ArunKumar M

Scopus Publications

Syngas production from aqueous phase reforming of glycerol–water mixture for compression ignition engine
Vetrivel Kumar Kandasamy, Arunkumar Munimathan, Silambarasan Rajendran, and Ratchagaraja Dhairiyasamy
SAGE Publications
Syngas produced from glycerol using aqueous phase reforming for nickel-based catalysts with different support materials were tested in a compression ignition (CI) engine. Experiments were conducted using nickel–alumina, nickel–lanthanum (NL), and nickel–ceria catalysts at 1:1, 1:2, 1:3, and 1:4 glycerol–water ratios and temperatures of 240°C, 260°C, and 280°C. The NL catalyst showed the highest syngas and hydrogen yield of 90.58% and 76.42%, respectively, at 1:3 ratio and 260°C. The optimized NL syngas and diesel were tested in a CI engine at 6 to 30 lpm flow rates. At 30 lpm flow, brake thermal efficiency increased by 3.15%, NOx emission was reduced by 21.22%, and smoke lowered significantly compared to diesel. The faster hydrogen combustion in syngas increased the heat release rate and cylinder peak pressure. CO and HC emissions increased at lower loads due to diluted combustion but reduced at higher loads. NL showed the best performance and emissions among the syngases due to higher hydrogen content. In summary, the NL syngas at 30 lpm showed great potential in CI engines by improving combustion and performance and reducing emissions.

Environmental behaviour of synthetic and natural fibre reinforced composites: A review
Arunkumar Munimathan, Kannan Muthu, Satheeshkumar Subramani, and Silambarasan Rajendran
SAGE Publications
There has been an increasing interest in natural fibre-reinforced composites as viable alternatives to typical synthetic fibre composites as a result of increased environmental consciousness, which has led to the quest for materials that are more sustainable. This review paper aims to provide a comprehensive evaluation of the environmental performance of both natural and synthetic fibre-reinforced composites by summarizing relevant information. The article begins by discussing the advantages of natural fibres. These advantages include the fact that natural fibres are eco-friendly, Natural fibre composites demonstrate a significantly reduced carbon footprint and energy usage over their entire life cycle when compared to their glass fibre-reinforced counterparts. Furthermore, the biodegradability of natural fibres provides the opportunity for end-of-life recycling or disposal options that are more ecologically benign than those for synthetic fibre composites. This is because natural fibres are biodegradable and the research acknowledges that various factors, such as the specific fibre and matrix used, and the manufacturing procedures employed, can influence the environmental performance of natural fibre composites. Additionally, further research and development to optimize their performance and ensure their widespread adoption as sustainable alternatives to traditional composite materials. Natural fibre-reinforced composites are more environmentally friendly than traditional composite materials.

Mechanical properties: Lifespan and retention forecast for jute fiber woven fabric reinforced epoxy matrix composite
Satheeshkumar Subramani, Arunkumar Munimathan, Jegan Manickam Manivannan, and Rajkumar Sivanraju
Wiley
AbstractPolymer composites bonded with natural fibers are extensively used for a range of engineering purposes. Preserving their mechanical strength and estimating their maximum service life are thus essential for efficient usage. The primary goals of this effort are to analyze and forecast the longest possible life span of composites. To do this, Fick's law and the Arrhenius principle are employed to analyze the diffusion coefficient and activation energy. Compression molding technology and a manual technique for layup were employed to make the composites reinforced with epoxy laminate and woven mats of jute fiber (JRC). Three layering patterns were used to prepare the laminated composite: 45° angle‐ply laminate [0°/+45°/0°/−45°/0°], 0° balanced laminate [0°/0°/0°/0°/0°/0°], and 30° angle‐ply laminate [0°/+30°/0°/−30°/0°]. In order to examine how aging affected the composites' mechanical properties, the materials were immersed in water for 10, 20, 30, and 40 days throughout the study. The study's conclusions showed that the composite samples' weight rose with age. It was possible to make precise predictions about strength retention by comparing the mechanical characteristics of aged (wet) and unaged composites. It was discovered that the strongest composites were those with a 45‐degree stacking pattern. The activation energy of composites with a 45° angle‐ply laminate layering pattern is maximum, according to the Arrhenius principle. Additionally, using an electron microscope with scanning capabilities (SEM), it was possible to determine the fiber matrix and the tensile cracked surface contact connection.Highlights The widespread usage of polymer composites with natural fibers in engineering applications. Preservation of mechanical strength and predicting the maximum service life of these composites show how important these materials are for engineering efficiency. Fick's rule and the Arrhenius principle are used to analyze diffusion coefficient and activation energy. Laminated composites are made using 45° angle‐ply, 0° balanced laminate, and 30° angle‐ply layering patterns. The impact of simulated aging on composite mechanical characteristics by water immersion for varied periods.

