Question

Blood plasma flows with a rate of 0.34 cm3/s through a tube with a diameter d = 0.15 cm and length l = 2.0 m at a temperature of 20°C. The pressure at the tube entrance is P2 = 1.90 x 104 N/m2. If the temperature of the tube and plasma reaches 31°C, what is the tube entrance pressure P2’ needed to maintain the flow rate and pressure at the tube exit constant. Consider η20°C = 1.81 mPa ·s and η31°C = 1.12 mPa ·s.

Select one:

a. P2’ = 1.84 x 104 N/m3

b. P2’ = 1.76 x 104 N/m3

c. P2’ = 1.61 x 104 N/m3

d. P2’ = 1.57 x 104 N/m3

Answer 1