Basrah journal for engineering science最新文献_第3页

Effect of Biopipe Total Flowrate on Venturi Aerator Performance bioppipe总流量对文丘里曝气器性能的影响

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.1

H. Jasem, Kifah Khudair

引用次数: 0

Effect of Hexagonal Boron Nitride Nanoparticles Additions on Corrosion Resistance for Zinc Coatings of Weathering Steel in Rainwater 六方氮化硼纳米颗粒对耐候钢锌涂层耐雨水腐蚀性能的影响

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.9

Dhurgham Mohsin, H. Lieth, M. Jabbar

{"title":"Effect of Hexagonal Boron Nitride Nanoparticles Additions on Corrosion Resistance for Zinc Coatings of Weathering Steel in Rainwater","authors":"Dhurgham Mohsin, H. Lieth, M. Jabbar","doi":"10.33971/bjes.23.1.9","DOIUrl":"https://doi.org/10.33971/bjes.23.1.9","url":null,"abstract":"Zinc and its alloy coatings are commonly used to provide cathodic protection for weathering steel. However, the steel substrate corrodes faster than the Zinc coating because of the coating's negative corrosion potential. Many studies have examined Zinc and alloy coatings' resistance to corrosion. Hot-dip galvanizing, Electrodeposition, and Zinc-rich coat (ZRC) spray are just some of the methods that can be used to deposit such coatings. Commercially available 99.95 % pure Zinc oxide was used in the electroplating process in this investigation. Steel samples were plated in Zinc sulphate and Zinc oxide solutions and were controlled by different bath parameters such as voltage, current, pH, temperature, and coating time. The addition of hexagonal Boron Nitride (h-BN) nanoparticles has also shown significant improvements in corrosion resistance. However, Zinc-based coating techniques reinforced with h-BN incorporation show the best corrosion current density (Icorr) of Hot dip 2 % wt. (2.1 μA/cm2), ZRC 2.5 % wt., (4.4 μA/cm2), and electroplating 15.75 g/L (0.081 μA/cm2), which is an order of magnitude lower than coatings without h-BNs. The corrosion rates and current densities of Zn/h-BN coated layers were investigated in a controlled laboratory environment that mimicked natural conditions (Rainwater solution) by extrapolating polarization curves.","PeriodicalId":150774,"journal":{"name":"Basrah journal for engineering science","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130872865","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: 1

Comparison Between Numerical and an Experimental Results of Pressure Drop in a Perforated Horizontal Wellbore with a 90° Perforations Phasing 90°射孔分段射孔水平井筒压降数值与实验结果比较

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.15

M. Mustafa, Q. Rishack, M. Abdulwahid

{"title":"Comparison Between Numerical and an Experimental Results of Pressure Drop in a Perforated Horizontal Wellbore with a 90° Perforations Phasing","authors":"M. Mustafa, Q. Rishack, M. Abdulwahid","doi":"10.33971/bjes.23.1.15","DOIUrl":"https://doi.org/10.33971/bjes.23.1.15","url":null,"abstract":"This paper presented experimental and numerical studies to investigate pressure drop in perforation horizontal wellbore with a 90° phasing and 20 spm perforation density. The experimental apparatus has been constructed to calculate the static pressure drop and calculate the exit velocity in the horizontal pipe after mixing the axial flow with the radial flow through the perforations in the wellbore. The specifications of the wellbore used were the inner diameter is 44 mm, length is 2 m, and perforation diameter is 4 mm. For this objective, a simulation model was created in the wellbore using the ANSYS Fluent simulation software by using the standard k-ε model and applied to the (CFD) by changing the axial flow from (40-160) lit/min and constant inflow through perforations from range (0 - 80) lit/min. According to the study's findings, the increase in the radial flow through the perforations increases the total flow rate ratio and the total pressure drop and vice versa. In addition, an increase in the axial flow mixed with radial flow increases the total pressure drop, friction factor, and a decrease in productivity index. Furthermore, the percentage error of the total pressure drop between the numerical and experimental results in test 4 is about 3.83 %. It was found that the numerical and experimental results represented a good agreement about the study of the flow-through perforations at 90° angle in terms of pressure drop and productivity index, etc.","PeriodicalId":150774,"journal":{"name":"Basrah journal for engineering science","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115382376","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

