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Is there any difference between supersonic and hypersonic flows other than the Mach number?

- July 31, 2020 at 1:51 pm
  
  Keyur Kanade
  Ansys Employee
  
  Is there any difference between supersonic and hypersonic flows other than the Mach number?
- July 31, 2020 at 1:52 pm
  
  Karthik Remella
  Administrator
  
  Yes! Hypersonic flows presents some physical phenomena that are not seen in supersonic flows. These phenomena become more important as the Mach number increases above 5.
  In hypersonic flows we can observe thin shock layers and the formation of thick entropy layers. Also the viscous interaction adds more complexities in the boundary layer region. Furthermore, high speed leads to high temperatures that produce ionization and dissociation of the gas around the moving body

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