Evaluation of RCCI engine combustion, performance, and emissions using spirulina micro-algae biodiesel with methane-enriched hydrogen
Arunkumar Munimathan, Jaya Jayabalan, Manoj Kumar Shanmugam, Hasan Sh Majdi, Mohammad Asif, and Ümit Ağbulut
Elsevier BV

Cooling performance of a Li-ion cylindrical battery pack with liquid circulating pipes embedded in phase change material
Ravindra Jilte, Asif Afzal, Sher Afghan Khan, Mohammad Asif, Elumalai Perumal Venkatesan, and Arunkumar Munimathan
Elsevier BV

Enhancing solar air heater performance through pin–fin absorber plates and tailored MWCNT coatings: a comprehensive comparative analysis
R. Karthikeyan, A. R. Ravikumar, and Arunkumar Munimathan
Springer Science and Business Media LLC

Effect of fiber orientation on interlaminar shear stresses and thermproperty of sisal fiber reinforced epoxy composites
Arunkumar Subbiah, Prabha Chockalingam, Arunkumar Munimathan, and Kumaresan Mayakannan
FapUNIFESP (SciELO)

Finite element analysis of friction stir welding process to predict temperature distribution
Vijayakumar Palanivel, Pradeep Johnson, Arunkumar Munimathan, and Sundaravadivel Thondamuthur Arumugam
FapUNIFESP (SciELO)

Optimization of gas metal arc welding parameters for dissimilar steel welds: A case study on duplex stainless steel 2205 and stainless steel 316L
Veerakumar Sengottaiyan, Krishnamurthy Kasilingam, Meenakshipriya Balasubramaniam, and Arunkumar Munimathan
SAGE Publications
The significance of welded connections in steel structures necessitates precise structural designs and processing adaptations to ensure robust mechanical strength and durability. Gas metal arc welding (GMAW) employing controlled curves presents advantages over conventional methods, offering enhanced weld bead properties, improved aesthetics, and reduced thermal inputs. This research investigates the impact of GMAW parameters using controlled curves on the microstructure and geometry of welds between dissimilar structural steels—duplex stainless steel 2205 and stainless steel 316L grade 50—commonly employed in construction. The aim is to optimize the GMAW welding process with controlled curves and surface tension transfer between these dissimilar steels. Through a 23-factorial experimental design encompassing feed speed (Va), arc focus (FC), and peak-to-base amplitude (APB), the study examines welding energy, geometry, deposition efficiency, microstructure, microhardness, tensile strength, and corrosion properties. Optimal welding energy fosters refined microstructures and uniform hardness, aiding in predicting weld throat area. Higher energy levels expand the heat-affected zone and coarse grains, while lower energies escalate variability. Predictive models facilitate fine-tuning welding energy and throat area for desirable properties and penetration while minimizing disruptions. This process optimization can be achieved by employing derived equations that limit welding energy and curve parameters, striking a desired balance between cost, structural integrity, and reliability.

