Table of content

Journal of Engineering

مجلة الهندسة

ISSN: 17264073 25203339
Publisher: Baghdad University
Faculty: Engineering
Language: Arabic and English

This journal is Open Access

About

The Journal Engineering was issued in 1986. It was Stopped from 1990 – 1997 because of the economic blockade. It restarted publication after the fourth scientific engineering conference for it published the papers that were accepted in the conference.
It is a scientific engineering journal refereed by specialized and qualified professors in most of the engineering fields and those Specialists in the issued by the college of Engineering university of Baghdad .It was serenely publibued , but from 2011 it has issued of monthly for the numerous papers submitted to the journal to publish their papers in this scientific journal in addition to some of the Arabs professors because the journal is considered one of the valued journals in the Arabic homelan .
Many professions were the head editor of the journal from its first issue. The first one was prof.dr. Laith Ismail Namiq then prof.dr. Mohammed A.Alawis ,prof.dr.Ali A Al – kilidar prof.dr. Abdul-Ilah Younis and currently Prof.dr.Qais S. Ismail.

AIMS AND SCOPE

The Journal of Engineering is an open access, monthly, refereed, peer-reviewed journal. It focuses on the different disciplines of engineering.

Its scope is to cover almost all the aspects of engineering and technology and their related topics. The Journal of Engineering tries to emphasize on publishing high-quality papers with an acceptable, professional and considerable background.

The submitted papers undergo plagiarism, a double-blind peer review by professionals in the paper specific specialty. This process is accomplished according to the Journal criteria of evaluation, where the manuscript, contents, and organization of the paper are to be checked. The papers will be available online for the readers.

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Contact info

Jadriyah, Baghdad
Iraq
Mobile:+964 7714076860
Email: info@jcoeng.edu.iq
https://www.jcoeng.edu.iq

Table of content: 2018 volume:24 issue:4

Article
Effect of Using Extra Fins on the Pin Fin Classic Geometry for Enhancement Heat Sink Performance using EGM Method
تأثير استخدام زوائد زعنفية مع الشكل التقليدي للزعانف الابرية على تعزيز الاداء الحراري للزعانف باستخدام طريقة تقليل التولد الانتروبي

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Abstract

In the present study, the effect of new cross-section fin geometries on overall thermal/fluid performance had been investigated. The cross-section included the base original geometry of (triangular, square, circular, and elliptical pin fins) by adding exterior extra fins along the sides of the origin fins. The present extra fins include rectangular extra fin of 2 mm (height) and 4 mm (width) and triangular extra fin of 2 mm (base) 4 mm (height). The use of entropy generation minimization method (EGM) allows the combined effect of thermal resistance and pressure drop to be assessed through the simultaneous interaction with the heat sink. A general dimensionless expression for the entropy generation rate is obtained by considering a control volume around the pin fin including a base plate and applying the conservations equations of mass and energy with the entropy balance. The dimensionless numbers used includes the aspect ratio (ε), Reynolds number (Re), Nusselt number (Nu), and the drag coefficients (CD). Fourteen different cross-section fin geometries are examined for the heat transfer, fluid friction, and the minimum entropy generation rate. The results showed that the Nusselt number increases with increasing the Reynolds number for all employed models. The ellipse models (ET and ER-models) give the highest value in the Nusselt number as compared with the classical pin fins. The fin of the square geometry with four rectangular extra fins (SR-models) gives an agreement in Nusselt number as compared with the previous study.


Article
Integration of Transportation Stations as Intermodal Stations
تكامل محطات النقل كمحطات متعددة الوسائط

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Abstract

Ease of transfer between different modes of public transportation within the stations is a significant contribution to the movement that can be provided by transportation industries to develop solutions of integrated transportation. It is future integrated multimodal transportation, to make public transportation more enjoyable and interesting, in addition to passenger transportation and future movement of goods are also depend on multimodal transportation The importance of interchange promotion between multimodal as a basic feature of passengers buildings in modern Railway Stations the Research problem:" concedered about the gab of knowledge in the integrated of railway stations within intermodal transportation system in order to operate these stations efficiently, functionally, environmentally and socially".. The importance of this research is: the role of integrated multimodal transportation stations and the extent integration functional, environmentally and operationally, where this integration plays a major role by giving the expressionistic and Iconic. the hypothesis formulated from this problem is: the integrated railway stations are huge and multi-facilities of activities which works such a cities by one-system consists of the several systems integrated with each other in planning and a design that making integrated this building with other transportation stations as Intermodal Transportation systems within operation systems in planning and design levels, and posative action with environment functionally and operationally.


