This present book is concerned with analytical approaches to statement and solution of problems of non-equilibrium evaporation and condensation. From analytical solutions, one is capable to understand and represent in a transparent form the principal laws, especially in the study of a new phenomenon or a process. This is why analytical methods are always employed on the first stage of mathematical modeling. Analytical solutions are also used as test models for validation of results numerical solutions. Non-equilibrium evaporation and condensation processes play an important role in a number of fundamental and applied problems: laser methods for processing of materials, depressurization of the protection cover of nuclear propulsion units, solar radiation on a comet surface, explosive boiling of superheated liquid, thermodynamic principles of superfluid helium. Analytical relations provide an adequate description of the essence of a physical phenomenon.

Introduction to the Problem.- Nonequilibrium Effects on the Phase Interface.- Approximate Kinetic Analysis of Strong Evaporation.- Semi-Empirical Model of Strong Evaporation.- Approximate Kinetic Analysis of Strong Condensation.- Linear Kinetic Analysis of Evaporation and Condensation.- Binary Schemes of Vapor Bubble Growth.- Pressure Blocking Effect in a Growing Vapor Bubble.- Evaporating Meniscus on the Interface of Three Phases.- Inetic Molecular Effects with Spheroidal State.- Solution of Special Problems of Film Condensation.- Nucleate Pool Boiling.- Heat Transfer in Superfluid Helium.- Pseudo-Boiling.- Bubble Rising in a Liquid.- Bubbles Dynamics in Liquid.- Heat Transfer to a Disperse Two-Phase Flow.- Thermal-Hydraulic Stability Analysis of Supercritical Fluid.- Heat Transfer in a Pebble Bed.