Papers by Dr.M.Muralidhara Rao
Journal of Experimental & Applied Mechanics, Dec 13, 2017
Isogeometric analysis is a popular method for the analysis of problems involving complex geometry... more Isogeometric analysis is a popular method for the analysis of problems involving complex geometry and governed by differential equations. Meta-heuristics are widely used to determine the optimum distribution of material within the given design domain. The focus of this study is to perform isogeometric topology optimization of continuum structures using meta-heuristics nature inspired firefly algorithm. NURBS basis functions are used to construct the geometric model and to calculate the displacements as well. In this paper, a two dimensional plate structure is modeled using NURBS basis functions and analyzed for the given loading and boundary conditions. ESO technique is used to identify the elements which carry the material and penalize the remaining elements which do not carry any stress. Few examples have been solved and the results are presented. The results clearly show that the distribution of material using isogeometric analysis is similar to the distribution of material using FEA.
Parameters of microstructural investigations for novel materials
CRC Press eBooks, Apr 6, 2023
Mathematical Modelling different parameters with friction stir processing for future applications
CRC Press eBooks, Apr 6, 2023
International Journal of Oil, Gas and Coal Technology, 2010
In the present study, experiments were carried out in a single-cylinder downsized SI engine with ... more In the present study, experiments were carried out in a single-cylinder downsized SI engine with different rates of oxygen (15% to 27% by volume in the total mixture of intake gases except fuel) and equivalence ratios (from 0.45 to 1). Therefore, the oxygen volume fraction is due to oxygen enrichment or nitrogen dilution. The study of the impact of controlling the oxygen concentration on the combustion characteristics and emissions was performed at 1 400 rpm, at several loads (Indicated Mean Effective Pressure (IMEP) from 400 to 1 000 kPa). For each operation point, the spark advance and the intake pressure were adjusted simultaneously in order to maintain the load and obtain a minimum value of the indicated Specific Fuel Consumption (SFC). The effect of the oxygen concentration on the engine combustion characteristics was simulated by using the commercial software AMESim, with the combustion model developed by IFP Energies nouvelles, and an adapted algorithm was used to avoid residual gas calibration. By implementing a correlation for the laminar burning velocity, the in-cylinder pressures were perfectly predicted with a maximum pressure relative error of less than 2% for almost all the operating points. The classification of engine combustion according to the Peters-Borghi diagram, gives a deeper insight into the interaction between turbulence and the flame front.
Journal of Applied Sciences, 2012
Influence of Coolant Inlet Temperatures on The Performance of Microchannel Heat Sink for Thermal Management of Heterogeneous Integrated Systems
2022 IEEE 3rd International Conference on VLSI Systems, Architecture, Technology and Applications (VLSI SATA)
Performance Analysis of Hybrid Microchannel Heat Sink for Non-Uniform Heat Fluxes Under Laminar Flow Conditions
International Review of Mechanical Engineering-IREME, Oct 31, 2022
Experimental Investigation of Ic Engine Using Pongamia Biodiesel Blended with Cerium Oxide Nanoparticles
i-manager's Journal on Mechanical Engineering, 2021
The World is confronting with twin crisis for energy demand they are rapid depletion of fossil fu... more The World is confronting with twin crisis for energy demand they are rapid depletion of fossil fuels and increased emissions with the use of fossil fuels. Researchers all over the globe are finding an alternative for this problem. One best alterative have been identified is the use of biodiesels with the existing engine operating conditions. In this study Pongamia biodiesel is considered due to its availability in abundance at the southern parts of India. The properties of Pongamia biodiesel are in line with the diesel to use in the existing engine. The impact of engine operating conditions wise Compression ratio, Injection Pressure and Injection Timing are varied for the optimized blend of B20. The results are compared with standard engine configuration with base line fuel. The compression ratio 16, Injection Pressure 210 bar and Injection timing 21 bTDC have produced better results when compared with standard results.
Experimental investigations were carried out on a single cylinder variable compression ratio C.I ... more Experimental investigations were carried out on a single cylinder variable compression ratio C.I engine using neat Mahua oil as the fuel. Both the performance and exhaust analysis were carried out to find the best suited compression ratio. Tests have been carried out at 7 different compression ratios viz.13.2, 13.9, 14.8, 15.7, 16.9, 18.1 and 20.2. All the experiments were carried out at standard test conditions like 70 0 c cooling water temperature and at constant speed of 1500 rpm. The results shows that 15.7 is the best compression ratio with Mahua oil. All the results were obtained without any modifications on either engine side or fuel side.
The mechanical properties of in-service facilities are required to evaluate the strength of proce... more The mechanical properties of in-service facilities are required to evaluate the strength of process equipments. The purpose of this paper is to analyze the relationship between the mechanical properties and the attenuation coefficient of ultrasonic testing. For experimental tests we have selected EN-19 steel as reference. EN-19 steel is subjected to four different isothermal aging at a temperature of 700 0 C and an original specimen respectively. For these specimens tensile tests, hardness test, impact tests and ultrasonic tests were performed. Attenuation coefficients of ultrasonic testing were determined using Pulse-Echo ultrasonic test. A good analysis and estimation between mechanical properties and attenuation coefficient was found.
