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1974 articles for “investigations” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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Optimizing Heat Transfer in Rectangular Channels with Turbulators: A Comprehensive Review
Abstract: Turbulators and various obstructions strategically placed along the airflow path in a channel are employed to enhance heat transfer This enhancement is achieved by disrupting the laminar sub-layer or intensifying turbulence within the duct passage. Numerous types of turbulator elements have been extensively utilized to optimize the heat transfer characteristics in such systems. Investigating further, researchers have explored the application of roughness elements in two-dimensional, three-dimensional, and irregular shapes. This …
Published in Journal of Experimental & Applied Mechanics · Vol. 14, Issue 3, 2023 · pp. 7–17 Read article
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Mathematical Modeling and Design of Improved Maximum Power Point Tracking System for Solar Photovoltaic System for Renewable Energy Applications
Abstract: This paper investigates the implementation of maximu m point tracking system for grid connected solar photovoltaic system using converters topology including maximu m power point tracking system. The implementation of maximu m point tracking system is realized with the help of incremental conductance method. The implementation is done for cuk converters and sepic converters to investigate the effect of maximu m power point tracking and effect of converter topology with …
Published in Journal of Electronic Design Technology · Vol. 12, Issue 3, 2021 · pp. 25–36 Read article
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Modeling Reaction Rate of Dispersion Coefficient and Oxygen Deficit on Nitrobacteria Transport in Onu-Imo River
Abstract: The migration rate of nitrobacteria in the Onu-Imo River was monitored based on some variables that determine the predictive model for such pollution transport. These parameters were factors applied in developing the derived model for the study. The variables were integrated into the system to monitor their various rates of impact on the transport process in the study environment. This was monitored by applying a one-dimensional flow transport system at …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 11, Issue 1, 2021 · pp. 28–41 Read article
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Colour Removal from Effluents Using Micromaterials
Abstract: In this study, the ability of Micromaterials to adsorb color from an aqueous solution was investigated by using flocculants and activated carbon prepared from Rice Bran, an agricultural by-product, and batch mode adsorption experiments were conducted. The influence of various factors such as initial concentration (20, 40, 60, 80 mg/L), contact time, pH (4.0-9.0), and dosage on the adsorption capacity was investigated and optimal experimental conditions were ascertained. Adsorption data …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 2, Issue 1-3, 2012 · pp. 1–8 Read article
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Effect of Layering of Reinforcement on Bearing Capacity of Shallow Footing Resting on Sand
Abstract: The study was done to investigate the performance of reinforced soil foundation. The construction of reinforced soil foundation has a cost effective alternative to conventional methods. Performance characteristics were improved by using one or more layers of non-woven geotextile placed beneath the footing to create a composite material. The reinforcement in the soil interacts with the soil and is resisted by friction, adhesion or passive / bearing capacity. To study …
Published in Journal of Geotechnical Engineering · Vol. 5, Issue 2, 2018 · pp. 15–19 Read article
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An Innovative Technique for Soil Improvement by Polythene Waste
Abstract: This study investigated the possibility of making use of polyethylene buying baggage waste to boost soils to pave way for its use in civil engineering projects together with in street bases, embankments and slope stabilisation. A chain of direct shear tests become undertaken on soil-plastic composites of decided on sandy soils: Klipheuwel and Cape residences sands. Strips of shredded plastic cloth had been used as reinforcement inclusions at concentrations of …
Published in Journal of Geotechnical Engineering · Vol. 3, Issue 2, 2016 · pp. 7–11 Read article
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Bond Behavior of Reinforced Concrete using Artificial Sand with Quarry Dust as Fine Aggregate
Abstract: Reinforced concrete (RC) is most widely used material in the construction industry. Normally natural sand is used as fine aggregate in the production of conventional concrete. Natural sand is obtained from the river bed through mining operation. To fulfill the requirement of construction industry excessive mining of sand from river bed has been carried out. It is causing threat to the natural environment. Hence, Indian government has led down restrictions …
