76Nxx Compressible fluids and gas dynamics, general

• 76N10 Existence, uniqueness, and regularity theory [See also 35L65, 35Q30]
  
• 76N15 Gas dynamics, general
  
• 76N20 Boundary-layer theory
  
• 76N25 Flow control and optimization
  
• 76N99 None of the above, but in this section