In the early days of space travel, the development of thermal protection systems for re-entry was mainly based on an experimental approach for both design of materials and testing. During this period of trial and error, the concept of ablative material was discovered resulting in the ideal matter for re-entry rockets and space vehicles to isolate and protect them from hyperthermal effects of the environment. In his book, Ablative Thermal Protection Systems Modeling, Georges Duffa explains the history of ablative materials and looks into the future of its design process. The objective of this book is to develop physical skills in the key scientific areas applied to the modeling of thermal protection. Topics Discussed -Modeling based on small physics scales -Thermodynamics and transport properties -Gas Kinetics -Radiative Transfer -Physical and Chemical Reactions (both homogeneous and heterogeneous) -Fluid mechanics and turbulence on physical matter Special Features -Illustrative Tables and Figures -Additional Accompanying Software -New topics previously published on the subject