Pub Date : 1900-01-01DOI: 10.5505/fujece.2022.36855
E. Aydoğmuş, F. Kamişli
In this study, biopolyol has been synthesized from corn oil by epoxidation, hydroxylation, neutralization, and purification processes. The rheological properties of both corn oil and polyol obtained from corn oil have been compared. When the variation of viscosity with temperature is examined, it is seen that corn oil-based polyol is more viscous than corn oil. Accordingly, it is thought that the molecular structure of the biopolyol changes, and its molecular weight increases. According to the results obtained, the hydroxyl number of the synthesized polyol is determined as approximately 160 mg KOH/g polyol by the analytical method. The produced polyols have been prepared for polyurethane production after being characterized physically and chemically. The production of polyurethane sponge with a suitable process and method has been realized according to the purpose of use. The approximate density of the produced polyurethane was 40 kg/m and the thermal conductivity coefficient was found to be 0.026 W/m·K. Also, Taguchi method has been used in experimental studies to determine an efficient and economical process in both the polyol synthesis and the polyurethane production.
{"title":"Characterization of polyurethane produced by polyol synthesized from corn oil","authors":"E. Aydoğmuş, F. Kamişli","doi":"10.5505/fujece.2022.36855","DOIUrl":"https://doi.org/10.5505/fujece.2022.36855","url":null,"abstract":"In this study, biopolyol has been synthesized from corn oil by epoxidation, hydroxylation, neutralization, and purification processes. The rheological properties of both corn oil and polyol obtained from corn oil have been compared. When the variation of viscosity with temperature is examined, it is seen that corn oil-based polyol is more viscous than corn oil. Accordingly, it is thought that the molecular structure of the biopolyol changes, and its molecular weight increases. According to the results obtained, the hydroxyl number of the synthesized polyol is determined as approximately 160 mg KOH/g polyol by the analytical method. The produced polyols have been prepared for polyurethane production after being characterized physically and chemically. The production of polyurethane sponge with a suitable process and method has been realized according to the purpose of use. The approximate density of the produced polyurethane was 40 kg/m and the thermal conductivity coefficient was found to be 0.026 W/m·K. Also, Taguchi method has been used in experimental studies to determine an efficient and economical process in both the polyol synthesis and the polyurethane production.","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130416010","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: 10.5505/fujece.2022.76486
Halil İbrahim Yamaç, A. Koca, Taner Yilmaz
{"title":"Using computational fluid dynamics for wave generation and evaluation of results in numerical wave tank modelling","authors":"Halil İbrahim Yamaç, A. Koca, Taner Yilmaz","doi":"10.5505/fujece.2022.76486","DOIUrl":"https://doi.org/10.5505/fujece.2022.76486","url":null,"abstract":"","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114171253","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: 10.5505/fujece.2022.18209
Banu Taşkan
Membrane-less microbial fuel cell (MLMFC) is one of the most promising technologies for energy generation from organic wastes. The use of biocathode in the MLMFC system reduces the operation cost and provides many benefits. In an algal MLMFC system, the photosynthetic microorganism facilitates the oxygen reduction in the cathode chamber and improves overall cell performance. However, the assessment of the long-term stability of biocathode is a primary concern. In the current study, the electricity generation performance of algal MLMFC using mixed-algae as a biocathode was investigated. The results showed that the electricity generation of algal MLMFC increased during the light cycle because of the photosynthesis of algal cells in the cathode. During the light cycle, the maximum power density and lowest cathode charge transfer resistance of algal MLMFC were 215.71 mW/m and 29.73 Ω, respectively. The electrochemical analysis demonstrated that the anode biofilm of algal MLMFC has high bioelectrogenic activity. This study plays a crucial role in determining the applicability of this technology.
