Question

1. (4 marks) A certain hose has a pressure drop vs flow function as follows: Po 0.2 Q2 where pressure drop (Po) is measured in psi and flow (Q) is measured in litres per minute Use EXCEL to create a table of values based on the above equation and plot the data on an EXCEL graph for values from 0 to 15 litres per minute in steps of 0.1 litres per minute. All of your formulas, tables and graphing should be done in EXCEL and all data should be clearly labeled with appropriate units. Hand in a PDF export of your EXCEL sheet showing all data and the resulting graph. 2. (3 marks) A Reynolds number (Re) of 2200 results when a fluid flows through a pipe with inside diameter D of 0.2 m. The fluid has a mass density ρ of 1110 kg/m3 and a dynamic viscosity u of 0.8 103 Pa s. a) What is the mean velocity v of the fluid in m/s? b) Is the flow laminar, turbulent or transitional? Explain the reason behind your answer 3. (3 marks) Humans may one day have a base station on the moon. Assuming that the base station has an artificially created atmospheric pressure of 1.0 times that of earth, calculate the gauge pressure (based on a pressure gauge that has been calibrated on earth) (in both kPa and psig) half way to the bottom of a tank of acetone that is 40 m deep

Answer 1

Given that

2)

density of the fluid $\dpi{100} \fn_cm \small \rho$ = 1110 kg/m^3

viscosity of the fluid $\dpi{100} \fn_cm \small \mu$ = 0.8 * 10^-3 Pa-s = 0.8 Ns/m^2

diameter of the fluid D or L = 0.2m

Reynolds number(R_e) = 2200

mean velocity V = ?

we have to calculate the mean velocity of the fluid