Improving of the Subgrade Soil using Chemical Additives 化学添加剂对路基土的改良

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.2

Abbas A. Khudhair, H. Shaia, H. Aodah

引用次数: 0

Strength Characteristics of Clay Soil Reinforced with Natural Fibers 天然纤维增强粘土的强度特性

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.6

M. Abood, R. R. Shakir

{"title":"Strength Characteristics of Clay Soil Reinforced with Natural Fibers","authors":"M. Abood, R. R. Shakir","doi":"10.33971/bjes.23.1.6","DOIUrl":"https://doi.org/10.33971/bjes.23.1.6","url":null,"abstract":"The trend of using natural fibers in geotechnical engineering has become of great interest to improve weak soils due to some of its advantages such as local availability, environmental friendliness, and lower cost. In this study, a set of unconfined compression strength and direct shear tests were conducted to evaluate the performance of Al-Nasiriya clayey soil reinforced with natural fibers. Three different types of natural fibers were investigated as sustainable ones, including wheat straw fiber and palm frond fiber, as well as imperata cylindrica fiber. The effects of various fiber contents (0.25 %, 0.5 %, 0.75 %, and 1 %) and lengths (20 mm, 30 mm, and 40 mm) were experimentally evaluated. The results indicated that the compressive strength increased significantly with the increase of fiber content and length up to an optimum value and then decreased. The optimum fiber content and length were 0.5 % and 30 mm, respectively. Compared to the unreinforced soil, the compressive strength values at the optimum content and length increased by 102 %, 126 %, and 66 % for samples reinforced with wheat straw, palm fronds, and imperata cylindrica fibers, respectively. The shear properties improved due to soil reinforcement with natural fibers. Compared to the unreinforced soil, the internal friction angle of the samples reinforced with wheat straw, palm fronds, and imperata cylindrica fibers increased by 17.7 %, 42 %, and 9 %, respectively. Forever, the cohesion and shear strength are also improved due to inclusion of natural fibers.","PeriodicalId":150774,"journal":{"name":"Basrah journal for engineering science","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128746778","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

Experimental and Numerical Study the Linear Stress Analyses for the Prediction of Fracture Toughness of Ductile Material 用于预测韧性材料断裂韧性的线性应力分析的实验和数值研究

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.14

Sara H. Khudair, Atheed Taha, A. Nassar

{"title":"Experimental and Numerical Study the Linear Stress Analyses for the Prediction of Fracture Toughness of Ductile Material","authors":"Sara H. Khudair, Atheed Taha, A. Nassar","doi":"10.33971/bjes.23.1.14","DOIUrl":"https://doi.org/10.33971/bjes.23.1.14","url":null,"abstract":"The purpose of this paper is to determine a stress intensity factor experimental and numerically in the linear region by using a CT specimen of ductile material with a thickness of 15 mm, a width of 30 mm, and pre-crack 1.3 mm this dimension according to ASTM-E399-12 [1], by pulling the specimen in a 600 kN universal testing machine at a very slow speed rate of 0.5 mm/min. The load is applied until the fracture is accrued, the computer-controlled universal testing machine gives the value of the load and the displacement transducer gives a crack mouth opening displacement. The result showed experimental KI is equal to 75.412 MPa√m, and numerical KI is equal to74.576 MPa√m, this test showed a very slight decrease in FEA stress intensity factor compared to that in an experimental result which means the stress intensity factor, KI remains very close between experimental and numerical with an error percentage of about (1.12 %). The finite element analysis provides the best approximation to true fracture toughness values, and it can be used to acquire close parameters if experimental testing is not possible.","PeriodicalId":150774,"journal":{"name":"Basrah journal for engineering science","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129657036","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

An Experimental Study of Natural Convection Heat Transfer from a Horizontal and Slightly Inclined Plate-Fin Heat Sink 水平微倾斜板翅式散热器自然对流换热实验研究

