Question

A streamlined body is one for which the

• A. skin friction is zero
• B. thickness of the body is less than 1/100 of its length
• C. corners are rounded off
• D. separation occurs, if at all, at the farthest downstream part of the body

Answer 1

The correct option is D separation occurs, if at all, at the farthest downstream part of the body

(d)
A streamlined body is defined as that body whose surface coincides with the streamlines, when the body is placed in a flow. For a well streamlined body the separation occurs only at the downstream end. As such the wake in this case is very small and consequently the pressure drag is also small. Thus, the total drag on the stream lined body will be due to friction only.