# Q2) A long porous cylinder of 30 mm diameter is completely wetted by water at 34°C....

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Q2) A long porous cylinder of 30 mm diameter is completely wetted by water at 34°C. Atmospheric air at 20°C and 50% relative humidity flows over the cylinder at a velocity of 20 m/s in a large radiant furnace whose walls are kept at 60°C. a. Find the convective heat and mass transfer coefficients over the porous cylinder, b. Calculate the rate of change of temperature of porous cylinder at the instant it is exposed to above mentioned conditions For porous cylinder wetted by water; p900 kg/m3, Cp 4 kJ/kgK, E0.9.

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