bluuebunny/crossref_metadata_2025_split huggingface dataset:
Macro & micro-feature fabrication on external cylindrical surface using perimetric electrical discharge texturing
Authors: Shekhawat MS , Mali HS , Rathore APS 
Published: August 2019

Abstract
Machining of thin walled lesser stiff rotationally symmetric components is quite challenging. Electric discharge texturing is one among many of the material removing texture fabrication techniques. Extensive research has been performed for wire electric discharge machining by various researchers but so far very little effort has been made for electric discharge texturing on cylindrical surface. No one has attempted for texturing on thin walled cylindrical components. In the present study, preliminary trial experiment was conducted to evaluate suitability of newly developed Electric Discharge Machining technique i.e. Perimetric Electric Discharge Texturing (PEDT). A Perimetric Work Support & Drive System (PWSDS) was developed for Die sinker EDM to perform texturing on thin walled difficult to machine circular components used in aviation, automobile and heat transfer applications. Experimental setup was prepared for ENC-35 (Die sinker EDM). Trial experiment were performed at low current on Aluminium alloy (EN AW-6082-AlSi1MgMn) tube using copper electrode. Process was investigated for the effect of current and current density on MRR, surface roughness and geometrical accuracies (circularity, concentricity). The dielectric Dearomatized hydrocarbon fluid EDM100 was applied through nozzle to flush out the material removed by melting and evaporation. It was found that very small current quickly removes a very thin layer of the surface material without much damage to the base metal and improves the surface finish. The circularity is found to be dependent upon the run out accuracy of the spinning drive wheel. PEDT proves out to be most promising method of metal removing texturing technique specially for lesser stiff typical components.
Experimental studies on nucleate pool boiling heat transfer enhancement for composite nano-structure coated copper heating surface
Authors: Kumar V , Gajghate S S , Nath U , Pal A , Bhaumik S , Das S 
Published: August 2019

Abstract
The present paper is based on experimental studies on nucleate pool boiling heat transfer enhancement of different surfaces using water as a base fluid at atmospheric pressure. The test surfaces for the experiments include untreated, treated, and treated with Aluminum-silver oxide composite thin film surfaces having nano-layer thickness of 180 nm and 260 nm. The thin films are prepared on copper substrate by electron beam evaporation technique. The characterization of the heated surfaces is done by using optical surface profilometer for surface roughness and sessile drop method for contact angle measurement. The experiment is conducted in a closed boiling chamber and the heat flux is varied from 141.524 - 1244.101 kW/m2 in time steps. The enhancement of heat transfer coefficient is found as 22.8%, 17.27% and 11.81% from the 260 nm, 180 nm composite nanostructured coated and treated surfaces respectively compared to plain surface. Enhancement in nanostructured coated surfaces is found higher due to the capillary effect, increased wettability and high active nucleate site density and the increased rate of bubble frequency.
Simulation based design of Production and Multi echelon supply chain network for job shop manufacturing environment: A Case Study
Authors: Sharma Janpriy , Jayant Arvind , Tyagi Mohit 
Published: August 2019

Abstract

Purpose- This study aims to design simulation-based production and multi echelon supply chain network of gear job shop manufacturing. Design/Methodology/approach – Network design and development by ARENA Rockwell automation studio 15.1 version. Findings- Study provide solution to low productivity and improper resources utilization within plant. Research/managerial implications – This study lightened the resources effective utilization and improved productivity without changing any routing, planning and operation timings for the existing network. Helps to curb inefficiencies in multi echelon supply chain network of job shop scenario. Utility of Paper – This paper explores the real job manufacturing environment, their implications and shortcomings. Results of this study shows improvement of key parameters which strengthen supply chain efficiency.
Design, Analysis and Manufacturing of Front Sprocket of a Bicycle using Carbon Fiber Reinforced Plastics
Authors: Singh Joginder , Tyagi M R , Singh Gurpreet , Sharma Ravi Dutt 
Published: August 2019

