[cfd_user_pune]

Dear All,

Before simulating evaporation process, I am trying to find theoretical rough estimation of amount of vapor generated/rate of evaporation (kg/s or kg/m^2/s) when 20 kg of chloroform is maintained in 0.75m(dia) 1.2m(height) tank at constant temperature of 50 degC. I may consider there is vent of very small diameter.

One of way doing it is Hertz–Knudsen equation (https://en.wikipedia.org/wiki/Hertz%...udsen_equation). I got few doubts regarding this equation -
1)What are terms and their units in Hertz–Knudsen equation? Various litterateur has different forms of H-K equation to calculate evaporation.
2) I am getting some unrealistic answer when tried with dm/dt = Pv * sqrt ( m / (2*pi*R*T) ) Where Pv partial pressure of liq at 50 degC, m is molecular weight = 0.11938 kg/mol???(is unit correct) , R = 8.314 J / mol. K. I got answer as 36 kg/s which I thing is unrealistic.

3)If one wants to try this simulation in CFD which model to be used? any useful tutorial on this?
Thank you.