Research Publications
Permanent URI for this communityhttps://dspacenew8-imu.refread.com/handle/123456789/127
Browse
3 results
Search Results
Item Digital disruption in major ports with special reference to chennai port, kamarajar port, and tuticorin port /(Springer Nature, 2023-01-01) Kumar, S. Tarun; Sekar, M.Digitalization is the new buzzword in port environments and has become the top priority for all major ports in India. The main motivators for this ambitious strategy are the financial profits that come along, increased trade volumes, and attracting new customers. In this context, many ports are endeavoring to employ cutting-edge technologies and improve port’s efficiency. The article aims to evaluate the pre- and post-port performances after implementation of EDI and partial automation. The researcher has used secondary data from the period 2010 to 2021. Later, this data was used to develop efficiency indices like—operating surplus per employee, operating surplus per vessel, and operating surplus per 000’ tons. These indices gaged and compared the port’s performances. It was found that adopting digital technologies positively impacts port’s economics and improves its efficiency. The author used secondary data due to paucity of time. Likewise, data for the year 2021–2022 was excluded from the study as it was only partly available.Item Efficiency of port operation its influence on supply chain network design /(Research Bulletin, 2022-10-01) Sekar, M.Supply Chain Management is a very convoluted network that transports the material or product to the end users. The products are distributed through different channels. Ports integrate the supply chains with the consumption market and production market globally and regionally. Also port being an intermediary for supply chain network, the efficiency of port operation has a great influence on the movement of cargo. Port operational indices like average turnaround time of the vessel, average pre-berthing detention and average output per ship berth day have an impact on supply chain network design. The author makes an attempt to find out the most efficient port, among the major ports, based on the above indices, while keeping other indices as constant. The most efficient port may have a competitive advantage over other ports and could be a preferred port in the supply chain network.Item Numerical study on domain independency for prediction of vortex shedding parameters of a circular cylinder(Spingerlink, 2022-04-29) Chandran, Vidya; Janardhanan, Sheeja; Sekar, M.The catastrophes of history make vortex-induced vibration an extensively studied area. The response predictions of offshore and sub-sea structures have gained importance off-late ever since these have been widely used by the petroleum industry. Most of the studies have confined to the comprehension of wake characteristics and the estimation of hydrodynamic loading and shedding parameters of stationary cylinders. Computational fluid dynamics has evolved as one of the effective tools in prediction of response characteristics under vortex shedding and many researchers have studied various aspects of computations that are crucial with reasonable degree of accuracy. This paper addresses the effect of the geometrical shape of fluid domain that encompasses a marine riser during simulations. Four different shapes are analyzed using Reynolds Averaged Navier–Stokes Equation-based commercial solver, ANSYS®. All four domains have the same number of elements, mesh density, and flow Reynolds number (Re). Hydrodynamic force coefficients and frequency of shedding in each case were estimated and compared with previously published numerical and experimental results. It is observed that circular domain is the most efficient in predicting both loading and shedding characteristics with less than 10% deviation as against the theoretical results. Elliptical and square domains failed to capture the vortex shedding phenomenon. The study reveals a significant characteristic of numerical simulations on the modeling and meshing of both near-wall and wake regions.