Question

A stagnation point is a point
1. Where the pressure is zero
2. Where the total energy is zero
3. Where the velocity of flow reduces to zero
4. Where the total energy is maximum

Answer 1

Correct Answer - Option 3 : Where the velocity of flow reduces to zero

Concept:

• A stagnation point is a point in a flow field where the local velocity of the fluid is zero.
• The Bernoulli equation shows that the static pressure is highest when the velocity is zero and hence static pressure is at its maximum value at stagnation points. Because all the velocity head is converted into the pessure head at stagnation point.
• This static pressure is called the stagnation pressure.