ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

Year 1997

• 1International Symposium on Liquid-Liquid Two Phase Flow and Transport Phenomena Antalya, Turkey, November 3-7, 1997

606 pages

Volume price - $192.00

Panagiota Angeli
Department of Chemical and Biochemical Engineering, University College London, London, UK

Geoffrey F. Hewitt
Department of Chemical Engineering & Chemical Technology, Imperial College of Science, Technology & Medicine, Prince Consort Road, London SW7 2BY UK

Two-phase liquid-liquid horizontal pipeline flow experiments were performed in order to establish whether the prewetting of the test section with one of the fluids before the actual multiphase flow would affect the pressure gradient during multiphase flow. A kerosene-type oil (with a viscosity of 1.6 mPa s) and water were used as test fluids; experiments were carried out in two 1 inch nominal bore test sections made from stainless steel and acrylic resin respectively.
Measurements were taken for a variety of mixture velocities and water volume fractions, covering the regions of partly or fully mixed flow. In general the pressure gradients were lower in the almost smooth acrylic pipe than in the rougher steel pipe. However, in both pipes prewetting with a particular phase, prior to the multiphase flow, affected the two phase pressure gradient. When the oil prewetted the test section then the pressure gradient during the oil-water flow for water in contact with the pipe wall was lower than when water prewetted the test section, a difference that was more significant at higher mixture velocities. During phase inversion though from oil to water continuous flows, which appeared at high mixture velocities, pressure gradients in a water prewetted pipe were slightly lower than in an oil prewetted pipe.

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