Diyala Journal of Engineering Sciences最新文献_第4页

Accessibility and Connectivity for Enhancement the Integrative Conservation of the Historic Urban Fabric of Mosul Old City 可达性和连通性加强摩苏尔老城历史城市结构的综合保护

Diyala Journal of Engineering Sciences Pub Date : 2023-04-16 DOI: 10.24237/djes.2023.16206

Ammar Abdullah Hamad, E. Ismaeel

引用次数: 0

Influence of Voltage on Pore Water Pressure for Soft Soil Treated with Electro-Osmosis Technique 电压对电渗透处理软土孔隙水压力的影响

Diyala Journal of Engineering Sciences Pub Date : 2023-04-15 DOI: 10.24237/djes.2023.16208

Ansam M. Wahhab, Qasim A. Aljanabi

{"title":"Influence of Voltage on Pore Water Pressure for Soft Soil Treated with Electro-Osmosis Technique","authors":"Ansam M. Wahhab, Qasim A. Aljanabi","doi":"10.24237/djes.2023.16208","DOIUrl":"https://doi.org/10.24237/djes.2023.16208","url":null,"abstract":"Geotechnical engineers have a difficult time working with soft soils because they take so long to reach their final settlement and drain water under pressure. Granular columns and other modern technology are just two of the many methods utilized to hasten this leveling. In this study, the alteration of clay soils with a granular column and the evacuation of water by an electric field were replicated using 2D engineering and a finite component. solid mechanics and electrical interfaces are built using the drag interface. Mohr-Coulomb relied on a granular column and fine clay soil at the mechanical contact and employed electro-osmosis to describe the model's electric field's impact. For a period of six months, the pore water pressure for the fine clay soil was calculated. The result showed that when the electric current is applied with a voltage (5 v) the pwp in soil increases in first two months and then begins to gradually decrease, reaching in sixth month (120 kPa) and when applied voltage increases (15 v) the pwp decrease in the first two months from the previous ratio of voltage then it begins to gradually decrease and reaches in sixth month (70 kPa), When applied voltage increases more (30 v) the pwp in the soil decreases in first two months from the previous ratios of voltages, then it begins to gradually decrease and reaches (40 kPa), The percentage of water leaving the soil when an electric current is applied from (5-15 v) was (64%) and when voltage increased to (15-30 v) became (75%) which means the applied voltage increases, cause more water is discharged from the soil. The soil settlement also increases with an increase in the voltage, as the improvement percentage and the water exit from the soil (50%) at (5-15 v) and (71%) at (15-30 v).","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124079997","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

Study the Effect of Adding Heat Exchanger on the Refrigeration System Performance 研究增设换热器对制冷系统性能的影响

Diyala Journal of Engineering Sciences Pub Date : 2023-04-15 DOI: 10.24237/djes.2023.16201

Maytham Neamah Jasim, Yaser Alaiwi

{"title":"Study the Effect of Adding Heat Exchanger on the Refrigeration System Performance","authors":"Maytham Neamah Jasim, Yaser Alaiwi","doi":"10.24237/djes.2023.16201","DOIUrl":"https://doi.org/10.24237/djes.2023.16201","url":null,"abstract":"Internal, or liquid-suction, heat exchangers are used with the primary goal of ensuring the entry of refrigerant in the liquid phase to the expansion device. The greatest COP gain is primarily determined by the thermodynamic parameters linked to the relative increase in refrigerating effect. Large latent heat of vaporization refrigerants often does not gain as much from condenser subcooling in support of a cooling system. Computational fluid dynamics (CFD) is used to study the effects of the turbulence model, which requires the solution of two transport equations. A technique was developed to study the thermal effect on the heat exchange process between two fluids. To observe the temperature effect on 17 tubes, the diameter was altered twice, first to 6 mm and then to 4 mm. The flow procedure happened in one direction, and the tube that contains the tubes had a diameter of 50 mm. The best-case scenario is the case where the pipe diameter is 4 mm and the heat exchanger are 300 mm in length. Through the results, the enthalpy was improved in the simulated cases to 423.2 h [KJ/M]. The length of the heat exchanger greatly affects the values of the exit temperatures and the temperature difference. For a length of 225 mm, the temperature reached 15.73 °C, and for 300 mm, it reached 13.847 °C. The significant reduction in temperatures helps increase the coefficient in the refrigeration cycle. A high coefficient of cooling in the heat exchanger appears when the length is 300 mm compared to other lengths.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122143235","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

