Banca de DEFESA: RODRIGO VIDAL CABRAL

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RODRIGO VIDAL CABRAL
DATA : 22/12/2021
HORA: 14:00
LOCAL: Online
TÍTULO:

Two-dimensional study of turbulent flow with axially induced swirl in a cyclonic gas-liquid separation

PÁGINAS: 89
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Mecânica
SUBÁREA: Fenômenos de Transporte
ESPECIALIDADE: Mecânica dos Fluídos
RESUMO:

Swirling flow is present in nature in different engineering applications, such as combustion chambers, cyclone separators, heat exchanger intensifiers, and turbomachinery. Cyclone separators are essential in the oil and gas industry, being used both in the main production lines and to treat process wastewater for disposal. Recently, axial inlet cyclones have been preferred over tangential inlet cyclones because they are more compact. The phenomena present in the swirling flow of an axial inlet hydrocyclone is the subject of this master’s thesis investigation. From a transient, three-dimensional, axisymmetric numerical model, the turbulent single-phase flow with swirl is investigated using the commercial Ansys® Fluent software. The study domain involves the tail and the cylindrical tube. The axial, radial and tangential velocity fields, the spin number decay, the pressure field, as well as the turbulent quantities are examined for different deflection angles (45°, 63° and 72°) in order
to better understand the physical phenomena. To estimate the length of the separation region, the trajectory of a single gas particle was obtained using the Euler-Lagrange model by varying the specific mass of the gas (CH4, H2S and CO2) and the particle diameter (100µm and 1000µm). The study showed regions of recirculation downstream of the tail, where the velocities are negative near the central axis of the tube. Radial velocity is
significant only in the tail region and practically negligible in the other regions. The tangential velocity is high at the entrance of the tube and damped throughout the flow due to the viscous effect. This behavior is very well quantified by determining the spin number and the study shows that the decay is approximately exponential. The particle study shows that larger particles are easier to segregate and a separation length is estimated to
be 0.2m

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1065284 - ANDRE DAMIANI ROCHA
Membro Titular - Examinador(a) Interno ao Programa - 1985515 - ANTONIO GARRIDO GALLEGO
Membro Titular - Examinador(a) Externo ao Programa - 1744239 - CRISTINA AUTVORI TOMAZETI
Membro Suplente - Examinador(a) Interno ao Programa - 1604343 - KARL PETER BURR