Water enters a 5 mm diameter and 13 m long tube at 15C with a velocity of 0 3 m s, and leaves at 45C The tube is subjected to a uniform heat flux of 2000 W m 2 on its surface The temperature of the tube surface at the exit is (a) 48 78C (b) 49 48C (c) 51 18C (d) 53 78C (e) 55 28C (For water, use k ...

Engineering
Heat And Mass Transfer Fundamentals And Applications
Water enters a 5-mm-diameter and 13-m-long tube at 15C with

Water enters a 5-mm-diameter and 13-m-long tube at 15C with a velocity of 0.3 m/s, and leaves at 45C. The

Question:

Water enters a 5-mm-diameter and 13-m-long tube at 15°C with a velocity of 0.3 m/s, and leaves at 45°C. The tube is subjected to a uniform heat flux of 2000 W/m² on its surface. The temperature of the tube surface at the exit is
(a) 48.78C

(b) 49.48C

(d) 53.78C

(e) 55.28C

(For water, use k = 0.615 W/m · K, Pr = 5.42, v = 0.801 × 10^-6 m²/s.)

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