Abstract
Sprocket is an essential part of a bicycle which converts rotating motion of the sprocket to linear movement of the bicycle. During operation, teeth of the sprocket mesh with the chain. Ride of a bicycle is a labour intensive process. Use of light materials parts in a bicycle instead of conventional materials can reduce a significant amount of weight, and rider need to apply lower force to drive it. In geared cycles, different sized sprockets are employed which incorporated a substantial amount of weight to it. Composite materials are very strong and lightweight materials. The strength to weight ratio of the composite materials is very high, and they are able to replace traditional metals and alloys in several applications. Along with strength, durability and lightweight, the use of composite material also improves the aesthetic look of the component. Carbon fibre reinforced plastic (CFRP) is a high strength composite material that is used abundantly in various industries. In this work, virtual and experimental analysis of CFRP bicycle sprocket was carried out. The attributes showed by the CFRP sprocket were compared with the traditional sprocket. The problems faced by the CFRP sprocket fitted bicycle in real life conditions is also documented.
An investigation on film cooling with a coalition of forward and backward injection
Authors: Mishra M P , Chandel S , Sahani A K , Mittal Rajat 
Published: August 2019

Abstract
Full coverage film cooling, also known as effusion cooling, is used to protect combustor liner from high temperature gases in the gas turbine. Numerical analyses are carried out to investigate and compare cooling performance of two arrangements, namely mix and opposite injections composed of forward as well as backward injection holes. Mix injection arrangement consists of rows of cooling holes injecting in alternate backward and forward directions, while in opposite injection configuration holes inject just in the opposite directions. Computational study is carried out at various velocity ratios (VR) from 0.5 to 5.0. Forward and backward injecting cooling holes, in both the configurations, are inclined at 300 with respect to mainstream. Adiabatic film cooling effectiveness is estimated along stream wise as well as lateral directions. Except front few rows of cooling passages (holes), configuration with opposite injection shows superior cooling than mix injection at high velocity ratios. Developed effusion or diffusion film layer is seen for both mix and opposite injection configurations, at high velocity ratios, but it occurs bit early for opposite injection. In opposite injection, fluctuations in cooling effectiveness along stream wise direction are higher as compared to mix injection at all velocity ratios.
Effect of post weld thermal aging (PWTA) sensitization on micro-hardness and corrosion behavior of AISI 304 weld joints
Authors: Kumar M , Babbar A , Sharma A , Shahi A S 
Published: August 2019

Abstract
In present study, investigationhas been carried outto determine the effect of different post welding thermal aging techniques on Micro-hardness and corrosion behavior of the SS-304 weld joints. The corrosion behavior is investigated in terms of the degree of sensitization.The linear weld joints are fabricated using gas tungsten arc welding using double V groove edges with an overall heat input of 5.496KJ/mm. The post weld thermal aging is carried out by heating to the 650°Ctemperature for 30 and 120 minutes of soaking duration and then normalizing it.The DLEPRtechniqueis exploited to evaluate sensitization. The results revealed that Micro-hardness studies conclude that Micro-hardness values decrease due to sensitization conditions. The corrosion studies showed that thermally aged welds for shorter duration result into lesser DOS values than the thermally aged welds for longer duration which results into higher DOS value.
The numerical analysis on the buoyancy-driven conjugate heat transfer and fluid flow under the influence of magnetic field in the cubic cavity using OpenFOAM
Authors: Singh Ranjit J. , Gohil Trushar B. 
Published: August 2019

