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DISPLACEMENT THICKNESS


Displacement thickness

A quantity defined by the identity

where p and Wx are the current values of the density and the longitudinal velocity component in a given cross section of the boundary layer, p1 and w1 are the values of p and Wx at the outer edge of the boundary layer in the same cross section; and y is the distance from the surface of the body immersed in the flow in the external normal direction.

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