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Full-Text Articles in Mechanical Engineering

Mathematical Modeling Of A Two Wheeled Robotic Base, Kathryn Remell May 2021

Mathematical Modeling Of A Two Wheeled Robotic Base, Kathryn Remell

Mechanical Engineering Undergraduate Honors Theses

This thesis presents the concept of using a two wheeled robot on the moon and briefly explores the requirements for successful long term operation in a lunar environment. The mathematical model for the motion of a robot with two fixed wheels on a differential drive with in a global reference frame. The robot is assumed to be balancing a platform so the mathematical model to balance the platform with wheel motors is also developed and briefly evaluated.


Development And Validation Of A Nonlinear Dynamic Model For Tuned Liquid Multiple Columns Dampers, Liang Cao, Yongqiang Gong, Filippo Ubertini, Hao Wu, An Chen, Simon Laflamme Nov 2020

Development And Validation Of A Nonlinear Dynamic Model For Tuned Liquid Multiple Columns Dampers, Liang Cao, Yongqiang Gong, Filippo Ubertini, Hao Wu, An Chen, Simon Laflamme

Civil, Construction and Environmental Engineering Publications

The tuned liquid column damper (TLCD), a passive damping device consisting of a large U-tube with oscillating liquid, has been shown to be effective at mitigating structural responses under natural hazards. Aside from their bandwidth-limited mitigation capabilities, a key limitation of TLCDs is in their large geometries that occupy large space often at prime locations. A solution is to implement multi-columned versions, termed tuned liquid multiple columns dampers (TLMCDs), which have the potential to be tuned to multiple frequencies and occupy less space by leveraging the multiple columns to allow fluid movement. However, mathematical models characterizing their dynamic behavior must ...


Effect Of Catholyte Concentration On Current Production During Chocolate Industry Wastewater Treatment By A Microbial Fuel Cell, Diana Rahayuning Wulan, Suprihanto Notodarmojo Nov 2020

Effect Of Catholyte Concentration On Current Production During Chocolate Industry Wastewater Treatment By A Microbial Fuel Cell, Diana Rahayuning Wulan, Suprihanto Notodarmojo

Makara Journal of Technology

Microbial fuel cells (MFCs) use bacteria as a catalyst to oxidize organic and/or inorganic substrates and produce electric currents. Wastewater could function as an electron donor in the anode chamber and, thus, represents a very promising energy source. Catholytes, as electron acceptors, influence power production in MFCs by increasing the availability of electrons. The present research aims to determine the influence of catholyte concentration on current production in an aerobic two-chamber MFC. Aerobic treatment was carried out in the two-chamber MFC operated in an incubator at 37  1 °C with and without aeration in the cathode chamber. Wastewater from ...


Evaluation Of Il-17a And Il-17f Gene Expression In Peripheral Blood Mononuclear Cells In Different Clinical Stages Of Chronic Hepatitis B Infection In An Iranian Population, Tannaz Akbari Kolagar, Seyed Reza Mohebbi, Fatemeh Ashrafi, Shahrzad Shoraka, Hamid Asadzadeh Aghdaei, Mohammad Reza Zali Nov 2020

Evaluation Of Il-17a And Il-17f Gene Expression In Peripheral Blood Mononuclear Cells In Different Clinical Stages Of Chronic Hepatitis B Infection In An Iranian Population, Tannaz Akbari Kolagar, Seyed Reza Mohebbi, Fatemeh Ashrafi, Shahrzad Shoraka, Hamid Asadzadeh Aghdaei, Mohammad Reza Zali

Makara Journal of Technology

Hepatitis B virus (HBV) infection is one of the main causes of liver damage, which can also lead to chronic hepatitis B (CHB) infection. More than 240 million individuals worldwide are chronic carriers of HBV. Among individuals with CHB who are untreated, approximately 15% – 40% will progress to liver cirrhosis or cancer. The interactions between HBV and host immune response play significant roles in the progression of CHB. CHB can be generally divided into four different clinical phases: immune tolerance (IT), immune clearance, inactive carrier, and Hepatitis B surface antigen (HBsAg)-negative reactivation phase (ENEG). Many studies showed that interleukins ...


