Heavy oil slurry transportation through horizontal pipelines: Experiments and CFD simulations

被引:25
作者
Zambrano, Hector [1 ]
Sigalotti, Leonardo Di G. [2 ,3 ]
Klapp, Jaime [4 ,5 ]
Pena-Polo, Franklin [3 ]
Bencomo, Alfonso [6 ]
机构
[1] Univ Cent Venezuela, Fac Ingn, Ciencias Ingn, Apartado Postal 47750, Caracas 1041A, Venezuela
[2] Univ Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Area Fis Proc Irreversibles, Av San Pablo 180, Mexico City 02200, DF, Mexico
[3] IVIC, Ctr Fis, Apartado Postal 20632, Caracas 1020A, Venezuela
[4] Inst Nacl Invest Nucl, Dept Fis, Carretera Mexico Toluca S-N, Ocoyoacac 52750, Estado De Mexic, Mexico
[5] Ctr Invest & Estudios Avanzados CINVESTAV IPN, Dept Matemat, ABACUS Ctr Matemat Aplicadas & Computo Alto Rendi, Carretera Mexico Toluca Km 38-5, Ocoyoacac 52740, Estado De Mexic, Mexico
[6] Univ Cent Venezuela, Escuela Met & Ciencia Mat, Fac Ingn, Apartado Postal 47750, Caracas 1041A, Venezuela
关键词
Multiphase flows; Particle-laden flows; Laminar flows; Flow in pipes; Pressure drop; Computational methods in fluid dynamics; PARTICLE-SIZE DISTRIBUTION; CRITICAL VELOCITY; PRESSURE-DROP; FLOW; SOLIDS; PIPES;
D O I
10.1016/j.ijmultiphaseflow.2016.04.013
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The pressure-driven slurry flow of heavy oil in a horizontal pipe is investigated experimentally and numerically for Reynolds numbers in the range 44-805, solid concentrations by weight between 1 and 12%, and mean slurry velocities of similar to 0.2-2.3 m s(-1). A three-dimensional, algebraic slip mixture (ASM) model is used as part of the CFD software FLUENT 6.3 to obtain the numerical solutions. The results for the pressure drop are compared with experimental data of slurry prepared with de-asphalted oil as the liquid phase and asphaltic residues as the solid phase with mean particle sizes of 500 gm. Based on the experimental measurements, the critical deposition velocity for these slurries was estimated to vary from 0.171 m s(-1) (for 1% solid concentration and mean slurry velocity of 0.22 m) to 0.66 m s(-1) (for 12% concentration and mean slurry velocity of 2.3 m s(-1)). However, for the full range of mean velocities tested, the flow of these highly viscous mixtures was found to be in a homogeneous regime. The numerically predicted pressure drops are in good agreement with the experimental data with relative deviations of similar to 0.8-13%. In contrast, errors of similar to 3-24% are obtained when comparing the experimental results with the Fanning friction factor correlation. While the temperature of the circulating slurry rises with the flow rate due to viscous heating and friction of the solid particles with the pipe walls, we find that at the moderate flow velocities and efflux concentrations considered the slurry morphology is not affected by the gradual dissolution of the solid particles (asphaltenes) into the liquid phase. Other important slurry flow characteristics, such as the mean slurry friction coefficient and slurry velocity distribution, are also analyzed, which predict the homogeneous, symmetric character of the flow. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:130 / 141
页数:12
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