The pressure distribution measured along a straight, horizontal portion of a 50-mm-diameter pipe attached to a tank is shown in the table below. Approximately how long is the entrance length? In the fully developed portion of the flow, what is the value of the wall shear stress?

Transcribed Image Text:

x (m) (0.01 m) P (mm HO) (5 mm) 0 (tank exit) 520 0.5 427 1.0 351 1.5 288 2.0 236 2.5 188 3.0 145 3.5 109 4.0 73 4.5 36 5.0 (pipe exit) 0