Question

that corresponds to a Reynolds number of 20007 onml sieutn e0 pipe, what is the tlow rate Air at standard conditions flows through a 2 standard type M copper tube. What is the maximum velocity allowable for laminar flow conditions to exist? (At standard conditions, air can be treated as incompressible.) 4. One hundred cubic feet per minute of air flows through an 2 standard type M copper tube. Is the flow laminar or turbulent? 5. Pressure Drop Unknown; No Minor Losses Acetone flows at a volume flow rate of 50 gpm through a 2 nominal schedule 40 commercial steel pipe. The pipe is laid out horizontally and is 50 ft long. Calculate the pressure drop. 6.

problem # 5

Answer 1

Inside dia of 2 standard, M type copper tube, d = 2.009 in = 51.029 mm viscocity of air (mu) = 1.81 times 10^-5 pa.sec. density of air = 1.2 kg/m^3 Q = 1 ft^3/min, 1 ft^3 = 0.028316 m^3 therefore Q = 1.699 m^3/sec therefore velocity (v) = 4Q/pi d^2 = 4 times 1.699/pi times (0.051029)^2 = 830.75 m/sec R_e = svd/mu = 1.2 times 830.75 times 0.051029/1.81 times 10^-5 = 2.83 times 10^6 since R_e > 2000, so, flow is turbulent.