Open AccessEvaluation of Pb-Bi-Water Direct Contact Boiling Flow in a Vertical Circular Channel using Drift-Flux Model
Author(s) -
Novitrian Novitrian,
Minoru Takahashi
Publication year - 2016
Publication title -
kontribusi fisika indonesia
Language(s) - English
Resource type - Journals
ISSN - 0854-6878
DOI - 10.5614/itb.ijp.2008.19.4.1
Subject(s) - bubble , boiling , mechanics , buoyancy , two phase flow , volumetric flow rate , force balance , porosity , thermodynamics , lift (data mining) , flux (metallurgy) , surface tension , materials science , flow (mathematics) , chemistry , physics , composite material , metallurgy , computer science , data mining
The characteristics of Pb-Bi-water boiling two-phase flow were investigated in a vertical circular channel. Water was injected into Pb-Bi to circulate Pb-Bi in a loop with an effect of steam lift pump. Pb-Bi flow rates were measured and analytically estimated using balance condition between buoyancy force and pressure losses. The drift-flux model was used to determine void fraction with assumption that bubble sizes were dependent on the fluid surface tension and density ratio of Pb-Bi to steam and water mixture. The result of analysis shows that the deviation from the experimental data was less than 20%.