Published in Journal of Geotechnical Engineering · Vol. 3, Issue 1, 2016 · pp. 44–50 Read article
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Soil Parameters Analysis of Al-Najaf City in Iraq: Case Study
Abstract: The soil properties are an important parameter for architectural and structural design of structures. Al-Najaf city in Iraq is a famous tourist destination, so in the last one decade a number of multistory buildings, bridges, highways, schools, hospitals, etc. have been constructed. This study investigates the properties of the soil to give a base data, which can be used for the future construction design. The physical and chemical soil properties …
Published in Journal of Geotechnical Engineering · Vol. 3, Issue 1, 2016 · pp. 56–62 Read article
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Assessing the Variation in Cutback Asphalt Requirement for Various Geotechnical Properties of Asphalt Stabilized Soil
Abstract: The subgrade layer must be strong to resist shear failure, tensile stresses and have adequate stiffness to avoid and resist excessive pavement deformation. Available fill materials do not always meet these requirements and may require improvement of their engineering properties, soil stabilization with liquid asphalt may be an alternative to improve the stability, adhesion and waterproofing properties which are desired for embankment construction purpose. The soil in this investigation represents …
Published in Journal of Geotechnical Engineering · Vol. 2, Issue 3, 2015 · pp. 17–29 Read article
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A Simulation Model to Predict the Performance of Ethanol- Gasoline Blend (E15) in a Spark Ignition Engine
Abstract: Usage of biofuels like bio-ethanol as a fuel in IC Engines is becoming prominent day by day due to their positive characteristics like biodegradability, nonpolluting, renewability, homegrown etc. Conducting experiments on real engine to establish the suitability of biofuels to IC Engines is very time consuming and expensive. Computer based simulation helps in addressing these problems. In this work an attempt is made to simulate performance and emission of SI …
Published in Journal of Industrial Safety Engineering · Vol. 7, Issue 3, 2020 · pp. 13–22 Read article
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Analysis of Natural Frequency for Three-Dimensional Model of Transformer Winding Using FEA
Abstract: AbstractPower transfer winding is prone to a number of events of a short circuit. However, over a period of time, capabilities of winding to withstand forces generated during such events decrease. In order to understand the behavior of winding at excitation, study of natural frequency is an important parameter. In this paper, winding’s radial and axial modes are studied with the help of finite element approach. Three-dimensional (3D) and two-dimensional …
Published in Journal of Instrumentation Technology & Innovations · Vol. 8, Issue 1, 2018 · pp. 8–12 Read article
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Optimization of Machining Parameters for End Milling of 1018 Mild Steel using Taguchi based Grey Relational Analysis
Abstract: The present work investigate the parametric optimization of end milling operation for 1018 mild steel with multiresponse criteria based on Taguchi approach with the Grey relational Analysis. Taguchi’s L9 orthogonal array which takes nine experimental runs was used to execute the design matrix of machining parameters. Cutting speed (CS), Feed (FD), Cutter RPM and Depth of cut (DOC) are optimized with the consideration of multiple performance characteristics namely Machining time …
Published in Journal of Mechatronics and Automation · Vol. 3, Issue 2, 2016 · pp. 36–47 Read article
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Evaluation of Process Parameters of Arc Welding for Eliminating Defects in Stainless Steel
Abstract: Arc welding is a popular metal joining process that uses a power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point. Arc welding is used in construction, automobile industry, household and domestic appliances manufacturing industry. We will do experimental investigation on the welded product of manufacturing industry and for this investigation we will choose some process parameters which …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 3, 2017 · pp. 16–19 Read article
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Effect of Isothermal Ageing on Microstructure and Mechanical Behavior of 0.5Cr-0.5Mo-0.2V Low Alloy Steel
