An aniline-alcohol solution is flowing at a velocity of 3 m/s through a long, 2.5-cm-ID thin-wall tube. Steam is condensing at atmospheric pressure on the outer surface of the tube, and the tube wall temperature is 100°C. The tube is clean, and there is no thermal resistance from scale deposits on the inner surface. Using the physical properties tabulated here, estimate the heat transfer coefficient between the fluid and the pipe using Eqs. (7.61) and (7.66), and compare the results. Assume that the bulk temperature of the aniline solution is 20°C, and neglect entrance effects.

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Temp- erature Viscosity (°C) (kg/m s) 20 60 100 0.0051 0.0014 0.0006 Thermal Conductivity (W/m K) 0.173 0.169 0.164 Specific Gravity 1.03 0.98 Specific Heat (kJ/kg K) 2.09 2.22 2.34