Redesign Of Product Packaging With Kansei Engineering: Empirical Study On Small-Medium Enterprises In Indonesia, Amalia Suzianti, A. Aldianto Nov 2020

Redesign Of Product Packaging With Kansei Engineering: Empirical Study On Small-Medium Enterprises In Indonesia, Amalia Suzianti, A. Aldianto

Makara Journal of Technology

Small-medium enterprises (SMEs) in Indonesia have been proven to be one of the important pillars of the national economy. Unfortunately, some problems hinder their development, and one of the critical problems is the quality of product packaging. The packages of SME products are considered poor, dirty, and unattractive. Packaging problem is one of the factors why consumers are less interested in buying and why SME products always lose in the competition with other products. This study discusses how to employ Kansei engineering to design better SME product packaging with a focus on psychological (affective) aspects. This research concludes that there ...


Effect Of Landfill Leachates On Some Water Quality Indicators Of Selected Surface Water And Groundwater At Ilokun, Ado-Ekiti, Nigeria, Olorunwa Omofunmi, Adesola Satimehin, Abraham Oloye, Okwunna Umego Nov 2020

Effect Of Landfill Leachates On Some Water Quality Indicators Of Selected Surface Water And Groundwater At Ilokun, Ado-Ekiti, Nigeria, Olorunwa Omofunmi, Adesola Satimehin, Abraham Oloye, Okwunna Umego

Makara Journal of Technology

This study was conducted to examine the impact of dumpsites on the quality of groundwater and surface water. The water samples and leachates were collected from dumpsites in respective zones. The physicochemical properties of the samples were examined and determined in accordance with the standards of the American Public Health Association. Results indicated that the groundwater and surface water that are close to the dumpsites have an electrical conductivity of 385 and 245 Sd/cm, total dissolved solids of 168 and 128 mg/L, a turbidity of 4.6 and 22 NTU, a total alkalinity of 103 and 50 mg ...


Microstrip Filters: A Review Of Different Filter Designs Used In Ultrawide Band Technology, Hussain Bohra, Giriraj Prajapati Nov 2020

Microstrip Filters: A Review Of Different Filter Designs Used In Ultrawide Band Technology, Hussain Bohra, Giriraj Prajapati

Makara Journal of Technology

In this study, optimization techniques applied in designing microstrip bandpass ultra-wideband (UWB) filters are presented. Optimization based on various defected ground structure techniques, resonator designs, and type of dielectric materials is discussed. Microstrip bandpass filters implemented at UWB frequency bands used in wireless communication systems have key features to control frequency response in passband and stopband. Optimization techniques are studied to attain optimum performance of bandpass microstrip filters to ensure minimum insertion loss, high selectivity, compactness, sharp transitions at cut-off frequencies, high return loss, and excellent linearity. Extensive study shows that proper selection of fabrication techniques and type of material ...


Effect Of Pvdf-Ca Ratio On Electrospun Membrane For Water–Oil Filtration Application, Mohamad Haziq Alias, Izan Izwan Misnon, Rajan Jose Nov 2020

Effect Of Pvdf-Ca Ratio On Electrospun Membrane For Water–Oil Filtration Application, Mohamad Haziq Alias, Izan Izwan Misnon, Rajan Jose

Makara Journal of Technology

Oil spillage and generation of industrial water–oil wastewater mixture ignite a focus on filtration technology. Electrospinning technique provides a versatile route in producing tunable diameter and pores in nanofiber filtration membrane development. In this work, polyvinylidene difluoride (PVDF) and cellulose acetate (CA) electrospun membrane at different concentration ratios were synthesized for water–oil filtration application. The polymeric solutions were characterized using viscometer and conductivity testing, whereas the membranes were analyzed using contact angle, tensile test, scanning electron microscopy (SEM), and filtration testing of oil (dichloromethane). Conductivity test showed a decreased conductivity along with decrement of CA ratio in the ...