Abstract: Cr-Mo-V based low alloy steels are widely used in thermal power plants because of their ability to withstand elevated temperature and high pressure under continuous operation. With ferrite-pearlite and/or ferrite-bainite microstructures, these steels find their applications in boiler tubes, pressure vessels and steam turbines. Being cost effective is one of the important factors, which draws attention of many industrialists towards low alloyed steels over highly alloyed steels with austenitic matrix. …
Published in Journal of Materials & Metallurgical Engineering · Vol. 5, Issue 3, 2015 · pp. 7–14 Read article
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Prediction and Optimization of Laser Transformation Hardening Parameters of Unalloyed Titanium Using RSM
Abstract: The optimization abilities in Design-expert software were used to optimize the laser phase transformation hardened bead profile parameters, i.e., to maximize hardened bead width (HBW) and to minimize, the heat input (HI), hardened depth (HD) and angle of entry of hardened bead profile (AEHB) in continuous wave (CW) Nd:YAG laser transformation hardening of unalloyed titanium sheet with 1.6 mm thickness. The mathematical models were developed from Response Surface Methodology (RSM) …
Published in Journal of Materials & Metallurgical Engineering · Vol. 5, Issue 1, 2015 · pp. 1–11 Read article
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Correlating the Damage Behaviour of Polymer Composites with the Potential Energy of the Impactor
Abstract: Design of structures using composites requires comprehensive evaluation and characterization of mechanical properties in both undamaged and damaged state. Composite laminates undergo combinations of mechanical loading resulting into microdamage accumulation in the plies. The first mode of damage is usually intralaminar cracking with the crack plane transverse to the middle plane of the laminate, spanning the whole width of the laminate. The density of cracks in a ply depends on …
Published in Journal of Materials & Metallurgical Engineering · Vol. 4, Issue 2, 2014 · pp. 1–9 Read article
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Structural, Mechanical, Electrical and Magnetic Properties of Mn–Zn Substituted Ca-hexaferrites
Abstract: In the present investigation, the samples with chemical composition Ca(CoTi)0.5(MnZn)x/2Fe11–xO19 with (x = 0 to 1.0) have been synthesized using perfect stoichiometric proportions of reacting oxides by standard ceramic technique. The pellets of 15 mm diameter were prepared and sintered at 1313 K in air atmosphere for 106 h and characterized by using XRD and SEM. XRD studies of the samples showed hexagonal magnetoplumbite (M) structure with unit cell dimensions …
Published in Journal of Materials & Metallurgical Engineering · Vol. 1, Issue 1-3, 2011 · pp. 99–111 Read article
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Synthesis and Characterization of Green Synthesized Iron Nano Particle (GInP) Using Eucalyptus globulus for Lead Removal
Abstract: The application of green synthesized iron nanoparticle for the removal of lead is researched in this study. The FT-IR and XRD results reveal that a nanoparticle with 80 nm size could be synthesized using Eucalyptus globulus leaf extract. The specific surface area of the nanoparticle was found to be 59 m2/g. The lead removal capability of the green synthesized iron nanoparticle (GInP) was investigated for lead concentration ranging from 50–250 …
Published in Journal of Materials & Metallurgical Engineering · Vol. 10, Issue 3, 2020 · pp. 20–25 Read article
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Examination of Physicochemical Parameters of Crude Oil Remediation in Soil Environment using Agro-Based Material
Abstract: In this investigation the following physicochemical parameters were monitored which include cation exchange capacity, sodium ion, carbon, magnesium, nitrogen, calcium, available phosphorus, pH, electrical conductivity, and temperature. The experimental result obtained reveals that the physicochemical parameters analyzed the reaction than the inhibiting the reaction process by inhibiting the active site of microorganisms present in each bioreactor. The research showcases, the mass and the volume of the materials used for the …
Published in Journal of Materials & Metallurgical Engineering · Vol. 13, Issue 2, 2023 · pp. 22–30 Read article
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Gallium Nitride based HEMTs in Nano-Scale Regime
Abstract: AbstractIn this work, a maximum drain current of 557 mA is achieved by the simulated structures of double-heterojunction HEMTs using the SILVACO-ATLAS software tool. The drain current is found to be higher at shorter gate length. The drain current is observed as higher at larger aluminium mole fraction. The drain current is also higher at larger thickness of AlGaN barrier layer. Again, the drain current is higher at larger doping …
Published in Journal of Microelectronics and Solid State Devices · Vol. 5, Issue 3, 2018 · pp. 11–21 Read article