Question

2. (25pts) Motor oil at T=-30 deg F has a kinematic viscosity of ν=0.11ft2/s and a specific gravity of SG=0.88. (The rest of this is made up numbers and may not be indicative of actual car engine behavior) Assume that the oil flows at a velocity of V=2ft/s through a cast iron conduit within the engine block. Treat the conduit as a “best case roughness” (use smallest number for ε if needed) cast iron pipe with a diameter of 0.5in and a length of 1.5ft. Assume oil height is raised by 1ft.

a. What is the Reynolds number?

b. Is this laminar or turbulent flow?

c. What is the friction factor f? Show how you determined this by calculation or moody diagram as applicable.

d. What is the head loss in ft?

Answer #1

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