Banca de DEFESA: Kaajal Rohini Gopie

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Kaajal Rohini Gopie
DATE: 29/09/2022
TIME: 08:30
LOCAL: Ambiente virtual TEAMS
TITLE:

A numerical methodology for assessing the hydrokinetic potential in natural channels

KEY WORDS:

Hydrokinetic Potential, Natural Channel Flow, Numerical Simulation of Turbulent Flow, Turbulence Modeling

PAGES: 115
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

In this work, a numerical methodology for evaluating the hydrokinetic potential in natural channels is presented. The methodology is validated using a meandering benchmark channel found in the literature. The benchmark channel is modeled and simulated employing CFD tools. The results from the literature are compared to results generated by three different turbulence models: the standard k-epsilon model, an anisotropic k-epsilon model and a RSM. The RSM is proven to be the most consistent and proficient at generating results similar to the literature. This development proves the proposed methodology capable of reproducing the flow in the benchmark channel. Therefore, this methodology is employed for simulating the flow in a natural channel, along with the turbulence model proven to be the most consistent and proficient in replicating the flow in the benchmark channel. As a geometric model for this phase of the research, the bathymetric data of the channel downstream of the Sefac hydroelectric facility is utilized. In order to assess the hydrokinetic potential available within this channel, areas with velocities of ≈1 m/s and a depth of ≈ 1.5 m are desired. A total of five areas are found complying to these requirements. Out of these five areas, three are found to contain the highest velocity and depth values. These areas were also studied for their turbulence levels, to prolong the lifespan of the turbines, by analyzing the occurrence of secondary currents and turbulence intensity profiles. The turbulence levels, although negligible by their value, are found to be the highest near the channel bed, where no turbines would be installed, while the secondary currents are low to none. In contemplation of evaluating the hydrokinetic potential produced yearly by these three areas, additional flow rate scenarios were simulated, representing the most frequent occurring flow rates of the year 2018. Subsequently, the velocities in the three previously selected areas were studied to the end of finding specific potential locations for installing hydrokinetic turbines. Ultimately, the three sections allow for installing a total of 24 turbines, capable of generating ≈ 70 MWh in the year of 2018.

BANKING MEMBERS:
Interno - 404142 - ANTONIO CESAR PINHO BRASIL JUNIOR
Externo à Instituição - CLAUDIO JOSE CAVALCANTE BLANCO - UFPA
Interno - 3138349 - EDGAR AMARAL SILVEIRA
Presidente - 3375759 - TAYGOARA FELAMINGO DE OLIVEIRA