UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Pressure drop and holdup predictions in horizontal oil-water flows for curved and wavy interfaces

Edomwonyi-Otu, LC; Angeli, P; (2015) Pressure drop and holdup predictions in horizontal oil-water flows for curved and wavy interfaces. Chemical Engineering Research and Design , 93 55 - 65. 10.1016/j.cherd.2014.06.009. Green open access

[thumbnail of Angeli.1-s2.0-S0263876214002664-main.pdf] PDF
Angeli.1-s2.0-S0263876214002664-main.pdf

Download (2MB)

Abstract

In this work a modified two-fluid model was developed based on experimental observations of the interface configuration in stratified liquid-liquid flows. The experimental data were obtained in a horizontal 14. mmID acrylic pipe, for test oil and water superficial velocities ranging from 0.02. m/s to 0.51. m/s and from 0.05. m/s to 0.62. m/s, respectively. Using conductance probes, average interface heights were obtained at the pipe centre and close to the pipe wall, which revealed a concave interface shape in all cases studied. A correlation between the two heights was developed that was used in the two-fluid model. In addition, from the time series of the probe signal at the pipe centre, the average wave amplitude was calculated to be 0.0005. m and was used as an equivalent roughness in the interfacial shear stress model. Both the interface shape and roughness were considered in the two-fluid model together with literature interfacial shear stress correlations. Results showed that the inclusion of both the interface curvature and the equivalent roughness in the two-fluid model improved its predictions of pressure drop and interface height over the range of studied superficial oil and water velocities. Compared to the two-fluid model with other interfacial shear stress correlations, the modified model performed better particularly for predicting pressure drop.

Type: Article
Title: Pressure drop and holdup predictions in horizontal oil-water flows for curved and wavy interfaces
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.cherd.2014.06.009
Publisher version: http://dx.doi.org/10.1016/j.cherd.2014.06.009
Additional information: Copyright © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
Keywords: Liquid–liquid flow; Curved interface; Interfacial waves; Interfacial roughness; Two-fluid model; Conductivity probes.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1462646
Downloads since deposit
130Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item