Respuesta :
In order to make up for the loss of fluid kinetic energy during the development of boundary layers, the solid boundary should be moved by a distance perpendicular to the solid boundary.
How thick is the velocity boundary layer?
The distance from the solid body to the point where the viscous flow velocity is 99% of the free stream velocity is typically used to determine the thickness of the velocity boundary layer (the surface velocity of an inviscid flow).
What is a boundary layer of velocity?
Prandtl first proposed the idea of the velocity boundary layer in 1904. The narrow area near to the wall where viscous effects predominate is the boundary layer. A sharp gradient of velocity arises adjacent to the wall as a result of the no-slip condition, which causes skin friction drag and other effects.
Do thermal and velocity boundary layers differ in thickness?
The temperature boundary layer is thicker than the velocity boundary layer if the Prandtl number is less than 1, which it is for air under typical conditions.
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