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,
- is the force acting on the body,
- is the density of the fluid,
- is the contour flush around the body,
- is the complex potential,
- is the complex velocity,
- is the complex variable,
- is the real part of the complex number, and
- is the moment about the coordinate origin acting on the body.
The theorem is named after Paul Richard Heinrich Blasius, who derived it in 1911. The Kutta–Joukowski theorem directly follows from this theorem.