Section: Fluid Mechanics | Marks: 1
In a two-dimensional, incompressible and irrotational flow, stream function ( ( , ) x y ψ ψ = ) and velocity potential ( ( , ) x y φ φ = ) exist. The velocities in x and y directions are non-zero. The product of constant dy dx φ= and constant dy dx ψ= , is
- A. −1
- B. 0
- C. 1
- D. ∞
Answer: A. −1