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Dynamics Of A Carriage System Of Comparator For Calibrating The Line Standards Of Length, A. Kilikevičius, V. Vekteris, V. Mokšin Apr 2025

Dynamics Of A Carriage System Of Comparator For Calibrating The Line Standards Of Length, A. Kilikevičius, V. Vekteris, V. Mokšin

The Journal of Engineering Research

This paper presents research dynamic properties of a calibration comparator which is used to calibrate high precision line standards of length. For this purpose, multi-body dynamic and mathematical models of a carriage system of the comparator were presented. Calculated amplitude-frequency responses and modes of oscillations allowed a determination of resonant frequencies of the system.

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Kinetics And Mechanism Of Bulk Polymerization Of Vinyl Chloride In A Polymerization Reactor, A. S. Ibrahim, Y. A. Ali, H. M. Saad, I. H. Amur Apr 2025

Kinetics And Mechanism Of Bulk Polymerization Of Vinyl Chloride In A Polymerization Reactor, A. S. Ibrahim, Y. A. Ali, H. M. Saad, I. H. Amur

The Journal of Engineering Research

Polyvinyl chloride (PVC) is the third most commonly produced polymer and is important because of its mechanical characteristics. The most common method of PVC manufacturing is the process of suspension. Although, there are several benefits associated with suspension, this study will focus on the bulk polymerization of vinyl chloride; highlight the physical and chemical properties of PVC, which can be changed through an estimation of the optimum ratio that exists between the hydrophilic and hydrophobic parts of the polymer’s surface, and propose a new mathematical model which will be helpful for the conversion of PVC into a useful form. The …

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Comparative Analysis Of Maximum Power Point Tracking Controllers Under Partial Shaded Conditions In A Photovoltaic System, R. Ramaprabha, S.P. Chitra Apr 2025

Comparative Analysis Of Maximum Power Point Tracking Controllers Under Partial Shaded Conditions In A Photovoltaic System, R. Ramaprabha, S.P. Chitra

The Journal of Engineering Research

Mismatching effects due to partial shaded conditions are the major drawbacks existing in today’s photovoltaic (PV) systems. These mismatch effects are greatly reduced in distributed PV system architecture where each panel is effectively decoupled from its neighboring panel. To obtain the optimal operation of the PV panels, maximum power point tracking (MPPT) techniques are used. In partial shaded conditions, detecting the maximum operating point is difficult as the characteristic curves are complex with multiple peaks. In this paper, a neural network control technique is employed for MPPT. Detailed analyses were carried out on MPPT controllers in centralized and distributed architecture …

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Investigations On Hysteresis-Based Current Control Techniques For Grid Connected Photovoltaic Systems, V. Rajini Apr 2025

Investigations On Hysteresis-Based Current Control Techniques For Grid Connected Photovoltaic Systems, V. Rajini

The Journal of Engineering Research

This paper focuses on delivering an effective performance qualification (PQ) control strategy for a grid connected photovoltaic (PV) system. A PV-based distributed generation system with a capacity of 10 kilo volt amps (kVA) was connected to the utility side of a power grid operating at 415 V. The power grid was modelled with a capacity of 100 kVA, 11 kV, and 100 km transmission line length. The PQ control strategy was implemented with three hysteresis-based current control techniques. To overcome the drawbacks of conventional hysteresis-control techniques, adaptive tuning of the hysteresis band was carried out, and a vector-based hysteresis current …

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Experimental And Modeling Investigations Of The Viscosity Of Crude Oil Binary Blends: New Models Based On The Genetic Algorithm Method, R.S. Al-Maamari, G. Vakili-Nezhaada, M. Vatani Apr 2025

Experimental And Modeling Investigations Of The Viscosity Of Crude Oil Binary Blends: New Models Based On The Genetic Algorithm Method, R.S. Al-Maamari, G. Vakili-Nezhaada, M. Vatani

The Journal of Engineering Research

Achieving an estimation of viscosity in crude oil binary mixtures is often difficult because the relationship of viscosity, to the fraction of each crude oil, and many other parameters and constants is comply. This relationship can be expressed by mathematical models with different variables. Besides the known models for predicting the viscosity of crude oil mixtures, the petroleum industry demands other models which give accurate predictions. In this work, two new empirical models have been developed for the calculation of the viscosity of binary crude oil blends. Two techniques—least square (LS) and genetic algorithm (GA)—were used to determine the parameters …