Performance-Shaping Factors Of Personnel Performing Evacuation And Escape On Offshore Installations In Tropical, Norafneeza Norazahar, Nur Azizah Arryanie Morshidi, Arshad Ahmad, Wijayanuddin Mohd Ali Nov 2020

Performance-Shaping Factors Of Personnel Performing Evacuation And Escape On Offshore Installations In Tropical, Norafneeza Norazahar, Nur Azizah Arryanie Morshidi, Arshad Ahmad, Wijayanuddin Mohd Ali

Makara Journal of Technology

Performance-shaping factors (PSFs) are used to address the strengths and weaknesses of workers performing escape and evacuation activities. These PSFs are time, environmental factors as stressors, complexity of activities, experiences and training, interaction between workers and emergency equipment, workers’ physical conditions, and procedures. This paper presents a survey work on fitness for the duty of workers performing basic offshore survival and emergency response training. The training provides credible scenarios of escape and evacuation in case of an emergency of offshore installations in tropical waters. The survey is conducted among participants of the tropical basic offshore safety induction & emergency training with ...


Comparative Study Of Energy, Utilization And Emission, Rudra Nandan Pramanik, Prafulla Kumar Sahoo Sep 2020

Comparative Study Of Energy, Utilization And Emission, Rudra Nandan Pramanik, Prafulla Kumar Sahoo

International Journal of Mechanical and Industrial Engineering

Natural or artificial energy is the first essential component for development. That is why man always tries his best for the utilization of all possible sources of energy for the fulfillment of his every day needs. Due to this reason today we are getting the most new and advanced sources of energy which compensate certain amount of energy problems due to the limitations of organic fuel sources. This project is aimed to see the different sources of energy, then for requirement how it is utilized by different conversion methods and during conversion unwanted thing comes in the form of waste ...


Mathematical Model For Manual Loading Activity In Underground Mines, V. Vidyasagar, P. N. Belkhode, J.P. Modak Sep 2020

Mathematical Model For Manual Loading Activity In Underground Mines, V. Vidyasagar, P. N. Belkhode, J.P. Modak

International Journal of Mechanical and Industrial Engineering

The paper details the approach to improve the productivity and conserving human energy in Manual loading activity. Manual loading is one of the primary activities and consumes a good amount of time for the mining crew in the underground mines. With formulation of the mathematical model, improvements in the present method of Manual loading which can conserve human energy besides increasing the productivity and reducing the time required. This mathematical model predicts the optimization of Manual loading activity. Some of the variables used to formulate this model are (1) Environment of working area, which include the ergonomic aspects; i.e ...


Integrating Biomass With Solar Stirling System For Power Generation, C.C. Ambreesh, V.C. Aravindan Sep 2020

Integrating Biomass With Solar Stirling System For Power Generation, C.C. Ambreesh, V.C. Aravindan

International Journal of Mechanical and Industrial Engineering

To cope with the increasing needs of the energy market in current scenario and protect the environment from getting depleted, there is a necessity for a power production technology to be more efficient, cost-effective and eco-friendly. Hybrid systems may provide the solution to these limitations, by maximizing the energy potential of resources, increasing the process efficiency, providing greater security of supply and reducing overall costs. This paper is a proposal to hybridize Concentrated Solar Power (CSP) stirling power plant with biomass.


Estimating The Effect Of Machining Parameters On Surface Roughness During Machining Of Hardened En24 Steel Using Coated Carbide Inserts, Sudhansu Ranjan Das, Amaresh Kumar, Debabrata Dhupal, Kali Charan Rath Sep 2020

Estimating The Effect Of Machining Parameters On Surface Roughness During Machining Of Hardened En24 Steel Using Coated Carbide Inserts, Sudhansu Ranjan Das, Amaresh Kumar, Debabrata Dhupal, Kali Charan Rath

International Journal of Mechanical and Industrial Engineering

In the present study, an attempt has been made to evaluate the performance of multilayer coated carbide inserts during dry turning of hardened EN24 steel (47 HRC). The effect of machining parameters (depth of cut, feed and cutting speed) on surface roughness parameters (Ra and Rz) were investigated by applying ANOVA. The experiments were planned based on Taguchi’s L27 Orthogonal array design. Results showed that surface roughness parameters (Ra and Rz) are mainly influenced by feed and cutting speed, whereas depth of cut exhibits minimum influence on surface roughness (Rz) and neglegible influence in case of surface roughness (Ra ...


