Question

a) Given the properties below, what is the average convective mass transfer coefficient of the second scenario?

b) What is the Sherwood # of scenario 2?

Gas X is at a temperature of 44°C is moving in crossflow over an object with s characteristic length of L 0.1 m and surface temperature of 31°C. The system has a Re# of 104 and an average convective heat transfer coefficient of 25 w/m24. The same object is then dipped in liquid Y and subjected to the same flow conditions. The amount of power required to maintain the same surface temperature in the dry condition (scenario 1) is doubled when the object is dipped in the liquid (scenario 2) Gas X PA,oo 2.5 kg/m3 Cp 1007 J/kg*K a 19.5 x 10-6 m2/s 00-L Liquid-Gas Mix DA-B 0.55 x 10-2 m2/s Liquid Y PA,s 0.023 kg/m3 hfg 320 J/kg

Answer 1

@sen ッcharad esant dagh (1):olm 5) sol la 2551m" use knor venay th 0.4.536二Pr de Pr=Y-=0.4536

Schmidt No(Se)V DA-B o53 1 や-33