SLIIT Conference and Symposium Proceedings
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All SLIIT faculties annually conduct international conferences and symposiums. Publications from these events are included in this collection.
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Publication Open Access Li-ion Battery Cooling - A Computational Study of Different Phase Change Material Configurations(Faculty of Engineering, 2025-09-09) Adikaram, S; Nasser, A; Vallés, C; Abeykoon, COverheating of Li-ion batteries in Electric Vehicles (EVs) degrades performance and reduces lifespan. Hence, energyefficient and reliable Battery Thermal Management Systems (BTMS) are required. This paper investigates the use of Phase Change Materials (PCMs), a passive cooling method with high heat storage capacity, for the thermal management of prismatic Li-ion battery cells in EVs. This computational study models the influence of buoyancy-driven convective flow on the PCM cooling performance, compared against thermal conduction-only models. In addition, this study investigates how convective flow influences the cooling performance with variations in cell orientation between vertical and horizontal alignments. n- Octadecane is used as the PCM, and Computational Fluid Dynamics (CFD) simulations were conducted with the Solidification and Melting model in ANSYS Fluent. A 12 mm PCM layer placed around the cell periphery reduced the centre temperature after 1800 s by 2.7 K in the vertical orientation and 3.7 K in the horizontal orientation compared to air-cooling. The effect of natural convection was more pronounced in the horizontal orientation, providing superior cooling performance relative to the vertical case. When the same PCM volume was used to fully enclose the cell, the cooling effect was further enhanced, achieving a maximum temperature reduction of 8.3 K within the first 1800 s. The findings demonstrate that natural convection significantly enhances the PCM-based cooling effectiveness, particularly in horizontally oriented cells, while thinner PCM layers with increased heat transfer area promote faster melting and improved cooling performance.Publication Open Access Simulating the Effects of Active Aerodynamics on the Suspension System of a Formula Student Race Car(Sri Lanka Institute of Information Technology, 2023-03-25) Epakande, C; Dayawansa, B; Liyanage, MActive aerodynamics is a growing topic in the automotive industry. With technological advancements at play, it has begun to spread across multiple avenues such as road vehicle ride comfort and the development of active suspension systems. However, the application of active aerodynamics in Formula cars has not been a commonly discussed topic. Furthermore, the effects of active aerodynamics on the suspension system have not been assessed for Formula Student race cars. Therefore, this study looks to obtain an understanding about how actively changing the Angles of Attack of an aerodynamic front wing and a rear wing would affect the suspension system of a Formula Student race car. The study was done by first choosing a wing profile using the XFLR5 software, modelling the front and rear wings using SolidWorks, according to the parametric guidelines of the Formula Student Competition for different angles of attack, analysing coefficients of lift and drag of the wings for each angle of attack using Ansys Workbench, and by performing full-vehicle acceleration and cornering analyses on MSC Adams Car to find how changing these coefficients affects the suspension dampers along the direction normal to the ground the vehicle travels on. This research would help understand the many forces acting on the suspension and to explore further developments in this area such as active aerodynamics in Formula Student race cars in the future.