With emphasis on the processes involved, this text explores the latest experimental efforts in two-phase thermal control technology research and development. The author evaluates and compares different theoretical approaches, experimental results, and models, such as semi-empirical models for critical boiling heat fluxes. Coverage includes micro-scale heat and mass transfer, micro-liquid film, and vapor bubble formation technologies. The book also examines hydrodynamic boiling and vapor bubble formation mechanisms, coated surface boiling models, and other unique experimental methods that are currently in use or have potential for success.