Question

Q4. The growth of boundary layer when the flow takes place over a smooth flat plate
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O (B) Increases with increase in free stream velocity
O (A) Increase with an increase in kinematic viscosity in both laminar and turbulent boundary layers
(C) Decrease with an increase in free stream velocity if the boundary layer is laminar only
O (D) Decrease with an increase in kinematic viscosity when boundary flow is laminar only
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Answer 1

Answer:

As the flow proceeds downstream of the flat plate the viscosity is able to slow down more and more fluid layers above the flat plate. This is what is called momentum transfer. And hence the boundary layer thickness increases as the fluid moves downstream.

Answer 2

Answer:

C) DECREASE WITH AN INCREASE IN FREE STREAM VELOCITY______________.