| Full text | |
| Author(s): |
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
|
| Affiliation: | [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 |
| Abstract | |
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 |