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M-Learning: The New Horizon Of Learning At Squ, Z. Al-Khanjari, K. Al-Kindi, A. Al-Zidi, Y. Baghdadi Apr 2025

M-Learning: The New Horizon Of Learning At Squ, Z. Al-Khanjari, K. Al-Kindi, A. Al-Zidi, Y. Baghdadi

The Journal of Engineering Research

M-learning extends the theory and practice of learning and mobility in converging technological environments. Developing a smart course in order to improve the standard of education at Sultan Qaboos University (SQU) is one of the main aims of the current authors. This proposal requires developing innovative applications for ubiquitous, mobile technologies for learning. This kind of development covers new educational and technological methods and concepts for supporting formal and informal learning. SQU is currently using Moodle as the open source e-learning management system to support and enhance traditional learning. Although elearning in SQU has proven its importance in enhancing traditional …

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On Sequence Lengths Of Some Special External Exclusive Or Type Lfsr Structures – Study And Analysis, A Ahmad, A Al Maashri Apr 2025

On Sequence Lengths Of Some Special External Exclusive Or Type Lfsr Structures – Study And Analysis, A Ahmad, A Al Maashri

The Journal of Engineering Research

The study of the length of pseudo-random binary sequences generated by Linear- Feedback Shift Registers (LFSRs) plays an important role in the design approaches of built-in selftest, cryptosystems, and other applications. However, certain LFSR structures might not be appropriate in some situations. Given that determining the length of generated pseudo-random binary sequence is a complex task, therefore, before using an LFSR structure, it is essential to investigate the length and the properties of the sequence. This paper investigates some conditions and LFSR’s structures, which restrict the pseudo-random binary sequences’ generation to a certain fixed length. The outcomes of this paper …

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Utilizing A Simple Numerical Model In Discrete Element Analysis To Simulate Flow Time And Number Tests Of Asphalt Mixes, A.M.A. Abdo Apr 2025

Utilizing A Simple Numerical Model In Discrete Element Analysis To Simulate Flow Time And Number Tests Of Asphalt Mixes, A.M.A. Abdo

The Journal of Engineering Research

During the past decades, many numerical models have been used to predict responses of asphalt mixes under different types of loading. Some of these models were simple due to practicality but overestimated the response of asphalt mixes. On the other hand, sophisticated but effective numerical models have been developed to address the shortcomings of the simpler models, and were used mostly in finite element analysis (FEA). However, these models were complicated and not user friendly. Recently, the approach of the discrete element method (DEM) was adopted. Unlike traditional FEA, DEM can simulate crack propagation by allowing the separation of elements …

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On Directed Edge-Disjoint Spanning Trees In Product Networks, An Algorithmic Approach, A.R. Touzene, K. Day Apr 2025

On Directed Edge-Disjoint Spanning Trees In Product Networks, An Algorithmic Approach, A.R. Touzene, K. Day

The Journal of Engineering Research

In (Ku et al. 2003), the authors have proposed a construction of edge-disjoint spanning trees EDSTs in undirected product networks. Their construction method focuses more on showing the existence of a maximum number (n1+n2-1) of EDSTs in product network of two graphs, where factor graphs have respectively n1 and n2 EDSTs. In this paper, we propose a new systematic and algorithmic approach to construct (n1+n2) directed routed EDST in the product networks. The direction of an edge is added to support bidirectional links in interconnection networks. Our EDSTs can be used straightforward to develop efficient collective communication algorithms for both …

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Multi Objective Optimization Of Flux Cored Arc Weld Parameters Using Hybrid Grey - Fuzzy Technique, M Satheesh, Jer Dhas Apr 2025

Multi Objective Optimization Of Flux Cored Arc Weld Parameters Using Hybrid Grey - Fuzzy Technique, M Satheesh, Jer Dhas

The Journal of Engineering Research

In the present work, an attempt has been made to use the grey-based fuzzy logic method to solve correlated multiple response optimization problems in the field of flux cored arc welding. This approach converts the complex multiple objectives into a single grey-fuzzy reasoning grade. Based on the grey-fuzzy reasoning grade, optimum parameters are identified. The significant contributions of parameters are estimated using analysis of variance (ANOVA). This evaluation procedure can be used in intelligent decision making for a welding operator. The proposed and developed method has good accuracy and competency. The proposed technique provides manufacturers who develop intelligent manufacturing systems …