Article
Energy and Exergy Analysis of Dual Channel Solar Air Collector with Different Absorber Plates Geometry
التحليل الحراري وتحليل الطاقة المتاحة لمجمع شمسي مزدوج القناة يعمل بالهواء باستعمال وسط ماص للحرارة

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Abstract

Flat-plate collector considers most common types of collectors, for ease of manufacturing and low price compared with other collectors. The main aim of the present work is to increase the efficiency of the collector, which can be achieved by improving the heat transfer and minimize heat loss experimentally. Five types of solar air collectors have been tested, which conventional channel with a smooth absorber plate (model I), dual channel with a smooth absorber plate (model II), dual channel with perforating “V” corrugated absorber plate (model III), dual channel with internal attached wire mesh (model Ⅳ), and dual channel with absorber sheet of transparent honeycomb, (model Ⅴ). The dual channel collector used for increasing heat transfer area and heat removal factor to improve thermal performance. The outdoor test was conducted during the period December (2016) to February (2017) at different mass flow rates 0.0217 kg/s, 0.0271 kg/s and 0.0325 kg/s. The experiments were carried out from 8:30 AM to 3:00 PM for clear days. Experimental results show that the average thermal efficiency was (72.2 %) for model (III), (40.2 %) for model (I), (51.6 %) for model (II), (65.1 %) for model (Ⅳ) and (59.7 %) for model (Ⅴ). At the last part of the study, the exergy analyses were derived for both collectors. The results of this part showed that the conventional channel model (I) is having largest irreversibility, and the dual channel collector model (III) is having a greatest exergetic efficiency.


Article
Alliteration strategy In Contemporary Architecture
الرؤية الإستراتيجية لمفهوم الجناس في العمارةالمعاصرة

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Abstract

The contemporary ideas were characterized by the abundance and diversity of their knowledge, human and conceptual production, the strategy is both a general and a detailed framework covering all design disciplines both inside and outside the field of architecture. From here, many of these terraces emerged from fields outside the field of architecture, but soon moved to form an important nerve within the field of architecture. Hence the need to define a more comprehensive framework for studying one of the concepts that can frame the framework, namely the concept of "Alliteration", and its adoption as an architectural design strategy aimed at giving the resulting form a feature of rhetoric. So the research highlighted the "scientific need to clarify knowledge about the concept of alliteration as a strategy in the design process". The aim of the research is to "clarify the knowledge about the concept of alliteration as a strategy in the design process and to reveal its mechanisms through which it can reach a contemporary architectural form characterized by rhetoric. The research approach represents several procedures to achieve the goal of research and solving the problem of research through the construction of a theoretical framework and the development of the main and secondary vocabulary after the introduction of previous cognitive studies to the selection of samples for application, then discuss, analyze the results and conclusions. Which explained that the strategy of the alliteration enables the reading of the text of the architect within the objectives of both the designer and the recipient of the product, by combining similar systems in form and content, and the integration of properties, reducing the number of words and expand their participation of recipients as a result of reliance on subjective references within the field of architecture.


Article
Evaluation the Effect of Vibration on the Corrosion Rate of Automotive Paints
تقييم تأثير الاهتزازات على معدل التأكل في طلاءات السيارات

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Abstract

This paper studies the influence of temperature on the corrosion rate of coated AA6111 aluminum alloy used in vehicle bodies under static and vibration states. The vibration test system was collected laboratory and used for testing of five different types of paints (EASI, Numix, Lesonal, DENSO and Polaron paints) in the 5 % NaCl solution using immersion test method. Lesonal paint provided the best corrosion protection, while DENSO paints show large values of corrosion rate, other coatings exhibit moderate values. Model of paints corrosion was developed to characterize the corrosion processes occur at the surfaces. It is found that corrosion rate obtained at vibration cases is larger than static cases and vibration effect on the coating protection rate.


