000			01901nab a2200217 4500
005			20260523200032.0
008			260224s2015 xxu ing
041			_aInglés
100	1		_aTeixeira, R.G.D. _954923
100	1		_aSecchi, A.R. _954924
100	1		_aBiscaia, E.C. Jr. _954925
245	0	0	_aTwo-Phase Flow in Pipes _bNumerical Improvements and Qualitative Analysis for a Refining Process
260			_cmayo/jun. 2015
270			_a15/09/2015 ; 15/09/2015
300			_a13 p. ; 497-510
520			_aTranscripción del resumen del autor: Two-phase flow in pipes occurs frequently in refineries, oil and gas production facilities and petrochemical units. The accurate design of such processing plants requires that numerical algorithms be combined with suitable models for predicting expected pressure drops. In performing such calculations, pressure gradients may be obtained from empirical correlations such as Beggs and Brill, and they must be integrated over the total length of the pipe segment, simultaneously with the enthalpy-gradient equation when the temperature profile is unknown. This paper proposes that the set of differential and algebraic equations involved should be solved as a Differential Algebraic Equations (DAE) System, which poses a more CPU-efficient alternative to the "marching algorithm" employed by most related work. Demonstrating the use of specific regularization functions in preventing convergence failure in calculations due to discontinuities inherent to such empirical correlations is also a key feature of this study. The developed numerical techniques are then employed to examine the sensitivity to heat-transfer parameters of the results obtained for a typical refinery two-phase flow design problem.
581			_a3
773	0		_tOil and Gas Science and Technology _g70
942			_cARTICULO _2ddc
999			_c189215 _d189215