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Modeling Of Construction Cost Of Villas In Oman, Ma Al-Mohsin, As Al-Nuaimi Apr 2025

Modeling Of Construction Cost Of Villas In Oman, Ma Al-Mohsin, As Al-Nuaimi

The Journal of Engineering Research

In this research, a model for estimating construction cost of villas is presented. The model takes into account four major factors affecting villa's cost, namely: built up area, number of toilets, number of bedrooms and the number of stories. A field survey was conducted to collect information required for such model using data collection form designed by the researchers. Information about 150 villas was collected from six well experienced consultants in the field of villa design and supervision in Oman. Collected data was analyzed to develop suggested model which consists of two main levels of estimate. The first level is …

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Identification Of Pavement Distress Types And Pavement Condition Evaluation Based On Network Level Inspection For Jazan City Road Network, M Mubaraki Apr 2025

Identification Of Pavement Distress Types And Pavement Condition Evaluation Based On Network Level Inspection For Jazan City Road Network, M Mubaraki

The Journal of Engineering Research

The first step in establishing a pavement management system (PMS) is road network identification. An important feature of a PMS is the ability to determine the current condition of a road network and predict its future condition. Pavement condition evaluation may involve structure, roughness, surface distress, and safety evaluation. In this study, a pavement distress condition rating procedure was used to achieve the objectives of this study. The main objectives of this study were to identify the common types of distress that exist on the Jazan road network (JRN), either on main roads or secondary roads, and to evaluate the …

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Contrast Enhancement Using Brightness Preserving Histogram Equalization Technique For Classification Of Date Varieties, G Thomas, A Manickavasagan, L Khriji, R Al-Yahyai Apr 2025

Contrast Enhancement Using Brightness Preserving Histogram Equalization Technique For Classification Of Date Varieties, G Thomas, A Manickavasagan, L Khriji, R Al-Yahyai

The Journal of Engineering Research

Computer vision technique is becoming popular for quality assessment of many products in food industries. Image enhancement is the first step in analyzing the images in order to obtain detailed information for the determination of quality. In this study, Brightness preserving histogram equalization technique was used to enhance the features of gray scale images to classify three date varieties (Khalas, Fard and Madina). Mean, entropy, kurtosis and skewness features were extracted from the original and enhanced images. Mean and entropy from original images and kurtosis from the enhanced images were selected based on Lukka's feature selection approach. An overall classification …

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A General Ritz Algorithm For Static Analysis Of Arbitrary Laminated Composite Plates Using First Order Shear Deformation Theory, Rf Rango, Fj Bellomo, Lg Nallim Apr 2025

A General Ritz Algorithm For Static Analysis Of Arbitrary Laminated Composite Plates Using First Order Shear Deformation Theory, Rf Rango, Fj Bellomo, Lg Nallim

The Journal of Engineering Research

This paper is concerned with the bending of laminated composite plates with arbitrary lay-up and general boundary conditions. The analysis is based on the small deflection, first-order shear deformation theory of composite plates, which utilizes the Reissner-Mindlin plate theory. In solving the aforementioned plate problems, a general algorithm based on the Ritz method and the use of beam orthogonal polynomials as coordinate functions is derived. This general algorithm provides an analytical approximate solution that can be applied to the static analysis of moderately thick laminated composite plates with any lamination scheme and combination of edge conditions. The convergence, accuracy, and …

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Solution Methods For The Periodic Petrol Station Replenishment Problem, C Triki Apr 2025

Solution Methods For The Periodic Petrol Station Replenishment Problem, C Triki

The Journal of Engineering Research

In this paper we introduce the Periodic Petrol Station Replenishment Problem (PPSRP) over a T-day planning horizon and describe four heuristic methods for its solution. Even though all the proposed heuristics belong to the common partitioning-then-routing paradigm, they differ in assigning the stations to each day of the horizon. The resulting daily routing problems are then solved exactly until achieving optimalization. Moreover, an improvement procedure is also developed with the aim of ensuring a better quality solution. Our heuristics are tested and compared in two real-life cases, and our computational results show encouraging improvements with respect to a human planning …