Predicting of Seismic Performance on Tunnel in Weak Soil 软弱地基隧道抗震性能预测

Diyala Journal of Engineering Sciences Pub Date : 2023-04-14 DOI: 10.24237/djes.2023.16202

Nuha J. Najm, Waad A. Zakaria

{"title":"Predicting of Seismic Performance on Tunnel in Weak Soil","authors":"Nuha J. Najm, Waad A. Zakaria","doi":"10.24237/djes.2023.16202","DOIUrl":"https://doi.org/10.24237/djes.2023.16202","url":null,"abstract":"Main seismic situations have appeared that the tunnels in weak soil may be suffer large seismic damage. Suitable modeling can have great significance for predicting and estimating their seismic acting. This paper examines the effect of the tunneling process and the seismic effect on the tunnel model and the surrounding soil on it. The data of this research is from Almafraq overhead intersection project in the Diyala government, the soil consists of clay and sand layers in which the tunnel is set up. The data obtained from field and laboratory investigations of soil layers and the analysis of the tunneling model by three-dimensional finite element analyses using PLAXIS 3D (V 20), the Mohr-Coulomb (MC) model is employed to demonstrate the behavior of soil-structure interaction in a soil tunnel. Plastic counting was used to act as an elastic-plastic distortion. Three sections are chosen in the vertical direction to experiment with the tunnel's impact and seismic effect on nearby soils. From proceeding FE analysis, the results of calculation by math measurement appeared to main variations in stresses that happen in soils zones nearby the tunnel edges and below the tunnel essentially affect nearness to soils. The increasing pressure becomes smaller as much as you went away horizontally from the tunnel and start to decrease for lengths more than 15m from the tunnel edge's, so it was observed that the most probable safe distance (2D) from the tunnel, which D represents the diameter of the tunnel, this for tunneling. Also, the upper zone of the tunnel considers safer at 58% because it is far from the influence of the earthquake and its soil is clay, while the critical zone locates in contact with the tunnel. Furthermore, it was noted that the amount of settlement of the soil is so little in a phase of tunnelling compared to the dynamic rate of 86%.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129518731","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

Performance Comparison between RSA and El-Gamal Algorithms for Speech Data Encryption and Decryption RSA和El-Gamal算法在语音数据加解密中的性能比较

Diyala Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.24237/djes.2023.16112

Sura F. Yousif

{"title":"Performance Comparison between RSA and El-Gamal Algorithms for Speech Data Encryption and Decryption","authors":"Sura F. Yousif","doi":"10.24237/djes.2023.16112","DOIUrl":"https://doi.org/10.24237/djes.2023.16112","url":null,"abstract":"This article presents a performance comparison of two known public key cryptography techniques namely RSA (Rivest–Shamir–Adleman) and El-Gamal algorithms to encrypt/decrypt the speech signals during transferring over open networks. Specifically, this work is divided into two stages. The first stage is enciphering-deciphering the input speech file by employing the RSA method. The second stage is enciphering-deciphering the same input speech file by employing the El-Gamal method. Then, a comparative analysis is performed to test the performance of both cryptosystems using diverse experimental and statistical analyses for the ciphering and deciphering procedures like some known speech quality measures: histogram, spectrogram, correlation, differential, speed performance and noise effect analyses. The analyses outcomes reveal that the RSA and El-Gamal approaches are efficient and adequate for providing high degree of security, confidentiality and reliability. Additionally, the outcomes indicate that the RSA speech cryptosystem outperforms its counterpart the El-Gamal speech cryptosystem in most of ciphering/deciphering speech performance metrics.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132424740","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: 2

Mathematical Modeling of the Solubility of Carbon Dioxide in Deep Eutectic Solvents 二氧化碳在深共晶溶剂中溶解度的数学模型

Diyala Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.24237/djes.2023.16106