{"title":"The use of mixed algae species as biocathode in membrane-less microbial fuel cell","authors":"Banu Taşkan","doi":"10.5505/fujece.2022.18209","DOIUrl":"https://doi.org/10.5505/fujece.2022.18209","url":null,"abstract":"Membrane-less microbial fuel cell (MLMFC) is one of the most promising technologies for energy generation from organic wastes. The use of biocathode in the MLMFC system reduces the operation cost and provides many benefits. In an algal MLMFC system, the photosynthetic microorganism facilitates the oxygen reduction in the cathode chamber and improves overall cell performance. However, the assessment of the long-term stability of biocathode is a primary concern. In the current study, the electricity generation performance of algal MLMFC using mixed-algae as a biocathode was investigated. The results showed that the electricity generation of algal MLMFC increased during the light cycle because of the photosynthesis of algal cells in the cathode. During the light cycle, the maximum power density and lowest cathode charge transfer resistance of algal MLMFC were 215.71 mW/m and 29.73 Ω, respectively. The electrochemical analysis demonstrated that the anode biofilm of algal MLMFC has high bioelectrogenic activity. This study plays a crucial role in determining the applicability of this technology.","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128359785","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: 10.5505/fujece.2023.36844
K. Demir, B. Ari, Fatih Demir
{"title":"Detection of brain tumor with a pre-trained deep learning model based on feature selection using MR images","authors":"K. Demir, B. Ari, Fatih Demir","doi":"10.5505/fujece.2023.36844","DOIUrl":"https://doi.org/10.5505/fujece.2023.36844","url":null,"abstract":"","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128231900","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: 10.5505/fujece.2022.77487
I. Erhunmwun, Saliu Idaomi Hammed, P. Amiolemhen
The flow regime is identified as a steady-state flow if the pressure at every location in the reservoir remains constant. In this work, we have determined the well production rate and cumulative production in a circular reservoir using the Finite Element Method for the condition of constant pressure outer boundary. The reservoir was divided into 4 smaller part known as finite element. These parts were analyzed and later assembled to form the domain of the reservoir. The analysis was done with the assumption that before the well begins production, there was uniform distribution of pressure all through the reservoir. The results obtained from the production rate analysis shows that the dimensionless production rate decreases significantly and later becomes uniform because the withdrawn fluid has been completely replaced. This condition remains throughout the entire life of the reservoir presumably. Also, the result shows that there is a uniform increase in the dimensionless cumulative production as time increases. The result obtained in this work was compared with the results obtained by previous researcher. The comparison shows a strong positive correlation between the two methods with a maximum percentage error of 0.1711 and 0.1864 and a minimum percentage error of 0.0001 and 0.0122 for dimensionless production rate and dimensionless cumulative production respectively. Also, result from previous researcher only state the production rate and cumulative production of the reservoir at a particular time but this work predicts the production rate and cumulative production in the entire reservoir at the same time.
{"title":"Numerical determination of the production rate and cumulative production in the constant pressure outer boundary condition","authors":"I. Erhunmwun, Saliu Idaomi Hammed, P. Amiolemhen","doi":"10.5505/fujece.2022.77487","DOIUrl":"https://doi.org/10.5505/fujece.2022.77487","url":null,"abstract":"The flow regime is identified as a steady-state flow if the pressure at every location in the reservoir remains constant. In this work, we have determined the well production rate and cumulative production in a circular reservoir using the Finite Element Method for the condition of constant pressure outer boundary. The reservoir was divided into 4 smaller part known as finite element. These parts were analyzed and later assembled to form the domain of the reservoir. The analysis was done with the assumption that before the well begins production, there was uniform distribution of pressure all through the reservoir. The results obtained from the production rate analysis shows that the dimensionless production rate decreases significantly and later becomes uniform because the withdrawn fluid has been completely replaced. This condition remains throughout the entire life of the reservoir presumably. Also, the result shows that there is a uniform increase in the dimensionless cumulative production as time increases. The result obtained in this work was compared with the results obtained by previous researcher. The comparison shows a strong positive correlation between the two methods with a maximum percentage error of 0.1711 and 0.1864 and a minimum percentage error of 0.0001 and 0.0122 for dimensionless production rate and dimensionless cumulative production respectively. Also, result from previous researcher only state the production rate and cumulative production of the reservoir at a particular time but this work predicts the production rate and cumulative production in the entire reservoir at the same time.","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117068642","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: 10.5505/fujece.2022.43153
