In the image linked there is depicted a system which creates, using the Coandă effect, a film of gas traveling along the surface of a body. If this object was moving through air in the "up" direction on the image, could aerodynamic drag be reduced since the gas at the boundary layer of the body would have lower velocity than the free stream air (in relation to the body)?

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    $\begingroup$ Related: Will it reduce lift in proportion? $\endgroup$ – mins Dec 30 '18 at 13:46

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