ABSTRACT
Some problems in forced convective boiling are addressed with particular reference to the annular flow regime. First, correlation approaches to critical heat flux are discussed and their inadequacies demonstrated. The importance of modelling is emphasised and more recent developments in modelling of annular flow are reviewed with particular reference to entrainment and deposition mechanisms. Here, the modelling can be applied to any annular flow but is of particular interest in critical heat flux prediction. With this as a background, the traditional understanding of forced convective boiling heat transfer is reviewed and disentient viewpoints discussed. Experiments in equilibrium annular flow are described which aim to elucidate any differences between evaporation and condensation.
