Dr. Thirumalini S. received her M. E. and Ph. D. degrees in Mechanical Engineering from Coimbatore Institute of Technology.

Dr. Thirumalini received the "Women Engineers Award - 2008" from the Institution of Engineers, Tamil Nadu State Chapter. She is a member of SAE India and the Institution of Engineers (India), and a Life Member of the Indian Society for Technical Education.

Her areas of interest are Internal Combustion Engines, Combustion Modeling and Computational Fluid Dynamics. She has guided a number of undergraduate student projects on in-cylinder flow dynamics, structural analysis of thermal systems and experimental investigations on use of alternate fuels, and is currently involved in sponsored research projects from the All India Council for Technical Education (AICTE).


Publication Type: Journal Article
Year of Publication Publication Type Title
2016 Journal Article S. K. Sreekala and S. Thirumalini, “Investigation on aerodynamic noise evaluation and atte nuation in a glob e valve us ing CFD analysis”, International Journal of Multiphysics, vol. 10, pp. 43-51, 2016.[Abstract]

Noise pollution will soon become the third greatest menace to the human environment after air and water pollution. Since noise is a by-product of energy conversion, there will be increasing noise as the demand for energy for transportation, power, food, and chemicals increases. In the field of control equipment, noise produced by valves has become a focal point of attention. In this paper aerodynamic noise evaluation of a globe valve was carried out using a three dimensional Computational Fluid Dynamic technique(CFD). The results obtained from numerical analysis are compared with the experimental measurements and are found to be in good agreement. Reduction in sound pressure level was achieved by doubling the number of flow passages in the cage at full open condition and at the same operating conditions. Hence sound attenuation is established by changing the cage configuration with no change in total area of flow passage in the cage. More »»
2015 Journal Article J. Koti and S. Thirumalini, “Study of heat transfer characteristics of Al2O3/water-propylene glycol nanofluid as a coolant in an automotive radiator”, International Journal of Applied Engineering Research, vol. 10, pp. 37105-37109, 2015.[Abstract]

An experimental study on overall heat transfer performance of an automobile radiator using Al<inf>2</inf>O<inf>3</inf>/water- propylene glycol nanofluids has been conducted. Enhancement of Heat transfer in a radiator leads to a compact radiator, which in turn increases fuel efficiency and thus decreases cost. Experimental setup was developed using an automobile radiator. The effect of overall heat transfer conductance (UA) of Propylene Glycol (PG) added to water in two different proportions (80:20 and 70:30) has been studied. In addition to that, experiments are also conducted using Al<inf>2</inf>O<inf>3</inf>/water-PG nanofluids. The nanofluid is prepared by addition of 0.1% and 0.2% Al<inf>2</inf>O<inf>3</inf> nanoparticles to the 70:30 water-PG mixtures. The experiments have been conducted with a constant flow rate and with the temperatures varying form 70°C to 90°C. The study showed that there was an increase in overall heat conductance value with addition of nanoparticles to water-PG mixtures. With addition of 0.2 vol% of alumina particles there was an increase in UA by 9%. © Research India Publications.

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Publication Type: Conference Paper
Year of Publication Publication Type Title
2012 Conference Paper P. Vishnu, Ajaykrishna, R., and S. Thirumalini, “Cost effective energy solution with dual battery for plug-in hybrid electric vehicle (PHEV) in a public transportation system”, in Proceedings of the 2012 7th IEEE Conference on Industrial Electronics and Applications, ICIEA 2012, Singapore, 2012, pp. 1555-1560.[Abstract]

This paper proposes a novel method to find an effective solution for reducing the effect of environmental pollution through an efficient eco-friendly mode of public transport system. In the proposed topology a combination of dual battery powered plug-in hybrid electric vehicle (PHEV), optimizes the utilization of energy sources depending upon the vehicle riding conditions. Deep cycle NiMH battery power for steady speed driving conditions and starter lead acid battery for vehicle starting is used to significantly reduce the cost of installation as well as operation of a PHEV bus. Using series hybrid powertrain, the dependency on gasoline is minimized and hence will reduce the pollution rates drastically. Fast charging technique takes it less time than a conventional PHEV taking long hours of charging. Swappable batteries with dedicated swapping stations provide proper maintenance of battery, thus improving the battery parameters required for operating a public transport system which would be a present-day cost efficient alternative to the modern hybrid buses. © 2012 IEEE.

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