1975: Definition of Separation

• Separation will always be indicated by a singularity in the boundary layer solution (Sears & Telionis 1975).
• It will satisfy the Moore-Rott-Sears conditions. (Sears & Telionis 1975).
• Much controversy:
  • The Navier-Stokes equations are not singular.
  • The Goldstein singularity does not apply: the assumed pressure leading to MRS singularities is wrong.
  • Numerical solutions of the boundary layer show no singularity.

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