Over the past two decades, two-phase flow and heat transfer problems associated with two-phase phenomena have been a challenge to many investigators. Two-phase flow applications are found in a wide range of engineering systems, such as nuclear and conventional power plants, evaporators of refrigeration systems and a wide vari ety of evaporative and condensive heat exchangers in the chemical industry. This publication is based on the invited lectures presented at the NATO Advanced Research Workshop on the Advances in Two-Phase Flow and Heat Transfer. The Horkshop was attended by more than 50 leading scientists and practicing engineers who work actively on two-phase flow and heat transfer research and applications in dif ferent sectors (academia, government, industry) of member countries of NATO. Some scientific leaders and experts on the subject matter from the non-NATO countries were also invited. They convened to discuss the state-of-the-art in two-phase flow and heat transfer and formulated recommendations for future research directions. To achieve these goals, invited key papers and a limited number of contributions were presented and discussed. The specific aspects of the subject were treated in depth in the panel sessions, and the unresolved problems identified. Suitable as a practical reference, these volumes incorporate a systematic approach to two-phase flow analysis.

Inhalt
A Novel Approach for the Determination of Critical Two-Phase Flow.- Plug Flow in Vertical Risers.- Flooding in Counter-Current Two-Phase Flow.- Experimental Studies of Transient Flow Reversal in an Atmospheric Pressure Water Rig.- Unbound Critical Flows and Jet Forces.- A Review of Two-Phase Flow Instabilities.- The Modeling of Density-Wave Oscillations in Boiling Water Nuclear Reactors.- The Modes of Flow Oscillation in Multi-Channel Two-Phase Flow Systems.- A Linearized Stability Analysis of Forced Vapor Flow Condensation.- A Comparison of Flooding Models for Air-Water and Steam-Water Flow.- Analysis of Reflood Phenomena by the Two-Fluid Code, FLUT.- Research in Two-Phase Flow and Heat Transfer to Assist the Management of Nuclear Reactor Accidents.- Practical Aspects of Condenser and Reboiler Design.- Boiling Heat Transfer in Compact and Finned Heat Exchangers.- Investigation of Two-Phase Flow in Steam Accumulators.- Workshop Panels.- Modelling Two-Phase System and Interfacial Transfer.- Future Research Suggestions on Boiling and Condensation.- Recommended Areas for Future Research in Two-Phase Flow and Heat Transfer Applications.- Selected Topics of Interest for Future Research in Two-Phase Flow Analyses.- Further Research Suggestions on Various Areas of Two-Phase Flow and Heat Transfer.