Mechanical behavior of sisal glass-reinforced polymer composites under tensile loading and geometric irregularities
D. Tamilvendan, A.R. Ravikumar, ArunKumar Munimathan, and M. Ganesh
SAGE Publications
The study aims to evaluate the tensile behavior of sisal glass-reinforced polymer composites with varying geometric irregularities. Composite laminates were fabricated using a hand layup technique, incorporating sisal fiber woven reinforcement and ortho-phthalic unsaturated polyester resin. The laminates, configured with 7 and 9 layers, were subjected to tensile testing with and without 6 mm and 12 mm diameter central holes and double holes spaced at 6.2 mm, 12 mm, and 48 mm intervals. The tensile tests were conducted using an electromechanical test system, and the results were analyzed to determine the ultimate tensile strength, modulus of elasticity, and failure strain for each specimen type. The findings revealed significant differences in tensile strength depending on the presence and size of the holes. Specimens with central holes exhibited a reduction in tensile strength, with the extent of strength reduction dependent on the hole diameter. Larger holes resulted in more severe stress concentrations, leading to greater strength degradation. Double-hole specimens showed similar strength reduction patterns, with closer spacing exacerbating the stress concentration effects. The residual strength ratio (RSR) for different configurations conformed to expected values for fiber-reinforced composites with circular hole-type defects. The study underscores the critical impact of geometric irregularities on the mechanical performance of sisal glass-reinforced polymer composites. These findings can guide the development of design strategies to mitigate the adverse effects of stress concentrators, thereby enhancing the reliability and durability of these materials in practical applications.

Assessment of reactive-control compression ignition engine performance and emissions using spirulina microalgae biodiesel in conjunction with methanol as low-reactive fuel
ArunKumar Munimathan, Silambarasan Rajendran, and Ümit Ağbulut
Springer Science and Business Media LLC
AbstractDue to their numerous uses and great fuel economy, diesel engines have been around for millennia. Despite these benefits, diesel engines have been found to pollute the environment severely. Most of the problems were caused by these engines' combustion processes, engine loads, and exhaust particles. The RCCI engine used in the experiment has 20% lower fuel and 80% high reactive fuel. In this research, methanol, and algae biodiesel blends with dimethyl ether acted as lower and higher reactive fuels, respectively, and these fuels were used to analyze the performance and emission in the RCCI engine. Among the 80% of high reactive fuel, blends contain different proportions of algae biodiesel and diethyl ether such as 32B, 28B4ME, 24B8ME, 20B12ME, and 16B16ME. A single-cylinder, four-stroke RCCI engine with a speed of 1500 rpm is used for the experiment. In the tests, the brake power is varied from 1 to 5 kW with an interval of 1 kW. In the results, BTE, BSFC, and EGT engine performance as well as NOX, HC, CO2, and smoke emissions. According to the experimental findings, the fuel properties of 16B16ME show a calorific value of 34.7 /MJ kg-1 and BTE shows improvement for all additive added fuel and 16B16ME shows higher BTE of 32.5% than other fuel blends, Similarly NOx emission also reduced for 628 ppm for 16B16ME than other fuel blends. Therefore 16B16ME is a suitable blend than other blends in RCCI engine based on the experimental results achieved in the present research.

An examination of evacuated tube collectors in comparison to direct flow and heat pipe for the purpose of solar water heating
Vijayakumar Palanivel and Arunkumar Munimathan
Informa UK Limited

Harvesting hydraulic energy for self-sustainable IoT flow measurement devices
Niveathasaro Vijayaregunathan, Vijayarajan Periyasamy, and Arunkumar Munimathan
Informa UK Limited

Exhaust gas recirculation in a compression-ignition engine with nano coated Al<inf>2</inf>O<inf>3</inf>-TiO<inf>2</inf> and ethanol fuel
Arunkumar Munimathan, Silambarasan Rajendran, and Karthik Raju
Elsevier BV