Shahla Z. Ahmad, Arkan J. Hadi, Shagull M. Ali

{"title":"Mathematical Modeling of the Solubility of Carbon Dioxide in Deep Eutectic Solvents","authors":"Shahla Z. Ahmad, Arkan J. Hadi, Shagull M. Ali","doi":"10.24237/djes.2023.16106","DOIUrl":"https://doi.org/10.24237/djes.2023.16106","url":null,"abstract":"The increase in energy consumption, along with an increase in human population and industrial activities after the industrial revolution, has caused to increase in the consumption of fossil fuels. Carbon dioxide from fossil fuels has the most significant effect on the production of greenhouse gases and global warming. The absorption of CO2 emitted into the atmosphere is the most crucial method to reduce carbon dioxide in the air. Recently, a new solvent has been developed to absorb greenhouse gases under the name of deep eutectic solvents (DES). These solvents are biodegradable, non-toxic, or low-toxic compounds that are easily obtained. A mathematical model based on the Peng–Robinson (PR) equation of state (EOS) with three different mixing rules Modified van der Waal's (M1), Quadratic (M2) and Wong Sandler (M3) was developed to correlate the CO2 solubility in six types of DESs. The model was validated and compare with the obtained experimental data reported in the literature at temperatures (293.15 – 333.15) K and pressure (0.405 – 30.408) bar. The experimental and calculated data of PR EOS with three mixing rules were generally in a good agreement by obtaining % AARD a round (0.08 – 8.08), (0.05 – 7.58) and (0.09 – 6.56) for M1, M2 and M3 respectively, and the best results with less %AARD was obtained from Wong-Sandler mixing rule in the most of cases.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124425846","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 the Efficiency of a Conventional Vapor-Compression Refrigeration System used for Geothermal and Evaporative Cooling Techniques: Case Study in Iraq 提高用于地热和蒸发冷却技术的传统蒸汽压缩制冷系统的效率:伊拉克案例研究

Diyala Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.24237/djes.2023.16102

Mays Alaa Ismael, Samir Gh. Yahya, Md. Azhar, I. Mahbubul, Olusegun M. Ilori

{"title":"Improving the Efficiency of a Conventional Vapor-Compression Refrigeration System used for Geothermal and Evaporative Cooling Techniques: Case Study in Iraq","authors":"Mays Alaa Ismael, Samir Gh. Yahya, Md. Azhar, I. Mahbubul, Olusegun M. Ilori","doi":"10.24237/djes.2023.16102","DOIUrl":"https://doi.org/10.24237/djes.2023.16102","url":null,"abstract":"A conventional vapor compression refrigeration cycle is among the most effective technology in refrigeration systems. In the present experimental study, thermal performance and the effect of the condenser temperature have been analyzed. With the decrease in the condenser temperature, the overall performance of the refrigeration cycle is increased. However, the cooling power and efficiency of conventional vapor pressure air conditioning units can experience a significant reduction when operating in extreme weather (hot and dry). This drop is mainly affected by the increase in the temperature (and pressure) of the condenser with an increase in the ambient air temperature. Unfortunately, Iraq experiences the most extreme summer seasons especially in the months of June and July when the temperature reaches or exceeds 50° C. So, ground cooling has been used in areas with a hot environment for split system air conditioners. Evaporative cooling was also performed to lower the coolant temperature of the AC unit used inside the condenser area. Experimental results showed that when using a geothermal heat exchanger, the temperature of the condenser is reduced from 116 to 110 ° C and the coefficient of performance (COP) is improved by 41%. In addition to this when the system uses evaporative cooling the temperature of the condenser is reduced from 110 ° C to 88° C. Moreover, a 65% improvement was made in the COP of the conventional vapor compression refrigeration cycle. Furthermore, with a decrease in the evaporator temperature from 6 to 3.5 °C there was an increase in refrigeration capacity by an average of 52%.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129053041","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

Rehabilitation of Shear damaged Reinforced Concrete Beams with U-Wrapped Carbon Fiber Reinforced Polymer Sheets: Experimental study u包碳纤维增强聚合物板修复受剪损伤钢筋混凝土梁的试验研究

Diyala Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.24237/djes.2023.16104

Aisha Nabeel Abdulazeez, Abdulkhalik J. Abdulridha

{"title":"Rehabilitation of Shear damaged Reinforced Concrete Beams with U-Wrapped Carbon Fiber Reinforced Polymer Sheets: Experimental study","authors":"Aisha Nabeel Abdulazeez, Abdulkhalik J. Abdulridha","doi":"10.24237/djes.2023.16104","DOIUrl":"https://doi.org/10.24237/djes.2023.16104","url":null,"abstract":"This paper presented an experimental study of external rehabilitation of damaged Reinforced Concrete (RC) Beams with Carbon Fibre Reinforced Polymer (CFRP) sheets. The primary objective is to study the shear behavior of four simply supported beam specimens with an total length of 1700mm, a width of 150 mm, and a depth of 250 mm was tested under a monotonic two-point load. The variable used in this study was the specimen damage ratio (50%, 60%, and 70%), while the layout of CFRP sheets and shear-span to effective depth ratio (a/d = 2.5) were kept constant. The design of the examined beams was according to ACI 318M-19 to ensure shear failure. From this study, it was concluded that external rehabilitation with U-shape CFRP sheets offered a very adequate and efficient rehabilitation method for damaged RC beams. Each beam's behavior was examined concerning the crack pattern, first crack load, load-deflection and ultimate load. The CFRP rehabilitation has improved the ultimate load capacity of damaged beams by about 10.91% to 15.96% compared with the expected remaining ultimate load capacity of control specimens without rehabilitation, as well as an increment in the deflection of mid-span from -6.81%, 24.11% at an ultimate load.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"34 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133204419","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