Global Journals of …, 2010
Experiments were carried out on a 4 stroke single cylinder diesel engine at various injection pre... more Experiments were carried out on a 4 stroke single cylinder diesel engine at various injection pressures and injection timings to find the optimum values of the same towards obtaining better performance. The selected engine is made to run at rated speed and varying loads. All the readings were taken while maintaining the cooling water exit temperature at its optimum value. The results showed a better performance with the engine at an injection pressure of 200 bar and Injection timing 110 BTDC.
Energy Conversion and Management, 2015
Plastic waste is an ideal source of energy due to its high heating value and abundance. It can be... more Plastic waste is an ideal source of energy due to its high heating value and abundance. It can be converted into oil through the pyrolysis process and utilised in internal combustion engines to produce power and heat. In the present work, plastic pyrolysis oil is manufactured via a fast pyrolysis process using a feedstock consisting of different types of plastic. The oil was analysed and it was found that its properties are similar to diesel fuel. The plastic pyrolysis oil was tested on a four-cylinder direct injection diesel engine running at various blends of plastic pyrolysis oil and diesel fuel from 0% to 100% at different engine loads from 25% to 100%. The engine combustion characteristics, performance and exhaust emissions were analysed and compared with diesel fuel operation. The results showed that the engine is able to run on plastic pyrolysis oil at high loads presenting similar performance to diesel while at lower loads the longer ignition delay period causes stability issues. The brake thermal efficiency for plastic pyrolysis oil at full load was slightly lower than diesel, but NO X emissions were considerably higher. The results suggested that the plastic pyrolysis oil is a promising alternative fuel for certain engine application at certain operation conditions.
International Journal of Scientific Research and Management
In this experiment, we evaluated different concentrations of three different chemical amendments ... more In this experiment, we evaluated different concentrations of three different chemical amendments viz, polyvinyl pyrrolidone (PVP), gum arabica, and sodium alginate for their ability to support growth and promote survival of Azotobacter vinelandii in nutrient broth during the storage. Azotobacter vinelandiiinoculated with PVP (4%) promoted highest cell population followed by gum arabica (0.5%) and sodium alginate (0.2%). The results of the present study clearly indicated that the 4% PVP probably gave higher cell population than other additives.
Energy Procedia
Ever since its inception the diesel engine has found its application in the heavy field like indu... more Ever since its inception the diesel engine has found its application in the heavy field like industrial power plants, marine propulsions, rail locomotives, trucks, tractors, buses and farm equipments. Due to their high thermal efficiency and better fuel economy now a days diesel engines are gaining much importance. Due to ever increasing need for transportation and industrial growth, the use of diesel engine has increased exponentially in the last decade. In the present context of fossil fuel crisis, the importance of alternative fuel research for Diesel engines needs no emphasis. Methyl esters of Pongamia oil can be used as alternative fuels to diesel since their properties are very close to diesel fuel, they are also renewable. In the present work, experiments have been carried out to assess the suitability of methyl esters of Pongamia Oil as fuel in a diesel engine. In the present investigation a computer based a single cylinder 4-stroke water cooled diesel engine diesel engine was used at a constant speed of 1500 rpm with eddy current dynamometer. The methyl ester of Pongamia Oil is used in the present investigation are mixed with diesel with different proportions (B00, B20, B40, B60, B80 and B100) as fuel in the diesel engine.
On increasing Markov process
Journal of Mathematics of Kyoto University, 1962
Microwave spectrum of allyl cyanide (CH2=CHCH2CN)
Can J Phys, 1968
The microwave spectrum of allyl cyanide (3-butenonitrile) was studied in the region from 8 to 26 ... more The microwave spectrum of allyl cyanide (3-butenonitrile) was studied in the region from 8 to 26 GHz. It was confirmed that this molecule exists in the two rotational isomers "cis" and "gauche". In the cis form, both a- and b-type transitions were assigned and the rotational constants in the ground vibrational state were calculated to be A = 11 323.01 + 0.08 MHz, B = 3739.20 ± 0.01 MHz, C = 2858.52 ± 0.01 MHz. The molecular dipole-moment components are μa = 3.26 ± 0.01 D, μb = 2.16 ± 0.05 D, and μt = 3.91 ± 0.03 D. For the gauche form, the a-type transitions were assigned and the rotational constants in the ground vibrational state are A = 17 295 MHz, B = 2619.91 ± 0.1 MHz, C = 2497.52 ± 0.1 MHz. The Stark effect measurement in this case gave the components of the dipole moment as μa = 3.69 ± 0.02 D, ub = 1.11 ± 0.06 D, μc = 0.98 ± 0.07 D, and μt = 3.98 ± 0.03 D.
Effect of Inlet Tangential Port Area on Droplet Size Distribution of Small-Scale Simplex Atomizer
Dispenser for storing and dispensing moistened toilet tissue
Measurement of the complex dielectric constant at 8 mm: The interferometric and standing-wave methods
Can J Phys, 1963
An interferometric method has been developed for the measurement of ε′ and ε″ at 8.3-mm wavelengt... more An interferometric method has been developed for the measurement of ε′ and ε″ at 8.3-mm wavelength. The values obtained by the method are compared with those obtained by the standing-wave method. The agreement is fair.
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Papers by Dr.M.Muralidhara Rao