For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by (where, Q = fluid flow rate, ft3/sec.ρ = fluid density, lb/ft3.μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)
A. Di, opt = 3.9 Q0.45.ρ0.13
B. Di, opt = 3.9 Q0.45.μ0.95
C. Di, opt = 4.7 Q0.36.μ3.2ρ0.13
D. Di, opt = 3 Q0.36.μ0.88
Answer: Option A
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