Assertion: airfoil's airflow | /r/CapableOf | involve turbulence
Facets:
value: always
type: TEMPORAL
value: next to the airfoil surface
type: LOCATION
value: in the boundary layer
type: LOCATION
Source sentences:
text: However, airflows in practical situations always involve turbulence in the boundary layer next to the airfoil surface, at least over the aft portion of the airfoil.