Abstract
The influence of Lorentz force on the heat propagation in the conjugate cavity with various Rayleigh number (Ra) and Hartmann number (Ha) is explored in this study. The conjugate thermal and electromagnetic coupling is considered for the fluid-wall interface in the present analysis and includes the wall thickness within the computational domain. The computation of electric potential field and conduction heat transfer is enabled in the wall domain. The numerical code for conjugate buoyancy-driven convective flow with magnetohydrodynamics principle is developed on the open source platform OpenFOAM. The developed solver is capable to simulate steady and unsteady flows on complex geometry. The influence of thermal Rayleigh number (Ra) on the fluid flow is also investigated in this study for different Ra range. The outer vertically opposite side walls are kept isothermal and remaining outer walls are maintained as thermally insulated. The inner vertically opposite walls are kept thermally conductive and other walls of the fluid domain are maintained as insulated. The magnetic field is actuated normal to the temperature gradient in the range of Ha = 0 - 100, with corresponding Rayleigh number of Ra = 104 – 106. The enforced magnetic field on the enclosure generates the Lorentz force, which is the consequence of the interaction between electric current and magnetic field. The generated Lorentz force is responsible for the retardation in the heat and fluid flow and hence the Nusselt number.
Determination of Lemaitre damage parameters for DP590 steel using Teacher-Learner based optimization
Authors: Verma Ashwani , Saxena Ravindra K. 
Published: August 2019

Abstract
Dual phase (DP) steel is widely used in high strength applications. The components or parts some-times damage under the applied load during the production stage or the service stage. The damage behaviour of material under such loading conditions need to be analysed. The finite element analysis of the component and/or material incorporating the damage model is a useful step. The determination of parameters of the damage model envisages the application of such models into the numerical analysis. The present work proposes a model to determine the parameters of the Lemaitre damage model using the “Teacher-Learner based optimization” (TLBO) algorithm and the finite element method. The model simulates the tensile test and predicts the flow curve till fracture to determine the optimum set of parameters for the Lemaitre damage model. The proposed model incorporating uncoupled TLBO algorithm and finite element method is a general model and can be effectively employed to determine the values of the unknown parameters for the model.
Effect of material hardness, counter-face hardness and load on the tribological properties of virgin and glass filled PTFE using Taguchi Approach
Authors: Khan M Jebran , Gandotra Himanshu , Saleem S Shahid , Wani M F 
Published: August 2019

Abstract
The present paper aims at evaluating the tribological performance of virgin and glass fiber filled PTFE against different steel counterfaces to co-relate the effect of material and counterface hardness on friction and wear performance. The influence of load on friction and wear of virgin and glass fiber filled PTFE is also studied. The experiments were designed according to Taguchi’s L18 orthogonal array and conducted on a pin on disc reciprocating tribometer. Analysis of variance was used to determine the effect of various parameters on coefficient of friction and wear rate. The results revealed that the counterface hardness is the dominant factor affecting the COF and the material hardness is the dominant factor influencing the wear rate. Regression analysis was carried out to predict the outcomes of the experiments. The predicted and measured values show a good degree of proximity. Further, confirmation tests were also conducted with the random parameter combinations for validation of the regression equations. Furthermore, contour plot analysis has also been carried out to ascertain the ranges of COF and wear rate for different settings of control factors.
Numerical studies on the near wall y+ effect on heat and flow characteristics of the cross flow tube bank
Authors: Mangrulkar C K , Abraham J D , Dhoble A S 
Published: August 2019

Abstract
The use of passive mode of heat transfer enhancement are most commonly used for the performance improvement with conservation of conventional fuels. In recent times, to visualize the insight of fluid flow analysis, the numerical simulations are mostly preferred. The number of grid points present in the in the fluid domain near the wall governs the accuracy and precision of the numerical study. Hence in the present study, three different near wall grid systems are consider to evaluate its effect on Nusselt number friction factor for the staggered tube bank arrangements. It is reported that y+ as 10, insensitive to boundary layer effects at higher flow rate, while y+ as 1.0, and 0.10 are in close approximation.
Proton conducting reversible SOFC integrated in a solar thermal power generation system
Authors: Ghosh Angshuman , Roy Dibyendu , Ghosh Sudip 
Published: August 2019