Article
Potential of Microalgae Cultivation in Dairy Wastewater as a Step in Low-Cost Biofuel Production
امكانية زراعة الطحالب الدقيقة في المخلفات المائية للالبان كخطوة في انتاج وقود حيوي منخفض الكلفة

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Abstract

The present study addresses adopting the organic and nutritious materials in dairy wastewater as media for cultivation of microalgae, which represent an important source of renewable energy. This study was carried out through cultivation of three types of microalgae; Chlorella sp., Synechococcus, and Anabaena. The results shows the success the cultivation of the Synechococcus and Chlorella Sp, while the Anabaena microalgae were in low-growth level. The highest growth was in the Synechococcus farm, followed by Chlorella and Anabaena. However, the growth of Synechococcus required 10 days to achieve this increase that represents a negative indicator of the adoption of this type of microalgae in this media to meet the desired aims. While Chlorella needs less than two days to start growing. Moreover, the data obtained from the experiment show that removal of chemical oxygen demand in Chlorella cultures was (72%) more than that obtained from cultivation of other microalgae. Thus this microalgae is more efficient in wastewater treatment than other types.


Article
Effecting of pH Parameter on Simulated Wastewater Treatment Using Electrocoagulation Method
تأثير الدالة الحامضية على معالجة مياه الصرف المحاكاة باستخدام طريقة التخثير الكهربائي

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Abstract

The aim of the present research is to investigate the effecting of pH parameter on the feasibility of lead removal from simulated wastewater using an electrochemical system. Electrocoagulation method is one of electrochemical technology which is used widely to treat industrial wastewater. Parameters affecting this operation, such as initial metal concentration, applied current, stirrer speed, and contact time of electroprocessing were taken as 155ppm, 1.5 Ampere, 150 rpm, 60 minutes respectively. While pH of the simulated wastewater was in the range of 2 to 12 in the experiments. It was found from the results that pH is an important parameter affecting lead removal operation. The best value of pH parameter is approximately (9.50) that gave higher removal efficiency larger than (99%).


Article
Estimation of Minimum Miscibility Pressure for 〖CO〗_2 Flood Based on EOS
تخمين ادنى ضغط امتزاج لازاحة غاز ثنائي اوكسيد الكاربون بالاعتماد على معادلة الحالة

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Abstract

CO2 Gas is considered one of the unfavorable gases and it causes great air pollution. It’s possible to decrease this pollution by injecting 〖 CO〗_2 gas in the oil reservoirs to provide a good miscibility and to increase the oil recovery factor. MMP was estimated by Peng Robinson equation of state (PR-EOS). South Rumila-63 (SULIAY) is involved for which the miscible displacement by〖 CO〗_2 is achievable based on the standard criteria for success 〖 CO〗_2 EOR processes. A PVT report was available for the reservoir under study. It contains deferential liberation (DL) and constant composition expansion (CCE) tests. PVTi software is one of the (Eclipse V.2010) software’s packages, it has been used to achieve the goal. Many trials have been done to match the data of DL test by tuning some of the PR-EOS parameters through the regression analysis process, but no acceptable match was obtained especially for saturation pressure. However; splitting the mole fraction of (C6+) to many pseudo components was carried out, and then a regression analysis process was made again to improve the matching by tuning some of the PR-EOS parameters. A good estimate of saturation pressure and a good match of PVT properties was noted. Ternary diagram has been constructed to represent the phase behavior of CO_2-Oil and to calculate MMP for the South Rumila-63 (SULIAY) oil well.


Article
Estimating Angle of Arrival (AOA) for Wideband Signal by Sensor Delay Line (SDL) and Tapped Delay Line (TDL) Processors
تخمين زاوية الوصول للاشارات ذات الحزم العريضة من قبل المعالجات تأخير زمن وصول الاشاره (TDL) وعناصر هوائي ملحقه للحصول على زمن تأخير متغير.(SDL)

