Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL ASSESSMENT OF TWO-PHASE FLOWACROSS SUDDEN EXPANSIONS AND CONTRACTIONS
Submission Author:
Gustavo Eduardo Oviedo Celis , RJ
Co-Authors:
Juliana Loureiro, Atila Pantaleão Silva Freire
Presenter: Gustavo Eduardo Oviedo Celis
doi://10.26678/ABCM.ENCIT2016.CIT2016-0672
Abstract
Local and global statistical measurements of a vertical upward two-phase flow in a ten-meter column across a sudden expansion followed by a contraction are presented. The work studies the transition of two different two-phase flow patterns through the singular accidents, specifically bubble/bubble/bubble and slug/bubble/slug transitions. The phenomenology of bubble break up and coalescence is particularly discussed. Properties and parameters of both phases, including the translational gas velocity, bubble diameter distribution, pressure drop and void fraction were characterized. The continuous phase properties were assessed through Particle Imaging Velocimetry and Laser-Doppler Velocimetry. The dispersed phase was characterized with the Shadow Sizing technique.
Keywords
Two-phase Flow, Expansion, Contraction, Two-phase Flow, Expansion, Contraction