Abstract
This paper proposes a novel solar thermal power generation system that employs a proton conducting reversible solid oxide fuel cell (RSOFC-H) and a hybrid photovoltaic thermal module. The photovoltaic thermal module supplies electrical power to the solid oxide fuel cell (SOFC) while operating in electrolysis mode. The stored fuel (Hydrogen), generated by electrolysis mode is utilised to generate power in fuel cell mode. Electrochemical modelling and analysis of RSOFC-H is presented in this paper. The working condition of the system is: as a solid oxide steam electrolyser (SOSE) mode during the day time and solid oxide fuel cell (SOFC) mode during night time. Performance analysis of RSOFC-H has been conducted under varying operating and design parameters, such as current density and cell temperature. In SOSE mode of operation, efficiency has been observed to be almost constant with the variation of current density and it is obtained to be 78.31%. During SOFC mode of operation, maximum efficiency obtained is to be 64.62% at cell temperature of 873K and current density of 500A/m2.
Tribological Properties of Some Fatty Acids
Authors: Kumar Vinod , Wani M.F , Mannekote Jagadeesh K. , Kailas Satish V. 
Published: August 2019

Abstract
The tribological properties of commonly available fatty acids like Palmatic acid, Oleic acid, Myristic acid, Lauric acid and Steric acid were tested. The fatty acids significantly influence the friction and wear characteristics of vegetable oils. Four ball wear test apparatus was used to carry out tribological tests by varying the normal load. Oleic acid shows the lower coefficient of friction at 100N load because due to the formation of physisorbed layer at low loads. Among the tested fatty acids the descending trend of coefficient of friction shown is as follows: Lauric acid, Myristic acid, Palmitic acid and Stearic acid. Optical microscopy was used to study the wear scar. It was found that the coefficient of friction and wear scar diameter of fatty acids are influenced by chain length, degree of saturation and polarity of fatty acids.
Performance evaluation of shock tube with helium and carbon dioxide using numerical simulation
Authors: Ananthu JP , Asok Kumar N 
Published: August 2019

Abstract
This work deals with the performance of the shock tube with helium and carbon dioxide as working fluids at different diaphragm pressure ratios using numerical simulation. A two-dimensional planar geometry of the shock tube is considered for the study. An inviscid time accurate model is developed to find the effects of diaphragm pressure ratios on the shock Mach number, temperature behind the incident and reflected shocks.. This numerical model is validated analytically as well as experimentally with air as working gas. Simulations were conducted for same and different driver/driven gas combinations with helium and carbon dioxide test gases using this model. Simulations were carried out using CFD solver FLUENT. Adaptive Mesh Refinement (AMR) technique was applied to accurately capture and resolve shock and contact discontinuities. At lower pressure ratios the different gas model is able to produce 20.4% and at higher diaphragm pressure ratios up to 33% increase in shock Mach number when compared to the similar driver-driven gas model.
System Availability Assessment and Optimization of Repairable Cooling Module of HVAC System using PSO Algorithm
Authors: Chaudhary Rajneesh , Tewari P.C. , Modgil Vikas 
Published: August 2019

Abstract
Availability is the main scopes of system execution under the explicit states of working. Any mechanical system contains subsystems orchestrated in arrangement, parallel or half and half setup of the subsystems. Along these lines, the concern for achieving higher availability in manufacturing activities has a significant role. In the proposed research work deals with numerical and simulation modeling of condenser manufacturing system along with its subsystems. These numerical equations are solved by using the Markov Model (MM) with normalizing conditions. Also, the study has attempted to present an effective tool for improving the quality of condenser manifold assembly by executing a meta-heuristic algorithm i.e. Particle Swarm Optimization (PSO). The performances of each subsystem are analyzed by its Failure Rate (FR) and Repair Rate (RR), the optimal FR and RR is achieved by the proposed PSO algorithm and its efficiency is compared with the existing algorithm.
“Optimization of Transesterification Reaction Parameters For Fish Oil Biodiesel Production: A Response Surface Methodology Approach”
Authors: Amruth E , Sudev L J 
Published: August 2019

