Fluid at a uniform speed U flows into a channel between two parallel plates a distance d apart. A laminar boundary layer

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Fluid at a uniform speed U flows into a channel between twoparallel plates a distance d apart. A laminar boundary layer growson each plate. (a) At approximately what distance from the inletwill the two boundary layers first touch? (b) If the flow remainslaminar, qualitatively sketch the velocity distribution between theplates a long distance after the boundary layers meet, noting thatthe mass flow rate is constant along the channel. [(a) x/d = 0.01(Ud/v).]