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by Balgair
2773 days ago
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https://en.wikipedia.org/wiki/Hypersonic_speed The relevant regime for astronomical entities is in above the 'high-hypersonic' and into 're-entry speeds' (uber-sonic?). These are above Mach 25. At these speeds, not only is the air no-longer considered an ideal gas, nor a two-temperature ideal gas, nor a dissociated gas (O2 and N2 become O and N along the wings), nor an ionized gas (electron temperature must now be considered), but rather a radiation dominated gas. Modeling these radiation dominant gases is very hard. As you increase the number of volumes to model, the computation load grows exponentially. |
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