Abstract
The Fish oil was used to produce biodiesel by transesterification reaction with methanol as a solvent in presence of a mixture of sodium hydroxide & di-sodium orthophosphate as catalyst concentrations (mixed base catalyst). The optimization of transesterification reaction parameters were done using Response Surface Methodology (RSM) tool. Three process variables were assessed viz., Methanol to Oil Ratio (MOR), Reaction Time (RT) & Reaction Temperature (RTE). To get maximum yield of fish oil biodiesel (FOB), 20 experiments were designed and conducted. A yield of 94.6% FOB was obtained during the transesterification process carried out at the optimized reaction parameters viz., 7.5:1 MOR, 45 minutes RT & 70°C RTE. Statistical analysis of the predicted model by RSM revealed a good agreement between the observed and predicted values. Present research is successful in effectively using RSM tool for optimization of transesterification reaction parameters.
Thermal prediction and experimental validation of Friction Stir Welded Aerospace Grade Aluminium Alloy
Authors: Vasanthakumar P. , Sekar K. , Jayantherababu J. 
Published: August 2019

Abstract
An integrated three-dimensional Friction Stir Welding (FSW) model with moving coordinate system is developed for aerospace grade aluminium alloy. Most of the previous researcher’s work was based on the friction or stick and slip phenomenon with material modeling. In this present study, 3D heat transfer model is developed and integrated with both friction and stick-slip phenomenon using comsol multiphysics. The experiment was conducted on aerospace grade aluminium alloy 7075 with weld specimen size of 200mm X 100mm X 3mm. The temperature was recorded during welding with the help of high-temperature computerized data acquisition system (CDAQ 9212) in order to understand the thermal history of alloy at the pre-specified location. The recorded temperature values are validated with computed values. The measured temperature values at all thermocouple location in advancing side with error between 0.63 to 5.8 %, when compared with computed temperature.
Vibrations signature analysis of whirling shaft of varying diameters operated at varying speeds
Authors: Kumar Sanjiv , Sehgal Rakesh , Singh Sanpreet 
Published: August 2019

Abstract
Vibration is a mechanical phenomenon in which oscillation occurs about equilibrium points. It is a displacement or movement in one direction and then back to again in the opposite direction. For example, the musical Instruments that may be plucked. With the passage or Era of time vibration has become major issue for the machinery and industries. Everyone knows that the vibration has some merits and demerits. But in modern technology age we can never eliminate whole vibrations in a machine. Some specific amount of vibration depending upon the quantity always remains there. This paper tries to focus on the analysis of the effects produced on the whirling shaft of different diameters while running at the different speeds. The objective of the study is to find the effect of different diameters rotating at different speeds on the amplitude and natural frequency of the shaft. Also forced vibration analysis of the shaft is done. Some parameters are also studied that are responsible for the failure of the system before breakdown, and the effect of the resonance frequency of the shaft. Using the vibscanner instrument a spectrograph is produced to the study the effects on amplitude and natural frequency of the whirling shaft. vibration factors on it. This spectrograph is transferred to computer with the help of OMNITREND to better analyze the data.
Comparative Analysis of Non-linear Periodic Response of Cross-ply and Angle-ply Laminated Composite Plates
Authors: Saood Ahmad , Khan Arshad H , Khan Ahmad A 
Published: August 2019

Abstract
Non-linear periodic response periodic response analysis of laminated structures is necessary for their optimal and safe dynamic design. The present work is intended to explore the influence of lamination scheme and fibre-orientation on the nonlinear forced vibration response of laminated plates. The analysis has been carried out using finite element. In present work, a comparative analysis of forced vibration response between cross-ply and angle-ply laminated composite plates have been explored. The effects of fiber orientation on non-linear forced vibration response characteristics have been analyzed. This finite element analysis has been done using shooting method along with continuation scheme in the time domain. The method employed is capable to get the complete stable and unstable branches past bifurcations. The dynamic behavior is explored using the temporal history of the response and phase plane plots. The method presented in the paper is computationally efficient and does not require apriori assumption on the participating modes, unlike harmonic balance and incremental harmonic balance methods.