Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NUMERICAL STUDY OF THE VISCOSITY INFLUENCE ON VERTICAL ASCENDANT LIQUID-GAS FLOW IN A DISTRIBUTOR
Submission Author:
Henrique Krainer Eidt , PR
Co-Authors:
Juan Pablo Ferraz Albuquerque, Carolina Cimarelli Rodrigues, Henrique Krainer Eidt, PAULO HENRIQUE DIAS DOS SANTOS, Dalton Bertoldi, Rigoberto Morales
Presenter: Henrique Krainer Eidt
doi://10.26678/ABCM.COBEM2019.COB2019-0719
Abstract
Multiphase flow occurs frequently at production of offshore petroleum and can cause several problems such as intermittent flow, hydrates deposition and severe slugging. These issues can be prevented with use of separators. However, due to their large dimensions, they use in the seabed is avoided. An alternative to reduce their sizes is to install a distribution system whereas more than one separator can be used. The purpose of the present work is to analyze numerically the effects of viscosity in the behavior of ascendant liquid-gas swirling flow inside the distribution system of a vertical separator. CFD simulations of a three-dimensional hybrid mesh were carried out at the commercial software ANSYS-CFX 2019. Numerical simulations were based on a finite volume method based on finite element with Eulerian-Eulerian two fluid and Shear Stress Transport (SST) turbulence models. A compressive discretization scheme was used to capture the liquid-gas interface. Mass flow rates at the outlets of the system were evaluated in order to estimate the distribution capacity. The results showed that the centrifugal forces in cyclonic chamber decrease with increasing viscosity. However, system distribution capacity was not influenced by liquid viscosity.
Keywords
Numerical analysis, distribution system, vertical ascendant liquid-gas flow, viscosity