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A New Scheme For Crack Growth Modeling By Coupling Modified Quarter Point Crack-Tip Element And The Level Set Method, Y Abdelaziz Apr 2025

A New Scheme For Crack Growth Modeling By Coupling Modified Quarter Point Crack-Tip Element And The Level Set Method, Y Abdelaziz

The Journal of Engineering Research

In this paper, an efficient, numerical procedure is presented to track crack growth modeling without remeshing. The method's key feature is the coupling of a modified quarter-point crack tip element (MQPE) with the level set method (LSM) for crack growth problems. The LSM was used to represent the crack location, including the location of crack tips. The MQPE was used to compute the stress and displacement fields necessary for determining the rate of crack growth. Numerical test cases including various geometrical exceptions (the center-crack plate specimen, the single edge-crack plate specimen, and the double-edge crack plate) demonstrate the accuracy, robustness, …

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Comparison Of Interleaved Boost Converter Configurations For Solar Photovoltaic System Interface, R Ramaprabha, K Balaji, Sb Raj, Vd Logeshwaran Apr 2025

Comparison Of Interleaved Boost Converter Configurations For Solar Photovoltaic System Interface, R Ramaprabha, K Balaji, Sb Raj, Vd Logeshwaran

The Journal of Engineering Research

Solar photovoltaic (SPV) panels that convert light energy into electrical energy through the photovoltaic effect have nonlinear internal resistance. Hence, with the variation in the intensity of light falling on the panel, the internal resistance varies. For effective utilization of the SPV panel, it is necessary to extract the maximum power from it. For maximum power extraction from SPV panels, DC-DC converter interface is used. The problem in using high frequency converter interface is the resultant high frequency ripple interaction with the SPV system. In this work, an interleaved boost converter (IBC) is considered to reduce the ripple. Our finding …

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Coupling And Damping Effects On The Dynamics Of Submerged Expanded Tubes In Borehole Wells, A Karrech, Ac Seibi Apr 2025

Coupling And Damping Effects On The Dynamics Of Submerged Expanded Tubes In Borehole Wells, A Karrech, Ac Seibi

The Journal of Engineering Research

Hydraulic expansion of submerged tubes is accomplished by propelling a mandrel through it using differential pressure. This process deforms the tube beyond its elastic limit. Toward the end of the expansion process, the mandrel pops out of the tube resulting in displacement, stress, and pressure waves propagating through the system. A mathematical model has been developed to describe the dynamics of the tube-fluid system due to the pop-out phenomenon. The model takes into consideration the coupling effect between fluids and the structure, as well as the inherent system damping of its response. An analytical solution describing the wave propagation in …

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Anisotropic Deformation Behavior Of Al2024t351 Aluminum Alloy, R Khan Apr 2025

Anisotropic Deformation Behavior Of Al2024t351 Aluminum Alloy, R Khan

The Journal of Engineering Research

The objective of this work was to investigate the effects of material anisotropy on the yielding and hardening behavior of 2024T351 aluminum alloy using isotropic and anisotropic yield criteria. Anisotropy may be induced in a material during the manufacturing through processes like rolling or forging. This induced anisotropy gives rise to the concept of orientation-dependent material properties such as yield strength, ductility, strain hardening, fracture strength, or fatigue resistance. Inclusion of the effects of anisotropy is essential in correctly predicting the deformation behavior of a material. In this study, uniaxial tensile tests were first performed in all three rolling directions, …

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Tube Expansion Under Various Down-Hole End Conditions, Fj Sanchez, Os Al-Abri Apr 2025

Tube Expansion Under Various Down-Hole End Conditions, Fj Sanchez, Os Al-Abri

The Journal of Engineering Research

Fossil hydrocarbons are indispensables commodities that motorize the global economy, and oil and gas are two of those conventional fuels that have been extracted and processed for over a century. During last decade, operators face challenges discovering and developing reservoirs commonly found up to several kilometers underground, for which advanced technologies are developed through different research programs. In order to optimize the current processes to drill and construct oil/gas wells, a large number of mechanical technologies discovered centuries ago by diverse sectors are implemented by well engineers. In petroleum industry, the ancient tube forming manufacturing process founds an application once …

