Martin Cárdenas Contreras, Ê. B. Bandarra Filho","doi":"10.26678/abcm.encit2022.cit22-0217","DOIUrl":"https://doi.org/10.26678/abcm.encit2022.cit22-0217","url":null,"abstract":"","PeriodicalId":436403,"journal":{"name":"Procceedings of the 19th Brazilian Congress of Thermal Sciences and Engineering","volume":"61 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121016960","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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