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IMECH-IR  > 水动力学与海洋工程重点实验室(2009-2011)  > 期刊论文
Title:
Investigations of phase inversion and frictional pressure gradients in upward and downward oil–water flow in vertical pipes
Author: Xu JY(许晶禹); Li DH(李东辉); Guo J(郭军); Wu YX(吴应湘)
Source: International Journal of Multiphase Flow
Issued Date: 2010
Volume: 36, Issue:11-12, Pages:930–939
Abstract: The present study has attempted to investigate phase inversion and frictional pressure gradients during simultaneous vertical flow of oil and water two-phase through upward and downward pipes. The liquids selected were white oil (44 mPa s viscosity and 860 kg/m3 density) and water. The measurements were made for phase velocities varying from 0 to 1.24 m/s for water and from 0 to 1.87 m/s for oil, respectively. Experiments were carried either by keeping the mixture velocity constant and increasing the dispersed phase fraction or by keeping the continuous phase superficial velocity constant and increasing the dispersed phase superficial velocity. From the experimental results, it is shown that the frictional pressure gradient reaches to its lower value at the phase inversion point in this work. The points of phase inversion are always close to an input oil fraction of 0.8 for upward flow and of 0.75 for downward flow, respectively. A few models published in the literature are used to predict the phase inversion point and to compare the results with available experimental data. Suitable methods are suggested to predict the critical oil holdup at phase inversion based on the different viscosity ratio ranges. Furthermore, the frictional pressure gradient is analyzed with several suitable theoretical models according to the existing flow patterns. The analysis reveals that both the theoretical curves and the experimental data exhibit the same trend and the overall agreement of predicted values with experimental data is good, especially for a high oil fraction.
Keyword: Oil–water vertical flow ; Phase inversion ; Frictional pressure gradient ; Effective mixture viscosity
Language: 英语
Indexed Type: SCI
Corresponding Author: 许晶禹
Correspondent Email: xujingyu@imech.ac.cn
DOI: 10.1016/j.ijmultiphaseflow.2010.08.007
DOC Type: Article
WOS ID: WOS:000284388800008
ISSN: 0301-9322
Subject: 流体力学::多相流
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/42441
Appears in Collections:水动力学与海洋工程重点实验室(2009-2011)_期刊论文

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Recommended Citation:
Xu JY,Li DH,Guo J,et al. Investigations of phase inversion and frictional pressure gradients in upward and downward oil–water flow in vertical pipes[J]. International Journal of Multiphase Flow,2010-01-01,36(11-12):930–939.
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