But what is causing the material heating? Viscosity transferring energy from the turbulence in the unseparated flow. The turbulence itself robs energy that flows away in the [slightly] heated air.
Quote:
|
Parasitic drag is drag that acts on an object when the object is moving through a fluid. In the case of aerodynamic drag, the fluid is the atmosphere. Parasitic drag is a combination of form drag and skin friction drag.[1] Parasitic drag does not result from the generation of lift on the object, and hence it is considered parasitic.
|
en.wikipedia.org/wiki/Parasitic_drag