Question

Flow separation is due to

• A. Adverse pressure gradient
• B. Negative pressure gradient
• C. Density gradient
• D. Velocity gradient

Hint:

In designing aerodynamic surfaces, managing adverse pressure gradients through shape optimization can significantly reduce the risks of flow separation.

Answer 1

The Correct Option is A

Step 1: Define Flow Separation.
Flow separation occurs when the boundary layer detaches from the surface of a body. It commonly results in a loss of lift and an increase in drag in aerodynamic contexts.
Step 2: Identify the Cause.
An adverse pressure gradient, where pressure increases in the direction of the flow, is the primary cause of flow separation. This increase in pressure decelerates the flow, leading to boundary layer separation.