https://doi.org/10.1051/epjconf/20134501104
Spatiotemporal Dynamic of Two-dimensional core annular flow in square channel
1 Université de Brest, LBMS EA 4325, IUT de Brest, Rue de Kergoat, 29200, Brest, France
2 Université Paul Verlaine, ICPM, 1, Bld Dominique ARAGO, F-57078, METZ Cedex, France
a e-mail: noureddine.latrache@univ-brest.fr
In this work, we study the spatiotemporal dynamics of a two-dimensional core-annular flow (CAF) in a square channel of an oil/water system. The flow rate of oil is fixed at Qo=0.19 l/s and the flow rate of water Qw is varied from 0.20 l/s to 0.46 l/s. For large values of Qw (typically Qw>0.23l/s), the CAF is unstable, and it becomes stable for low values of Qw (typically Qw<0.23l/s). The spatiotemporal diagram technique is used to determine the characteristics of the water-oil interface, namely the entry length, height, parallel length, frequency, wavenumber, phase velocity, amplitude and spatial growth rate of wave amplitudeas function of the water flow rate Qw. Theses characteristics are used to explain the pressure drop as function of the water flow rate.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
