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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Slip ratio in dispersed viscous oil-water pipe flow

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Rodriguez, Iara H. [1] ; Yamaguti, Henrique K. B. [1] ; de Castro, Marcelo S. [1] ; Da Silva, Marco J. [2] ; Rodriguez, Oscar M. H. [1]
Total Authors: 5
[1] Univ Sao Paulo, Dept Mech Engn, Engn Sch Sao Carlos, BR-13566970 Sao Carlos, SP - Brazil
[2] Rossendorf eV, Forschungszentrum Dresden, Inst Safety Res, D-01314 Dresden - Germany
Total Affiliations: 2
Document type: Journal article
Source: EXPERIMENTAL THERMAL AND FLUID SCIENCE; v. 35, n. 1, p. 11-19, JAN 2011.
Web of Science Citations: 28

In this article, dispersed flow of viscous oil and water is investigated. The experimental work was performed in a 26.2-mm-i.d. 12-m-long horizontal glass pipe using water and oil (viscosity of 100 mPa s and density of 860 kg/m(3)) as test fluids. High-speed video recording and a new wire-mesh sensor based on capacitance (permittivity) measurements were used to characterize the flow. Furthermore, holdup data were obtained using quick-closing-valves technique (QCV). An interesting finding was the oil-water slip ratio greater than one for dispersed flow at high Reynolds number. Chordal phase fraction distribution diagrams and images of the holdup distribution over the pipe cross-section obtained via wire-mesh sensor indicated a significant amount of water near to the pipe wall for the three different dispersed flow patterns identified in this study: oil-in-water homogeneous dispersion (o/w H), oil-in-water non-homogeneous dispersion (o/w NH) and Dual continuous (Do/w \& Dw/o). The phase slip might be explained by the existence of a water film surrounding the homogeneous mixture of oil-in-water in a hidrofilic-oilfobic pipe. (C) 2010 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 08/06922-9 - Spatial analisys of a perturbation wave in parallel two-phase flow.
Grantee:Marcelo Souza de Castro
Support type: Scholarships in Brazil - Master