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Abstract

Angle of arrival (AOA) estimation for wideband signal becomes more necessary for modern communication systems like Global System for Mobile (GSM), satellite, military applications and spread spectrum (frequency hopping and direct sequence). Most of the researchers are focusing on how to cancel the effects of signal bandwidth on AOA estimation performance by using a transversal filter (tap delay line) (TDL). Most of the researchers were using two elements array antenna to study these effects. In this research, a general case of proposed (M) array elements is used. A transversal filter (TDL) in phase adaptive array antenna system is used to calculate the optimum number of taps required to compensate these effect. The proposed system uses a phase adaptive array antenna in conjunction with LMS algorithm to work an angle of arrival (AOA) estimator for wideband signals rather than interference canceller. An alternative solution to compensate for the effect of signal bandwidth is proposed by using sensor delay line (SDL) instead of fixed delay unit since it has variable time sampling in the time domain and not fixed time delay, depending on the angle of arrival of received signals. The proposed system has the ability to estimate two parameters for received signals simultaneously (the output Signal to Noise Ratio (SNR) and AOA), unlike others systems which estimate AOA only. The comparison of the simulation results with Multiple Signal Classification (MUSIC) technique showed that the proposed system gives good results for estimating AOA and the output SNR for wideband signals. (SDL) processor shows better performance result than (TDL) processor. MUSIC technique with both (SDL) and (TDL) processors shows unacceptable results for estimating (AOA) for the wideband signal.


Article
Seismic Response of Nonseismically Designed Reinforced Concrete Low Rise Buildings
الاستجابة الزلزالية للابنية الخرسانية المسلحة واطئة الارتفاع وغير المصممة لتأثير الزلازل

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Abstract

In this paper, the time-history responses of a square plan two-story reinforced concrete prototype building, considering the elastic and inelastic behavior of the materials, were studied numerically. ABAQUS software was used in three-dimensional (3D) nonlinear dynamic analysis to predict the inelastic response of the buildings. Concrete Damage Plasticity Model (CDPM) has been used to model the inelastic behavior of the reinforced concrete building under seismic excitation. The input data included geometric information, material properties, and the ground motion. The building structure was designed only for gravity load according to ACI 318 with non-seismically detailing requirements. The prototype building was subjected to El Centro 1940 NS earthquake at different amplitudes (PGA=0.05g, PGA=0.15g, and PGA=0.32g). The elastic and inelastic responses of the 3D numerical model of the same building were evaluated. The differences between the elastic and inelastic displacements and base shear forces were analyzed. It was found from the results that base shear responses are significantly more sensitive to the numerical model of analysis than displacement responses. The evaluation showed that the base shear force and displacement responses of a two-story R.C. building subjected to severe earthquake excitation are very sensitive to the numerical model used whether it is elastic or inelastic.


Article
Thermal Analysis of Reinforced Concrete Deep Beams Using Finite Element Modeling
التحليل الحراري للعتبات الخرسانية المسلحة العميقة باستخدام طريقة العناصر المحددة

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This research investigates the analysis of reinforced concrete deep beams that is exposed to an elevated temperature using non-linear finite element modeling. Bending strength and behavior of reinforced concrete deep beams have been discussed. The thermal analysis uses the finite element method by ANSYS package (Release 11.0) program to model the temperature distribution of R.C. deep beam exposed to high temperatures. The results of the thermal analysis models have been compared to the experimental results in the literature. Good agreement has been observed between the results, where the max difference for bending strength was (18)%, and for deflection, the max difference was (13)%.


Article
Water Quality Assessment and Total Dissolved Solids Prediction using Artificial Neural Network in Al-Hawizeh Marsh South of Iraq
تقييم نوعية المياه والتنبؤ للمواد الصلبة الذائبة الكلية باستخدام الشبكة العصبية الاصطناعية في هور الحويزة جنوب العراق

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Abstract

The Iraqi marshes are considered the most extensive wetland ecosystem in the Middle East and are located in the middle and lower basin of the Tigris and Euphrates Rivers which create a wetlands network and comprise some shallow freshwater lakes that seasonally swamped floodplains. Al-Hawizeh marsh is a major marsh located east of Tigris River south of Iraq. This study aims to assess water quality through water quality index (WQI) and predict Total Dissolved Solids (TDS) concentrations in Al-Hawizeh marsh based on artificial neural network (ANN). Results showed that the WQI was more than 300 for years 2013 and 2014 (Water is unsuitable for drinking) and decreased within the range 200-300 in years 2015 and 2016 (Very poor water). The developed ANN mode gave a high correlation coefficient reaching 0.927 for the prediction of TDS from the model and showed high levels of TDS in Al-Hawizeh marsh that pose threats to people using the marsh for drinking and other uses. The dissolved Oxygen concentration has the highest importance of 100% in the model because the water of the marsh is fresh water, while Turbidity had the lowest importance.

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