A Survey on Using BIM to Enhance Economic Sustainability in Artistic and Cultural Projects 利用BIM提高文化艺术项目经济可持续性的调查

Diyala Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.24237/djes.2023.16109

N. Mahmood, Wadhah A. Hatem

{"title":"A Survey on Using BIM to Enhance Economic Sustainability in Artistic and Cultural Projects","authors":"N. Mahmood, Wadhah A. Hatem","doi":"10.24237/djes.2023.16109","DOIUrl":"https://doi.org/10.24237/djes.2023.16109","url":null,"abstract":"Artistic and cultural buildings play a vital role in protecting national and cultural identity. Therefore, the necessity of adopting modern technologies when constructing and maintaining such buildings has become a necessity, especially with the continued growth of the construction industry and a move towards sustainable construction. Building Information Modelling (BIM) is a technology used to simplify and improve business performance in the construction industry while saving time and money. This paper aims to find the justifications for conducting research on the importance of using BIM to promote a sustainable economy in Iraqi artistic and cultural projects. This paper was conducted through literature reviews and field surveys of experts in such buildings. The results showed that there is a weak government effort to implement BIM and the owner does not request the use of BIM in the design and implementation of projects. In addition, BIM can also contribute to the efficient use of natural and industrial resources while reducing attrition and waste and improving energy efficiency by reducing energy consumption and using renewable energy. Accordingly, the researcher recommended the importance of conducting research on the importance of using BIM when creating artistic and cultural projects, in addition to the necessity of educating future generations about the concepts of sustainability and sustainable economy on a larger scale and the necessity of using biotechnology that preserves the environment and natural resources, as well as the necessity of educating the concerned authorities on how to do that.","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129251790","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

Behavior of Pile Group Constructed on Clayey Soil under El-Centro Seismic 地震作用下粘性土群桩的性能研究

Diyala Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.24237/djes.2023.16105

Afnan H. Ali, Hassan O. Abbas, Safa H. Abd, Muftah Mohamed Sreh

{"title":"Behavior of Pile Group Constructed on Clayey Soil under El-Centro Seismic","authors":"Afnan H. Ali, Hassan O. Abbas, Safa H. Abd, Muftah Mohamed Sreh","doi":"10.24237/djes.2023.16105","DOIUrl":"https://doi.org/10.24237/djes.2023.16105","url":null,"abstract":"Over the past decades, pile foundations used to support buildings through a transfer of superstructure loads into more stable soil strata than surface soil layers. Buildings are exposed to seismic force, pile undergoes more stress through the significant vibration of the surrounding soil in addition to the static stresses of buildings. The investigation of the behavior of pile foundations under the influence of earthquakes is still limited or not well described. Further, this paper presents a theoretical study to evaluate the vertical settlement and horizontal displacement of piles embedded in clay and silty soil of Baqubah soil under the effect of the acceleration time history of the 1940 El-Centro earthquake. The study was carried out by using the commercial finite element software PLAXIS 3D. A three-dimensional analysis of the soil-pile foundation for four multi-story buildings is performed with different diameters (0.5, 0.7, and 1) m for the corner, exterior, and interior pile, respectively. The linear elastic model for pile foundation and the Mohr-Coulomb model for soil layers were used in this numerical analysis. The research showed that vertical settlement and horizontal displacement increase as the duration of the earthquake increases, and horizontal displacement with values smaller than vertical displacement. Also, the results showed the vertical settlement is similar for different diameters, in contrast to the horizontal displacement, which was of different values with a range between (3% to 22%) when the diameter increased from 0.5m, 0.7m, and 1m. Also, it can be observed that values increased with the direction of the earthquake from the right to the left side of the pile-soil system with a range of (12% to 32%).","PeriodicalId":294128,"journal":{"name":"Diyala Journal of Engineering Sciences","volume":"2003 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127318694","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