Most standard simulators assume a calorically perfect gas—where specific heats are constant. However, at hypersonic velocities (e.g., re-entry speeds of 7.5 km/s), oxygen and nitrogen molecules vibrate, dissociate, and even ionize. The HTSim simulator incorporates:
The developers of HTSim are continually working to improve and expand the simulator's features and capabilities. Some of the future developments include: htsim simulator