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Comparative Study On Impacts Of Power Curve Model On Capacity Factor Estimation Of Pitch-Regulated Turbines, Mh Albadi, Ef El-Saadany Apr 2025

Comparative Study On Impacts Of Power Curve Model On Capacity Factor Estimation Of Pitch-Regulated Turbines, Mh Albadi, Ef El-Saadany

The Journal of Engineering Research

The amount of energy produced by a turbine depends on the characteristics of both wind speed at the site under investigation and the turbine's power performance curve. The capacity factor (CF) of a wind turbine is commonly used to estimate the turbine's average energy production. This paper investigates the effect of the accuracy of the power curve model on CF estimation. The study considers three CF models. The first CF model is based on a power curve model that underestimates the turbine output throughout the ascending segment of the power curve. To compensate for the aforementioned discrepancy, the Weibull parameters, …

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Simulation Of Solar Radiation Incident On Horizontal And Inclined Surfaces, Ma Basunia, H Yoshio, T Abe Apr 2025

Simulation Of Solar Radiation Incident On Horizontal And Inclined Surfaces, Ma Basunia, H Yoshio, T Abe

The Journal of Engineering Research

A computer model was developed to simulate the hourly, daily and monthly average of daily solar radiation on horizontal and inclined surfaces. The measured hourly and daily solar radiation was compared with simulated radiation, and favourable agreement was observed for the measured and predicted values on clear days. The measured and simulated monthly averages of total (diffuse and beam) daily solar radiation were compared and a reasonable agreement was observed for a number of stations in Japan. The simulation showed that during the rice harvesting season, September to October, there is a daily average of 14.7 MJ/m2 of solar irradiation …

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Development Of Stand Alone Application Tool For Processing And Quality Measurement Of Weld Imperfection Image Captured By Μ-Focused Digital Radiography Using Matlab- Based Graphical User Interface, Pz Nadila, Yhp Manurung, Sa Halim, Sk Abas, G Tham, E Haruman, M Mokhtar, Z Awaldin Apr 2025

Development Of Stand Alone Application Tool For Processing And Quality Measurement Of Weld Imperfection Image Captured By Μ-Focused Digital Radiography Using Matlab- Based Graphical User Interface, Pz Nadila, Yhp Manurung, Sa Halim, Sk Abas, G Tham, E Haruman, M Mokhtar, Z Awaldin

The Journal of Engineering Research

Digital radiography incresingly is being applied in the fabrication industry. Compared to film- based radiography, digitally radiographed images can be acquired with less time and fewer exposures. However, noises can simply occur on the digital image resulting in a low-quality result. Due to this and the system’s complexity, parameters’ sensitivity, and environmental effects, the results can be difficult to interpret, even for a radiographer. Therefore, the need of an application tool to improve and evaluate the image is becoming urgent. In this research, a user-friendly tool for image processing and image quality measurement was developed. The resulting tool contains important …

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Optimizing Maintenance Planning In The Production Industry Using The Markovian Approach, B Kareem, Ha Owolabi Apr 2025

Optimizing Maintenance Planning In The Production Industry Using The Markovian Approach, B Kareem, Ha Owolabi

The Journal of Engineering Research

Maintenance is an essential activity in every manufacturing establishment, as manufacturing effectiveness counts on the functionality of production equipment and machinery in terms of their productivity and operational life. Maintenance cost minimization can be achieved by adopting an appropriate maintenance planning policy. This paper applies the Markovian approach to maintenance planning decision, thereby generating optimal maintenance policy from the identified alternatives over a specified period of time. Markov chains, transition matrices, decision processes, and dynamic programming models were formulated for the decision problem related to maintenance operations of a cable production company. Preventive and corrective maintenance data based on workloads …

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Rbf Neural Network Approach For Identification And Control Of Dc Motors, Ea Feilat, Ek Ma'aita Apr 2025

Rbf Neural Network Approach For Identification And Control Of Dc Motors, Ea Feilat, Ek Ma'aita

The Journal of Engineering Research

In this paper, a neural network approach for the identification and control of a separately excited direct (DC) motor (SEDCM) driving a centrifugal pump load is applied. In this application, two radial basis function neural networks (RBFNN) are used: The first is a RBFNN identifier trained offline to emulate the dynamic performance of the DC motor-load system. The second is a RBFNN controller, which is trained to make the motor speed follow a selected reference signal. Two RBFNN control schemes are proposed using direct inverse and internal model control schemes. The performance of the RBFNN identifier and controller is investigated …

