GATE ME 2025 ME Q51: Heat Transfer

Water enters a tube of diameter, D = 60 mm with mass flow rate of 0.01 kg s

as shown in the figure below. The inlet mean temperature is

K and the uniform heat flux at the surface of the tube is 2000 W m

. For the exit mean temperature of

K, the length of the tube, L is ________ m (rounded off to 1 decimal place).

Use the specific heat of water as 4181 J kg

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