T o d d P a t t i s t wrote:

The flow is separated when the wing is stalled, ....

So, as I said, "Blow smoke across a stalled wing and you can clearly see the
burble in the airflow over the surface."

George Patterson
Why do men's hearts beat faster, knees get weak, throats become dry,
and they think irrationally when a woman wears leather clothing?
Because she smells like a new truck.