Computationally Efficient Assessments of the Effects of Radiative Transfer, Turbulence Radiation Interactions, and Finite Rate Chemistry in the Mach 20 Reentry F Flight Vehicle

Table 2

Summary of physical models employed in the simulations.

Physical models	Primary modeling option
Density	Ideal gas
Specific heat	Piecewise polynomial [29]
Thermal conductivity and mass diffusivity	Kinetic theory
Viscosity	Sutherland law
Wall boundary condition	No slip (fluid flow), constant temperature of 500 K (energy equation)
Far field boundary conditions	Gauge pressure: 2761 pascal
	Mach number: 19.97
Turbulence	Realizable
Turbulence initiation	Roughness height of 5 × 10^−4 m specified in the wall region 2.5 m to 4 m
Turbulence boundary conditions	Intensity: 0.01%
	Viscosity ratio: 2.29E − 09
Radiative transport equation solver	Finite volume radiation model (angular resolution, theta × phi: 3 × 3)
Planck mean absorption coefficient (Kp) [6]
Gas phase kinetics	Table 1
Relaxation to chemical equilibrium (kinetic mechanism for chemical time scale determination)	Table 1
Turbulence-radiation interactions	Equation (7)

These models were implemented as user-defined functions (UDFs) in ANSYS FLUENT [30].