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.13

Almustafa Khalaf, H. Sultan, F. Abood

引用次数: 0

Structural Behavior of Reinforced Concrete Hollow Core Slabs Cast with Self-Compacting Concrete Containing Recycled Concrete as Coarse Aggregate 含再生混凝土粗骨料自密实混凝土浇筑钢筋混凝土空心芯板的结构性能

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.4

M. Hassan, Jamal Khudhair

{"title":"Structural Behavior of Reinforced Concrete Hollow Core Slabs Cast with Self-Compacting Concrete Containing Recycled Concrete as Coarse Aggregate","authors":"M. Hassan, Jamal Khudhair","doi":"10.33971/bjes.23.1.4","DOIUrl":"https://doi.org/10.33971/bjes.23.1.4","url":null,"abstract":"This paper investigates the possibility of recycled aggregate use in concrete slabs with hollow cores. The main variables considered in the experimental study for the slabs were the recycled aggregate percentage and the hollow core number. Six slabs with dimensions of (1000 × 500 × 120) mm was fabricated and tested. The results showed that the addition of recycled aggregate in the concrete slabs affected the ultimate strength, ductility, and energy absorption of the concrete members. An increase of the recycled aggregate percentage to 25 % decreased the ultimate strength capacity by 3.54 %, but the increase of recycled aggregate to 50 % led to a decrease in the ultimate strength of about 6.64%. The existence of a hollow core reduced the cracking and ultimate load capacity of the RCA slabs, and this reduction was according to the core number which the fabrication of more cores caused more decrement. The ductility and energy absorption were decreased when the replacement ratio of the recycled aggregate increased. Also, the core number affected the ductility and energy absorption. The energy absorption was the most property affected by the core number increase which caused an average reduction of 71.5 % when the core number increased from two to three hollow cores.","PeriodicalId":150774,"journal":{"name":"Basrah journal for engineering science","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133990729","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

Simulation of Interaction Between Groundwater and Surface Water in Safwan-Zubair Area, South of Iraq 伊拉克南部Safwan-Zubair地区地下水与地表水相互作用的模拟

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.7

Maher Mnati, A. Al-Aboodi, Ayman A. Hassan

{"title":"Simulation of Interaction Between Groundwater and Surface Water in Safwan-Zubair Area, South of Iraq","authors":"Maher Mnati, A. Al-Aboodi, Ayman A. Hassan","doi":"10.33971/bjes.23.1.7","DOIUrl":"https://doi.org/10.33971/bjes.23.1.7","url":null,"abstract":"Groundwater in arid and semi-arid regions, such as the studied area (Safwan Al-Zubair area, south of Iraq), is of specific meaning as a major source for domestic use and irrigation demand. There is a need to better understand the interactions between groundwater and surface water (Shatt Al-Basrah Canal). These interactions can negatively affect the quality of groundwater in this area, especially that the water of Shatt Al-Basrah Canal contains highly concentrated pollutants. The aim of the study is to investigate the temporal disparity of river-aquifer interactions and count the amount of river interchange among canal and aquifer. In this research, a new concept of paradigm will be advanced utilizing RIVER package of Groundwater River Paradigm (MODFLOW) for the simulation of river-aquifer interaction operations. Six monitoring wells are chosen to evaluate the preliminary and historical groundwater hydraulic heads for six months and then use all collected data in Modflow to execute the simulation of numerical modeling to assessment the interaction between surface water and groundwater. The amount of seepage out from the canal towards the aquifer was (64.99 m3/day) in wet season (winter season), as a result of the high levels of the surface water compared to the hydraulic heads of groundwater. The amount of seepage in dry season towards the aquifer is equal to (336.8 m3/day).","PeriodicalId":150774,"journal":{"name":"Basrah journal for engineering science","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124866544","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

Numerical Simulation of the Aerodynamic Characteristics of NACA0012 Airfoil Based on Operational Parameters 基于工作参数的NACA0012翼型气动特性数值模拟

Basrah journal for engineering science Pub Date : 2023-07-02 DOI: 10.33971/bjes.23.1.11

Ayat Mula, M. Abdulwahid

引用次数: 0