Abstract
This chapter presents flow patterns, the configurations into which gas/liquid flows can arrange themselves in pipes and other geometries. Simple, mainly empirical, graphical methods for predicting the flow patterns occurring are then presented. The effect of flow patterns on heat transfer and of heat transfer on flow patterns are then considered. Models for the individual flow pattern transitions for vertical and horizontal (and near horizontal) pipes are then introduced. Important background areas such as flooding are covered. The extension of the models to annuli is also presented. Finally models for individual flow patterns are considered. In vertical flow slug and annular flow are examined. In addition, the latest material for churn flow, for which there is not a well-developed model, is presented. For horizontal flows, stratified, annular and slug flow are studied.
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References
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Azzopardi, B., Hills, J. (2003). Flow Patterns, Transitions and Models for Specific Flow Patterns. 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_1
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