Water at 20 degrees celsius with a free stream velocity of 2.0 m/s enters a passage formed by two parallel , flat rectangular plates with length of 1m and width of 5m. The flat plates are seperated by a distance d. Determine the minimum distance d for the flow in the passage to be considered fully developed for the water. (The boundary layer thickness expression
\delta/L=5/Re1/2 for laminar flow where L is the length of the plate and \delta/L=0.16/Re1/7 for turbulent flow, respectively.)