Upgradation Of Unsaturated Polyester Resin Using Nanoclays And The Effect Of Process Variables On Mechanical Properties Of Polyester/Clay Nanocomposites, Nevil Johnson, Deviprasad Varma P.R, Manoj George, K.E George Sep 2020

Upgradation Of Unsaturated Polyester Resin Using Nanoclays And The Effect Of Process Variables On Mechanical Properties Of Polyester/Clay Nanocomposites, Nevil Johnson, Deviprasad Varma P.R, Manoj George, K.E George

International Journal of Mechanical and Industrial Engineering

This paper addresses the effects of operating variables on mechanical properties of polyester/clay nanocomposites including tensile strength, percentage elongation etc. The variables were clay type, clay content, and prepolymer–clay mixing type. The experiments were carried out based on the design of experiments using statistical methods. The nanocomposites were synthesized via in situ polymerization of polyester and clay (dissolved using styrene monomer) with Methyl-ethyl ketone peroxide (MEKP) as catalyst in Cobalt base accelerator. Unmodified Kaolinite clay and Vinyl silane modified clay are the two types of clay examined. The parameters studied, clay type and mixing method are found to ...


Comparison Of Heat Transfer Performance In Domestic Refrigerator Using Nanorefrigerant And Double Pipe Heat Exchanger, Teshome Bekele Kotu, R. Reji Kumar Sep 2020

Comparison Of Heat Transfer Performance In Domestic Refrigerator Using Nanorefrigerant And Double Pipe Heat Exchanger, Teshome Bekele Kotu, R. Reji Kumar

International Journal of Mechanical and Industrial Engineering

Convective heat transfer is very important in the HVAC, refrigeration and microelectronics cooling applications. R134a is most widely adopted alternate refrigerant in refrigeration equipment, such as domestic refrigerators and air conditioners. Though the global warming up potential of R134a is relatively high, it is affirmed that it is a long term alternate refrigerants in lots of countries. The addition of nanoparticles to the refrigerant results in improvements in the thermophysical properties and heat transfer characteristics of the refrigerant, there by improving the performance of the refrigeration system. The performance of the domestic refrigeration system with HFC134a/mineral oil system was ...


Evaluation Of Supplier Selection In Manufacturing Industries Using Grey Relational Analysis- A Case Study, Veera Bahadur Aravind Reddy K, Saras Chandra T Reddy, G. Rajyalakshmi Sep 2020

Evaluation Of Supplier Selection In Manufacturing Industries Using Grey Relational Analysis- A Case Study, Veera Bahadur Aravind Reddy K, Saras Chandra T Reddy, G. Rajyalakshmi

International Journal of Mechanical and Industrial Engineering

Selection of supplier is one of the most critical activities performed by the organizations because of its strategic importance. Over the years a number of quantitative approaches have been applied to supplier selection problems. The selection process is commonly based on their previous performance records, so the ranking determines which supplier will get their supply contract. However a survey on current evaluation methods shows that they are all less objective and lack accurate data processing. These evaluation criteria often conflict, however and it is frequently impossible to find a supplier that excels in all areas. In addition some of the ...


Cryogenic Air Conditioning Of Motor Vehicles, M. Jaivignesh, B. Vijaya Ramnath Sep 2020

Cryogenic Air Conditioning Of Motor Vehicles, M. Jaivignesh, B. Vijaya Ramnath

International Journal of Mechanical and Industrial Engineering

Cryogenics is the branch of physics and engineering that involves the study of very low temperatures (below 123 K), how to produce them, and how materials behave at those temperatures. It is frequently applied to low temperature refrigeration applications such as in the study of physical phenomena of materials at temperature approaching absolute zero and in the liquefaction of gases. Liquefied gases such as liquid nitrogen and liquid helium are used in many cryogenic applications. Using liquid nitrogen as a refrigerant reduces chloro-fluorocarbon (CFC) emission in atmosphere and it is an eco-friendly technique. This paper deals with usage of liquid ...


