SENSITIVITY ANALYSIS OF A STATIONARY HEAT TRANSFER TWO-PHASE LIQUID-GAS SLUG FLOW MODEL FOR HORIZONTAL PIPES
Carlos L. Bassani1; Fernando H. G. Pereira1; Fausto A. A. Barbuto1; Rigoberto E. M. Morales1
1 NUEM/PPGEM/UTFPR
doi:10.20906/CPS/COB-2015-0827
Resumo
The two-phase slug flow pattern occurs over a wide range of gas and liquid flow rates and is frequently found in oil and gas offshore transportation operations. Due to the high complexity of this kind of multiphase flow, several experimental works attempted to model some important parameters such as the slug frequency and the elongated bubble translational velocity. The experimental correlations that arose from such works are widely used today on stationary slug flow simulators so as to provide mathematical closure to several models, as the one that will be presented here. Yet, those correlations were developed under different experimental conditions, where the pipe geometry, the fluid properties and even the measurement techniques widely affect the shape and the extrapolated accuracy of those experimental correlations. Therefore, the present work presents a sensitivity analysis of a slug flow stationary model with heat transfer for horizontal pipes in terms of the main closure parameters required. Some important parameters such as the length of the slug flow structures, the mixture temperature and the two-phase heat transfer coefficient are compared to experimental data in order to get insight into the sensitivity of each entrance parameter in the presented stationary model.
Palavras-chave: multiphase flow; slug flow; heat transfer; sensitivity analysis