Topic: Fluid Mechanics
Under what condition does flow separation take place?
- A. When $dp/dx>0$
- B. When $dp/dx<0$
- C. When $dp/dx=0$
- D. Not a function of dp/dx
Answer: A. When $dp/dx>0$
Explanation: Flow separation takes place under an adverse pressure gradient, which occurs when $\frac{\partial p}{\partial x} > 0$. A favourable condition with attached flow occurs when $\frac{\partial p}{\partial x} < 0$.