Boundary layer is defined as________ .
a thin layer at the surface where
gradients of both velocity and temperature are small
a thin layer at the surface where
velocity and velocity gradients are large
a thick layer at the surface where
velocity and temperature gradients are large
a thin layer at the surface where
gradients of both velocity and temperature are large
a thin layer at the surface where
gradients of both velocity and temperature are small
The region in which flow adjusts from zero
velocity at the wall to a maximum in the main stream of the flow is termed as
boundary layer. The concept of boundary layer is of importance in all of
viscous fluid dynamics.
Hence, the correct option is (A).
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