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Thermal Performance Of Solar Hot Water Systems Using A Flat Plate Collector Of Accelerated Risers, Ke Amori, Ns Jabouri Apr 2025

Thermal Performance Of Solar Hot Water Systems Using A Flat Plate Collector Of Accelerated Risers, Ke Amori, Ns Jabouri

The Journal of Engineering Research

This study focuses on a comparison of the performance of two similar locally-fabricated solar water heaters. One of the collectors features a new design for accelerated absorber; its risers are made of converging ducts whose exit area is half that of the entrance. The other collector is a conventional absorber, with risers of the same cross sectional area along its length. Each collector is the primary part of an indirect thermosyphon circulation solar hot water system. Both collectors face south with a fixed tilt angle of 33.3

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Performance Of Porous Breakwaters: Application Of The Bouss-2d Model, R Balaji Apr 2025

Performance Of Porous Breakwaters: Application Of The Bouss-2d Model, R Balaji

The Journal of Engineering Research

The hydrodynamic performance of porous breakwaters was studied by numerical analysis to assess reflection and transmission characteristics. The finite-difference method on BOUSS-2D was used to test the efficiency of porous breakwaters. The effects of porosity on reflection and transmission characteristics under the action of regular waves were investigated. The wave elevation time histories obtained from the numerical study were compared to those measured during an experimental study, on the leeward and seaward sides of the porous breakwater and were found to be in close agreement. The reflection coefficient increases, whereas the transmission coefficient decreases with a decrease in the porosity. …

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Optimal Machining Parameters For Achieving The Desired Surface Roughness In Turning Of Steel, Lb Abhang, M Hameedullah Apr 2025

Optimal Machining Parameters For Achieving The Desired Surface Roughness In Turning Of Steel, Lb Abhang, M Hameedullah

The Journal of Engineering Research

Due to the widespread use of highly automated machine tools in the metal cutting industry, manufacturing requires highly reliable models and methods for the prediction of output performance in the machining process. The prediction of optimal manufacturing conditions for good surface finish and dimensional accuracy plays a very important role in process planning. In the steel turning process the tool geometry and cutting conditions determine the time and cost of production which ultimately affect the quality of the final product. In the present work, experimental investigations have been conducted to determine the effect of the tool geometry (effective tool nose …

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Dynamic Analysis And Vibration Of Beam Inside Annulus For Ultra Short-Radius Water Jet Drilling, T Pervez, Sa Al-Hiddabi, A Al-Yahmadi, Ac Seibi Apr 2025

Dynamic Analysis And Vibration Of Beam Inside Annulus For Ultra Short-Radius Water Jet Drilling, T Pervez, Sa Al-Hiddabi, A Al-Yahmadi, Ac Seibi

The Journal of Engineering Research

Conventional water-jet nozzle systems have been developed and partially used in the oil and gas industry to drill horizontal sidetracks. However, this technique still presents a few shortcomings associated with tube buckling and water jet sagging. Due to these problems, the drilled hole deviates from the desired path and does not reach the target reservoir. The issue becomes more complex due to the continuously moving boundaries representing the borehole profile, which is, in turn, governed by the nozzle dynamics. A mathematical model representing the dynamics of water jet drilling confined in a borehole along with drilling mud is developed to …

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Cfd Analysis Of Water Solitary Wave Reflection, K. Smida, H. Lamloumi, K. Maalel, Z. Hafsia Apr 2025

Cfd Analysis Of Water Solitary Wave Reflection, K. Smida, H. Lamloumi, K. Maalel, Z. Hafsia

The Journal of Engineering Research

A new numerical wave generation method is used to investigate the head-on collision of two solitary waves. The reflection at vertical wall of a solitary wave is also presented. The originality of this model, based on the Navier-Stokes equations, is the specification of an internal inlet velocity, defined as a source line within the computational domain for the generation of these non linear waves. This model was successfully implemented in the PHOENICS (Parabolic Hyperbolic Or Elliptic Numerical Integration Code Series) code. The collision of two counter-propagating solitary waves is similar to the interaction of a soliton with a vertical wall. …

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