Environmental and chemical changes in palm oil biodiesel using homogeneous catalysts
S. Radjarejesri, Magesh Mani, Ashish Sharma, M.Arunkumar, Bipin kumar Singh, S. Kannan, G. E. Eldesoky, S. Wabaidur and S. Aftab
University of the Aegean
The production of biofuels in several nations has increased dramatically in recent decades. Their characterization necessitates the use of distinct assessment methods. A commercial diesel specimen is compared to the properties of the biodiesel using electrochemical impedance spectroscopy, linear scanning voltammetry, and open circuit potential. During the biodiesel production process using homogeneous catalysts, emissions of volatile organic compounds (VOCs) and particulate matter can occur. VOCs and particulate matter are harmful air pollutants that can have negative health impacts on humans and the environment. Here, ultrasound was employed to propel a transesterification process among palm oil and methanol. High performance liquid chromatography (HPLC) measures triglyceride conversion into biodiesel; a molar ratio of 7:1 of methanol to oil (M:O) and a reaction period of 80 minutes at 60◦C yields a 94.16% yield. There was 1g of potassium hydroxide catalyst for every 100g of oil. The open circuit potential (OCP) values for biodiesel samples were frequently below 810 mV, and the stabilization periods were less than 2 minutes, as shown by linear sweep voltammograms (LSV). In order to better understand the properties of biofuels and related materials, electrochemical impedance spectroscopy (EIS) was created and it discovered a capacitive system with a typical impedance of MΩ cm2 at low frequencies. ctrochemical impedance spectroscopy (EIS) was created and it discovered a capacitive system with a typical impedance of MΩ cm2 at low frequencies.

Extraction, performance and emission characterization of diesel engine using waste lipolytic microorganism biodiesel
University of the Aegean
In this study, milk waste water will be extracted, transformed into Lipolytic microorganism’s biodiesel (LMD) using transesterification, and tested for appropriateness as an alternative, sustainable, renewable source for IC engines. The properties of the created blends of biodiesel were investigated and compared to those of conventional diesel. The outcomes demonstrated that the fuel's fundamental characteristics are discussed with neat diesel. Investigated are the operation, combustion, and exhaust gas analysis of a test engine running on LMD. The studies involve running different biodiesel-diesel blends (B10, B20, B30, B40, B50, and B80) at varying loads (0, 25, 50, 75, and 100%) in a single-cylinder direct-injection diesel engine at a constant speed and comparing the results to the benchmark diesel. The values of break thermal efficiency(BTE) was decreased by 0.59, 0.68, 1.30 and 2.98% respectively for the blends of 10, 20, 30 and 50% of biodiesel mixing. The brake specific energy consumption (BSEC) is decreased by 0.1, 0.3, 0.44, and 0.77%. Any biodiesel-diesel combination reduces exhaust gas pollutants. At maximum load, the values of emissions like CO, HC, and smoke opacities of B30 decreased by 12.1%,3.94%, and 11% when compared to standard diesel. However, as per the analysis biodiesel of LMD is a potential alternative fuel that doesn't require significant alterations to be used in I.C engines.

Micro-Grid Renewable Energy Integration and Operational Optimization for Smart Grid Applications Using a Deep Learning
Hemlata Gangwar, Syam Machinathu Parambil Gangadharan, Leena Daniel, B. Srinivasa Kumar, P. Hariramakrishnan, G. Ramkumar, M. Arunkumar, P. Ganeshan, and Ahmad A. Ifseisi
Informa UK Limited

Utilization of Azadirachta indica biodiesel, ethanol and diesel blends for diesel engine applications with engine emission profile
T. Sathish, V. Mohanavel, M. Arunkumar, K. Rajan, Manzoore Elahi M. Soudagar, M.A. Mujtaba, Saleh H. Salmen, Sami Al Obaid, H. Fayaz, and S. Sivakumar
Elsevier BV

Performance and Emission Analysis of Waste Cooking Oil Biodiesel Mixed with Titanium Oxide Nano-Additives
Raj Kumar, M. Arunkumar, D. Priestly Shan, Pravin P. Patil, Ravi Kumar, Bharat Singh, and Velivela Lakshmikanth Chowdary
Hindawi Limited
People are using biodiesel in compression ignition engines because it is more environmentally friendly and can be used as a good alternative to diesel. There is a new technology called nanoparticles that can change the way a fuel works. Because waste cooking has a lot of oil in it, it can make biodiesel. To make biodiesel, transesterification was used to turn nonedible oil from waste cooking oil into biodiesel that could be used. Nanoparticles made of titanium oxide were studied by using scanning electron microscopy, transmission electron microscopy, as well as energy dispersive X-ray analysis, among other things. TiO2 nanoparticles are spread out in different amounts in the biodiesel blend. The dosage levels range from 25, 50, 75, and 100 ppm. Tests on how titanium nanoparticles in a waste cooking oil biodiesel blend affect a diesel engine’s performance and how it emits were conducted in this study too. At a steady speed, the engine was used when there was a lot of work to do. Tests show that the WCOME 20 TiO2 100 ppm blend worked well. With the increase in the concentration of nanoparticles, there is an increase in brake thermal efficiency and at the same time, there is a decrease in BSFC. It is also less harmful to the environment than other blends, except for NOx, which does no’t change.

