Abstract
Flows of two immiscible liquids are encountered in a diverse range of processes and equipments. In particular in the petroleum industry, where mixtures of oil and water are transported in pipes over long distances. Accurate prediction of oil-water flow characteristics, such as flow pattern, water holdup and pressure gradient is important in many engineering applications. However, despite of their importance, liquid-liquid flows have not been explored to the same extent as gas-liquid flows. In fact, gas-liquid systems represent a very particular extreme of two-fluid systems characterized by low-density ratio and low viscosity ratio. In liquid-liquid systems the density difference between the phases is relatively low. However, the viscosity ratio encountered extends over a range of many orders of magnitude. Table 1.1 summarizes experimental studies reported in the literature on horizontal oil-water pipe flows, while studies on inclined and vertical systems are summarized in Table 1.2 and 1.3. (The tables can be found at the end of the end of this article before the bibliography). These tables reflect the wide range of physical properties encountered. Moreover, oils and oil-water emulsions may show a Newtonian or non-Newtonian rheological behavior. Therefore, the various concepts and results related to gas-liquid two-phase flows cannot be readily applied to liquid-liquid systems.
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Brauner, N. (2003). Liquid-Liquid Two-Phase Flow Systems. In: Bertola, V. (eds) Modelling and Experimentation in Two-Phase Flow. International Centre for Mechanical Sciences, vol 450. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2538-0_5
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DOI: https://doi.org/10.1007/978-3-7091-2538-0_5
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-20757-4
Online ISBN: 978-3-7091-2538-0
eBook Packages: Springer Book Archive