Simulação numerica de escoamento bifasicos a bolhas e pistonado usando um metodo Euleriano-Lagrangeano

AUTOR(ES)

Jose Roberto Fagundes Netto

DATA DE PUBLICAÇÃO

1993

RESUMO

A model to predict the behaviour of vertical two-phase flow regimes, such as bubbles and slug flow has been proposed, using a Lagrangian representation of the discrete phase and a Eulerian representation of the continuous phase. Each bubble is modeled individually through three equations: the mass and the momentum balance equations and the bubble position equation. The continuous phase is solved using a staggered mesh for the mass and momentum equations. Volumetric fraction and interfaces forces provide the coupling of the phase models. A computer program has been developed based on this model and it allows a statistical treatment of the results, due to the individual bubbles approach. It s possible to calculate the average and standard deviation of the bubbles heights, liquid slugs lengths, phase velocities and pressure gradient, for each pipe position. The results were checked against existing data and a reasonable agreement for the lengths was obtained. The velocities and pressure gradient show a good correlation with measured data. It was also performed a sensitive analysis to check the influence of the phases volumetric flow rates, pipe diameter and outlet pressure on the simulation results

ASSUNTO(S)

engenharia do petroleo escoamento bifasico lagrange bolhas (fisica) equações de

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