Multiphase flows, including liquid-liquid, gas-particle, gas droplet, liquid-particle, and bubble-liquid flows, are widely encountered in power, chemical, petroleum, food, biomedical, metallurgical, nuclear, and hydraulic engineering. Studies on phase distribution and heat or mass transfer are fundamental to give insight into the complicated principle and the application prospect.

The studies revealing the multiphase flow and heat transfer characteristics have the potential to improve the principle and model which could be more universally applicable than what has been used today, increase the accuracy of the engineering design, and even provide evidence to develop a new technology.

Even though recent studies of two-phase flow have made great progress by both means of numerical modeling and experiments, the research to probe the transient multiphase flow and more than two-phase flow phenomenon needs long-term effort and to be of more concern.

This special issue accounts of the experimental, theoretical, and numerical research work emphasizing on the contributions to the investigation of multiphase flow and heat transfer process and the application to the engineering problems, providing new perspectives to established mechanism, highlighting unsolved theoretical issues. Manuscripts submitted can range from the microscopic molecular level to the macroscopic level. Critical reviews of multiphase flow development are also considered.

Potential topics include, but are not limited to:

• Studies on the hydrodynamic and thermodynamic behavior of multiphase flow
• Development of new measurement technologies in multiphase flow field
• Prediction of flow patterns of multiphase flow by models
• Studies of mass transfer in gas-liquid or liquid-liquid dispersed system
• Development of models and computational methods of mass and heat transfer in multiphase flow
• Research on the theoretical and experimental investigation of the stability of dispersions
• Studies on the effect of additives such as surfactants on two-phase pipeline flow characteristics
• Numerical approaches and experimental observation of the interaction between bubbles or droplets dispersed in bulk phase