This document discusses fluid mechanics concepts related to air flow past flat plates and the forces exerted. It provides an example problem where air at standard conditions flows past parallel and perpendicular flat plates, and asks the reader to determine lift and drag based on given pressure and shear stress distributions on the plate surfaces. It also defines kinematic viscosity as the ratio of dynamic viscosity to density.

1. Fluid Mechanics II
Lecture 8
Muhammad Usman

2. Example 5
• Air at standard conditions flows past a flat
plate as is indicated in figure. In case (a)
the plate is parallel to the upstream flow
and in case (b) it is perpendicular to the
upstream flow. If the pressure and shear
stress distributions on the surface are as
indicated (obtained either by experiment
or theory), determine the lift and drag on
the plate.

3. Prandtl/Blausis Derivation

4. Kinematic Viscosity
• The ratio of dynamic viscosity to density is
called kinematic viscosity.