Design And Development Of A Alternate Mechanism For Stone Crusher Using Relative Velocity Method, Anjali J. Joshi, Jayant P. Modak Sep 2020

Design And Development Of A Alternate Mechanism For Stone Crusher Using Relative Velocity Method, Anjali J. Joshi, Jayant P. Modak

International Journal of Mechanical and Industrial Engineering

In this paper alternate mechanism for design and analysis of small size stone crusher mechanism is proposed. The basic idea is to optimize the design of the crusher which would be best suited for stone which need crushing force of 3 Tons. Presently for reducing sizes of stones from 10cm x 10cm to 2.5cm x 2.5cm in quarries is laborious job and is done manually our approach is to design a best optimum mechanism for said conditions.


Studies On Morphology, Mechanical And Optical Properties Of Pp/Hdpe/Eva/ Pla Blend Modified With Al2o3 Particles For Cast Film, Monika ., Pradeep Upadhyaya, Vijai Kumar, Navin Chand Sep 2020

Studies On Morphology, Mechanical And Optical Properties Of Pp/Hdpe/Eva/ Pla Blend Modified With Al2o3 Particles For Cast Film, Monika ., Pradeep Upadhyaya, Vijai Kumar, Navin Chand

International Journal of Mechanical and Industrial Engineering

In this present work, study of mechanical and optical properties of PP/HDPE/EVA/PLA (80/20/5/4) blend reinforced with nano alumina (Al2O3) particles is investigated. In the production process co-rotating twin screw extruder are utilized. Reinforced films are produced with 0.5, 1, 1.5 and 2 phr Al2O3 contents .The screw speed of the extruder is maintained at 150 rpm. After post extrusion, cast films are prepared. Mechanical performance analysis are done in order to examine the change in tensile strength, burst strength, tear strength and kinetic coefficient of friction of the polymeric films. Optical properties ...


Ergonomic Evaluation Of Low Cost Adjustable Workstation For Assembly Operation, Qutubuddin S. M., S.S. Hebbal, A.C.S. Kumar Sep 2020

Ergonomic Evaluation Of Low Cost Adjustable Workstation For Assembly Operation, Qutubuddin S. M., S.S. Hebbal, A.C.S. Kumar

International Journal of Mechanical and Industrial Engineering

Ergonomics is the science and technology of fitting the activities and environment to the abilities, dimensions, and needs of people to improve performance while enhancing comfort, health and safety [1] The objective of the present study was to investigate the effects of an ergonomically designed adjustable workstation for performing a repetitive industrial assembly task on operator performance and productivity. Ergonomically designed fully adjustable assembly workstations could be expensive for companies to adopt, especially the small scale industries. Therefore, a low-cost, ergonomically designed adjustable assembly workstation was designed, developed and evaluated for assembly of a product in a manufacturing company. Experiments ...


To Develop And Evaluate Impact Behavior Of Jute Fibre Reinforced Composite, A.K. M.Srivatava, Ravi Shukla, Toofan Singh, Sandeep Mishra, Rohit Kanaujiya Sep 2020

To Develop And Evaluate Impact Behavior Of Jute Fibre Reinforced Composite, A.K. M.Srivatava, Ravi Shukla, Toofan Singh, Sandeep Mishra, Rohit Kanaujiya

International Journal of Mechanical and Industrial Engineering

The objective of this study is to investigate the impact behaviors of composites, metals and water absorption of composite. The Water absorption test is used to determine the amount of water absorbed under specified conditions .These composites (JRFC) are made of natural fibre (Jute) by volume 10% reinforcing in Epoxy (Matrix) Material. The Izod impact conditions have been considered .The result shows the specific impact energy of fibre composite is higher than the other materials.


