Repeat Prob. 8–84 assuming 

(a) The diameter of the pipe is tripled 

(b) The length of the pipe is tripled while the diameter is maintained the same.

Data from Problem 8–84

Oil at 20°C is flowing through a vertical glass funnel that consists of a 20-cm-high cylindrical reservoir and a 1-cm-diameter, 40-cm-high pipe. The funnel is always maintained full by the addition of oil from a tank. Assuming the entrance effects to be negligible, determine the flow rate of oil through the funnel and calculate the “funnel effectiveness,” which is defined as the ratio of the actual flow rate through the funnel to the maximum flow rate for the “frictionless” case.

Transcribed Image Text:

Oil 1 cm Oil T 20 cm 40 cm I