Читать книгу Flight Theory and Aerodynamics - Joseph R. Badick - Страница 51

Viscosity can be simply defined as the internal friction of a fluid caused by molecular attraction that makes it resist its tendency to flow. The viscosity of the air is important when discussing airflow in the region very close to the surface of an aircraft. This region is called the boundary layer. We discuss viscosity in more detail when we take up the subject of boundary layer theory.