Effect Of A-Tig Welding Process Parameters On Penetration In Mild Steel Plates, Vikesh ., Jagjit Randhawa, N. M. Suri Sep 2020

Effect Of A-Tig Welding Process Parameters On Penetration In Mild Steel Plates, Vikesh ., Jagjit Randhawa, N. M. Suri

International Journal of Mechanical and Industrial Engineering

TIG welding is mostly used to weldthin sections for high surface finish. A major drawback in the processis having very small penetration as compare to other arc welding process. The problem can be avoided by using active flux in conventional TIG welding. In the present study investigate theoptimization of A-TIG welding process on mild steel for an optimal parameter by using Taguchi technique. Theeffect of various process parameters (welding current (I), welding speed (V), active flux) .IN the present study efforts were made to increase the weld penetration by appling the active flux and to optimize the process parameters.


Effect Of Nanoclay On The Mechanical Behavior Of Compatibilized Ethylene Vinyl Acetate Copolymer / High Density Polyethylene Blends, Atul Rajan, Pradeep Upadhyaya, Navin Chand, Vijai Kumar Sep 2020

Effect Of Nanoclay On The Mechanical Behavior Of Compatibilized Ethylene Vinyl Acetate Copolymer / High Density Polyethylene Blends, Atul Rajan, Pradeep Upadhyaya, Navin Chand, Vijai Kumar

International Journal of Mechanical and Industrial Engineering

This paper presents a part of research on the mechanical properties of compatibilized Poly (ethylene-co-vinyl acetate) (EVA)/ high density polyethylene (HDPE)/ organo modified montmorillonite (OMMT) nanocomposites prepared by melt mixing technique. Use of maleic anhydride grafted polyethylene (MA-g-PE) as Compatibilizer improves compatibility of EVA and HDPE. Blends containing EVA/HDPE blend with 2 phr MA-g-PE shows optimum properties. It observes that the addition of nanoclay improves the mechanical properties like tensile strength, flexural modulus, abrasion resistance and hardness of compatibilized nanocomposites systems. The morphology is studied by Scanning Electron Microscopy (SEM). The optimized properties occurrs at clay loading levels of ...


Cad Model Of Patient Specific Portal Vein For Analysis Of Liver Disorder, Yashwant Kumar Sahu, M. Anburajan Sep 2020

Cad Model Of Patient Specific Portal Vein For Analysis Of Liver Disorder, Yashwant Kumar Sahu, M. Anburajan

International Journal of Mechanical and Industrial Engineering

Recent days Computer-aided design and image processing techniques are one of the most emerging useful tools for analysis of models in various medical, industrial and research areas. In medical field for the diagnosis of various diseases in vivo techniques including biochemical test, enzymatic tests are needed for continuous monitoring of patients. These diagnosis procedures are time consuming and inconvenient for patients. Therefore Computer assisted designing and image processing techniques are most promising non invasive tools for faster diagnosis and useful tool for designing of biomedical implants. In this paper portal vein was segmented from patient’s Liver computed tomography (CT ...


Why Surface Treatment Is Must For Cold Drawing Mild Steel Tubes, Sitaram Bainsla Sep 2020

Why Surface Treatment Is Must For Cold Drawing Mild Steel Tubes, Sitaram Bainsla

International Journal of Mechanical and Industrial Engineering

Cold Draw Welded (CDW) tubes find a wide array of applications in the automobile industry. Electric Resistance Welded (ERW) tubes are surface treated with certain chemicals to make them eligible for cold drawing. The surface treatment is a time consuming process. Efforts have been directed to eliminate it altogether or at least to reduce its cycle time. We have assiduously conducted certain trials to establish the nature and character of the surface treatment. With the knowledge thus generated, we have, in our capacity, attempted to analyze why surface treatment is sine qua non to cold draw.


Classification Of Textures With And Without Rotation Angles: A Daubechies Wavelet Based Approach, Shaikhji Zaid M, J B Jadhav, V N Kapadia Sep 2020

Classification Of Textures With And Without Rotation Angles: A Daubechies Wavelet Based Approach, Shaikhji Zaid M, J B Jadhav, V N Kapadia

International Journal of Mechanical and Industrial Engineering

Textures play important roles in many image processing applications, since images of real objects often do not exhibit regions of uniform and smooth intensities, but variations of intensities with certain repeated structures or patterns, referred to as visual texture. The textural patterns or structures mainly result from the physical surface properties, such as roughness or oriented structured of a tactile quality. It is widely recognized that a visual texture, which can easily perceive, is very difficult to define. The difficulty results mainly from the fact that different people can define textures in applications dependent ways or with different perceptual motivations ...


