In practice, an inviscid flow is an laminar boundary layer.
2.
As the flow continues back from the leading edge, the laminar boundary layer increases in thickness.
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Turbulent boundary layers tend to be able to sustain an adverse pressure gradient better than an equivalent laminar boundary layer.
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In contrast, the separation resistance of a laminar boundary layer is independent of Reynolds number a somewhat counterintuitive fact.
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As the pressure begins to recover over the rear part of the wing chord, a laminar boundary layer will tend to separate from the surface.
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However, the same velocity profile which gives the laminar boundary layer its low skin friction also causes it to be badly affected by adverse pressure gradients.
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A common spoiler diffuses air by increasing amounts of turbulence flowing over the shape, " spoiling " the laminar flow and providing a cushion for the laminar boundary layer.
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*H . Schuh, On asymptotic solutions for the heat transfer at varying wall temperatures in a laminar boundary layer with Hartree s velocity profile, J . Aero.
9.
A consequence of the turbulent boundary layer is increased skin friction relative to a laminar boundary layer, but this is very small compared to the increase in drag associated with separation.
10.
Unlike the laminar boundary layer equations, the presence of two regimes governed by different sets of flow scales ( i . e . the inner and outer scaling ) has made finding a universal similarity solution for the turbulent boundary layer difficult and controversial.
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