Ebru Kavak Akpinar, M. Das
{"title":"Modeling of a solar air collector heat transfer coefficient with regression algorithms","authors":"Ebru Kavak Akpinar, M. Das","doi":"10.5505/fujece.2022.43153","DOIUrl":"https://doi.org/10.5505/fujece.2022.43153","url":null,"abstract":"","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121618629","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: 10.5505/fujece.2022.32042
B. Yilmaz, M. Gençoglu
{"title":"Modeling the limiting performance of resistive superconductor fault current limiters for 2G HTS tape","authors":"B. Yilmaz, M. Gençoglu","doi":"10.5505/fujece.2022.32042","DOIUrl":"https://doi.org/10.5505/fujece.2022.32042","url":null,"abstract":"","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134380132","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: 10.5505/fujece.2023.79553
A. Özdemir, Bahadir Yilmaz
{"title":"Investigation of flow properties and activation energy of magnesium lignosulfonate modified bitumen","authors":"A. Özdemir, Bahadir Yilmaz","doi":"10.5505/fujece.2023.79553","DOIUrl":"https://doi.org/10.5505/fujece.2023.79553","url":null,"abstract":"","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126327571","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: 10.5505/fujece.2023.69885
Canan Koç, Fatih Özyurt
{"title":"An examination of synthetic images produced with DCGAN according to the size of data and epoch","authors":"Canan Koç, Fatih Özyurt","doi":"10.5505/fujece.2023.69885","DOIUrl":"https://doi.org/10.5505/fujece.2023.69885","url":null,"abstract":"","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114066921","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: 10.5505/fujece.2022.35744
Mustafa Kanik
In this study, the slope stability problem, which occurred when the projected excavation works of a treatment plant has been started, has been examined. The aim of this study is to determine the conditions causing the slope failure and to make the slope stable again. Then, to ensure the stability of the whole slope after all the excavations work in the project area have been completed. For this purpose, firstly, the topographic features of the slope where the failure took place were determined and a model of the failure condition was created. Field and laboratory studies were used to obtain the data to be used in slope modeling. Models reflecting the current situation were analyzed considering static and dynamic conditions and a safe slope design was created. The analyzes are carried out by Slide V.6.0. software which is based on limit equilibrium methods and Bishop Method was preferred. As a result, it was determined that the reason of the failure occurred was the change of the soil’s physical and mechanical parameters due to precipitation. In the slope stability problem considered, the benching method has been proposed as an improvement method, and additionally, suggestions have been made for the disposal of surface waters by drainage methods.
{"title":"Failure mechanism of a soil slope and stabilization method: a case study","authors":"Mustafa Kanik","doi":"10.5505/fujece.2022.35744","DOIUrl":"https://doi.org/10.5505/fujece.2022.35744","url":null,"abstract":"In this study, the slope stability problem, which occurred when the projected excavation works of a treatment plant has been started, has been examined. The aim of this study is to determine the conditions causing the slope failure and to make the slope stable again. Then, to ensure the stability of the whole slope after all the excavations work in the project area have been completed. For this purpose, firstly, the topographic features of the slope where the failure took place were determined and a model of the failure condition was created. Field and laboratory studies were used to obtain the data to be used in slope modeling. Models reflecting the current situation were analyzed considering static and dynamic conditions and a safe slope design was created. The analyzes are carried out by Slide V.6.0. software which is based on limit equilibrium methods and Bishop Method was preferred. As a result, it was determined that the reason of the failure occurred was the change of the soil’s physical and mechanical parameters due to precipitation. In the slope stability problem considered, the benching method has been proposed as an improvement method, and additionally, suggestions have been made for the disposal of surface waters by drainage methods.","PeriodicalId":309580,"journal":{"name":"FIRAT UNIVERSITY JOURNAL OF EXPERIMENTAL AND COMPUTATIONAL ENGINEERING","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131491746","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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