Numerical Implementation of Surface Catalysis, Reaction, and Sublimation

摘要

This lecture consists of three parts: 1) quantification of rates of gas-surface interaction, 2) formulation of gas-surface balance conditions, and 3) survey of the gas-surface interaction problems in the entry flights of various planets. The first part reviews the role of surface rates and flow parameters in Goulard's theory, the catalytic rates for Martian entry problem, the reaction rates for oxidation and nitridation of carbon, rough surfaces, and the relationship between forward and reverse surface rates. The second part covers the method of expressing the diffusion flux at wall, derivation of the mass balance condition at wall, and its implementation in the boundary layer and computational-fluid-dynamics formulations. In the third part, a brief survey is made of the gas-surface interaction problems occurring in entry flights into Earth, Mars, Venus, Titan, and outer planets.