1. Mathematical Model¶ 1.1. Fluid Flow 1.1.1. Viscous stress tensor 1.1.2. Diffusive flux 1.1.3. Heat flux 1.1.3.1. Conductive heat flux 1.1.3.2. Diffusive heat flux 1.1.4. Chemistry 1.1.5. Equations of State and Material properties 1.1.6. Code correspondence 1.2. Wall Degradation 1.2.1. Carbon Fiber Oxidation 1.2.2. Composite Materials