Blasius theorem


In fluid dynamics, Blasius theorem states that the force experienced by a two-dimensional fixed body in a steady irrotational flow is given by
and the moment about the origin experienced by the body is given by
Here,
The first formula is sometimes called Blasius–Chaplygin formula.
The theorem is named after Paul Richard Heinrich Blasius, who derived it in 1911. The Kutta–Joukowski theorem directly follows from this theorem.