Hydraulics: Reynolds and Flow - Concept and Example

Situation 3: Oil with a sp.gr of 0.85 has a kinematic viscosity of 1.243 x 10-6 m2/s. 7. How many stokes is equivalent to 1.243 x 10-6 m2/s? a. 0.001243 c. 0.1243 b. 0.01243 d. 1.243 8. What is the value of viscosity in Pa-s? a. 0.000994 c. 0.001057 b. 0.001068 d. 0.001243 9. What is the absolute viscosity in Poise? a. 0.00994 c. 0.01057 b. 0.01068 d. 0.01243 Situation 4: A fluid flow at 0.001 m3/s through a 100 mm diameter pipe. 10. Determine the velocity a. 0.042 m/s c. 0.095 m/s b. 0.064 m/s d. 0.127 m/s 11. Determine the Reynolds Number and Flow of Air: υ=1.51 10^(-5) m2/s a. 843, Turbulent c. 31361, Turbulent b. 843, Laminar d. 31361, Laminar 12. Determine the Reynolds Number and Flow of Gasoline: υ=4.06 10^(-7) m2/s a. 843, Turbulent c. 31361, Turbulent b. 843, Laminar d. 31361, Laminar Situation 5: A pipe has a diameter of 20 mm and a length of 80 m. A liquid having a kinematic viscosity of 4 x 10-5 m2/s is flowing thru the pipe at a velocity of 3m/s. ε=0.0018 13. Compute the Reynolds Number a. 1,500, Turbulent c. 3,000, Turbulent b. 1,500, Laminar d. 3,000, Laminar 14. Compute the friction factor a. 0.0427 c. 0.0213 b. 0.0671 d. 0.0667 15. Compute the head loss of the pipe a. 39.08 m c. 78.29 m b. 122.39 m d. 123.12 m Situation 6: Oil with υ= 0.000025 m2/s flows through a 50-cm ϕ pipe 100 m long at 4 m/s. ε=0.00194 16. What is the Reynolds number? a. 65,000 , Turbulent c. 80,000 , Turbulent b. 65,000 , Laminar d. 80,000 , Laminar 17. What is the friction factor? a. 0.0592 c. 0.00952 b. 0.0952 d. 0.0295 18. What is the total head loss? a. 3.88 m c. 24.14 m b. 12.04 m d. 38.82 m