Question

The lifting flow over circular cylinder is obtained by the combination of

• A. Uniform flow + sink + vortex
• B. Uniform flow + doublet + vortex
• C. Uniform flow + source
• D. Uniform flow + sink + source

Hint:

Understanding the superposition principle in potential flow theory is crucial for constructing complex flow fields from simpler components.

Answer 1

The Correct Option is B

Lifting flow over a circular cylinder can be modeled by combining a uniform flow with a doublet and a vortex. The doublet induces a flow that models the effect of the cylinder without circulation, while the addition of a vortex introduces a lift force, counteracting the d'Alembert's paradox in inviscid flow theory.