Pressure distribution over a circular cylinder 
For a circular cylinder in a uniform inviscid flow (ideal fluid, potential flow), the pressure distribution is symmetric about:
In real (viscous) flow over a circular cylinder at moderate Reynolds numbers, the main reason for asymmetric pressure distribution is:
According to potential flow theory, the stagnation points on a circular cylinder are located at:
When circulation is introduced around a circular cylinder (Kutta–Joukowski theorem), the cylinder generates:
In the wake region behind a circular cylinder in real flow, the pressure is generally:
The d’Alembert’s Paradox is concerned with ____