Nanomechanical Characterization Of Indium Phosphide Epilayer Using Nanoindentation Technique, Dipika Robidas, Arunseshan C, Deepthi K. R, Arivuoli D. Sep 2020

Nanomechanical Characterization Of Indium Phosphide Epilayer Using Nanoindentation Technique, Dipika Robidas, Arunseshan C, Deepthi K. R, Arivuoli D.

International Journal of Mechanical and Industrial Engineering

The Nanomechanical characteristics of InP epilayer grown on GaAs (100) substrate is studied. The mechanical characteristics of the material such as hardness, modulus of elasticity, stiffness, contact depth etc. were studied by Nanoindentation technique with different probe geometries like Berkovich and Vickers. The results show significant variation in the mechanical parameters with respect to the tip geometry and the measured hardness values were observed to increase with the applied load.


Moisture Absorption Behavior Of Maleic Anhydride Grafted Polyethylene Modified Ethylene Vinyl Acetate Copolymer / High Density Polyethylene Nanocomposites, Atul Rajan, Pradeep Upadhyaya, Navin Chand, Vijai Kumar Sep 2020

Moisture Absorption Behavior Of Maleic Anhydride Grafted Polyethylene Modified Ethylene Vinyl Acetate Copolymer / High Density Polyethylene Nanocomposites, Atul Rajan, Pradeep Upadhyaya, Navin Chand, Vijai Kumar

International Journal of Mechanical and Industrial Engineering

The compatibilized poly ethylene vinyl acetate copolymer (EVA)/high density polyethylene (HDPE) /organomodified montmorillonite (OMMT) blend nanocomposites were prepared in a co-rotating twin-screw extruder followed by injection molding. Montmorillonite clay was modified by octadecylamine and aminopropyltriethoxysilane to make it organophilic. Maleic anhydride grafted high-density polyethylene was used as a Compatibilizer. Nanoclay was added in different proportions to the selected EVA/HDPE blend composition. The concentration of nanoclay was varied from1 to 5 phr in the polymer blend. The resulting nanocomposites were evaluated in terms of their water absorption behavior. Moisture absorption behavior of compatibilized blends is lower than their corresponding ...


“Life Prediction” For The Heat Exchanger, Simarpreet Singh Sep 2020

“Life Prediction” For The Heat Exchanger, Simarpreet Singh

International Journal of Mechanical and Industrial Engineering

Heat exchanger degradation is a non- periodic non stationary process, which depends upon the variation of parameters w.r.t time. The measurements are associated with gross errors, if they are not properly handled, they may lead to erroneous estimation and prediction of heat exchanger performance. The objective of this paper is to predict the life of the heat exchanger while reaching to its threshold limit by the output factors like cleanliness factor and fouling factor. The performance factor of heat exchangers degrades with time due to scaling or fouling factor. In this paper we have monitored, predict the working ...


Comparison Of Various Numerical Differencing Schemes In Predicting Non-Newtonian Transition Flow Through An Eccentric Annulus With Inner Cylinder In Rotation, Satish Kumar Dewangan, S.L. Sinha Sep 2020

Comparison Of Various Numerical Differencing Schemes In Predicting Non-Newtonian Transition Flow Through An Eccentric Annulus With Inner Cylinder In Rotation, Satish Kumar Dewangan, S.L. Sinha

International Journal of Mechanical and Industrial Engineering

Flow through annulus is a widely solved problem in fluid mechanics because of its practical applicability in many areas. In oil well drilling, cuttings generated are of non-Newtonian nature which flows through an eccentric annulus with inner cylinder in rotation, considering the real drilling situations. In the present work, a comparison have been done amongst three differencing schemes, the second order upwind, the Power law scheme and QUICK scheme used in computational fluid dynamics solution algorithms, so as to find the best amongst them to solve transition flow for this case as well as in general. A three dimensional orthogonal ...