Topic: Fluid Mechanics
For irrotational fluid flow curl of velocity vector is
- A. 0
- B. > 0
- C. < 0
- D. None of these
Answer: A. 0
Explanation: In an irrotational flow, the fluid elements move and deform but do not rotate. Mathematically, this condition is expressed by stating that the curl of the velocity vector is equal to zero ($\nabla \times \vec{V} = 0$) at every point in the flow field.