Performance study on phase change material integrated solar still coupled with solar collector
T. Maridurai, S. Rajkumar, M. Arunkumar, V. Mohanavel, K. Arul, D. Madhesh, and Ram Subbiah
Elsevier BV

Synthesis of Aloe Vera-lignin Based Electrospun Air Filter

Performance and Impact of Cryogenic Pulsating Heat Pipe Using a Different Number of Turns and Helium Ga
Arunkumar Munimathan, Mohanavel Vinayagam, Prabhu Rajalingam, Ganesamoorthy Raju, and Suban Kaveripakkam
National Library of Serbia
The present work involves the development of helium based pulsating heat pipe (PHP), which containing 48 parallel tubing parts. The PHP is considered as one of the best alternatives for conducting metals and it is used for long distance heat transfer process. Their heat transfer capability and efficient thermal conductivity are the prominent properties which considered for applications. The region of the condenser was thermally sealed to the giffored mcmohanon cryo-cooler using a cooling cap of 1.49 W at 4.2 K while 1.1 W of heat are allowed to the evaporator section at a filling rate of 70%, through comparing the 48-turn PHP and 8-turn PHP, a most intense efficient thermal conductivity of 12329 W/ mK was achieved in the 48 turn PHP. The influence of no turns of warm movement execution was observed with the same operating parameters and topographical parameters. Observations revealed that the temperature variations of PHP 48-turn was significantly less than that of PHP 8-turn. It exhibited efficient thermal conductivity, high capacity heat transfer and a good dry-out temperature response. Thus PHP 48-turn of series and parallel configurations are defined as excellent system de-signs and are accessible to the PHP cryogenics framework architecture. This article has been retracted. Link to the retraction <a href="http://dx.doi.org/10.2298/TSCI220630084E">10.2298/TSCI220630084E</a>

A Comprehensive Study on IAA production by Bradyrhizobium japonicum and Bacillus subtilis and Its Effect on Vigna radiata Plant Growth
S. Kiruthika and M. Arunkumar
Agricultural Research Communication Center
Background: The use of chemical fertilizers and pesticides raises concerns about environmental pollution, health hazards and the destruction of biotic groups that support plant growth. Plant growth-promoting rhizobacteria (PGPR) thrive in the rhizosphere of plants are the auspicious alternative for these chemicals. PGPR plays a critical role in plant growth and development, along with biocontrol activities. Methods: In this present study, two effective microbes, Bradyrhizobium japonicum and Bacillus subtilis were chosen and their ability to produce Indole Acetic acid (IAA) was determined. Optimization of IAA production was carried out in different cultural conditions. Further, in-vitro studies were carried out to analyze the effect of these bacteria on the growth of Vigna radiata. Results: Our investigations showed that both organisms have the potential to produce IAA under standard conditions. IAA production is maximum when using Bradyrhizobium japonicum with the supplement of Carboxymethyl cellulose and yeast extract as C and N source, respectively. L-Tryptophan concentration has a positive effect on production. Further, the application of bacterial cultures has shown more significant improvement in plant growth in terms of root and shoot length and weight of crop material. The current findings recommend that Bradyrhizobium japonicum can be a suitable organism for application as a plant growth promoter.

Advancement of steam generation process in water tube boiler using Taguchi design of experiments
T. Sathish, V. Mohanavel, Asif Afzal, M. Arunkumar, M. Ravichandran, Sher Afghan Khan, Parvathy Rajendran, and Mohammad Asif
Elsevier BV

Influence of meteorology, mobility, air mass transport and biomass burning on PM<inf>2.5</inf> of three north Indian cities: phase-wise analysis of the COVID-19 lockdown
M. Arunkumar and S. Dhanakumar
Springer Science and Business Media LLC

ArunKumar M

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