Fuel evaporation

Julie Polyakh

I deal with injected fuel evaporation modeling. n-Heptane injected into air @T=293K (both of them). Chemical model of combustion initiated. The results are very strange, e.g. the droplets evaporate very quickly and achieve the temperature of 45K (i.e.-228C).

I think the problem is saturation pressure set in Droplet Properties (Psat=10e+5 Pa (?) ). The questions are: 1) what are the units of pressure? 2) where is the value of the saturation pressure used in the calculations? 3) at what temperature it should be given (i.e. initial, mean, etc.) and 4) what is the saturation pressure for my fuel?

The most confusing here is that in handbooks I found there is no saturation pressure given, but only the vapor pressure. Is this the same?

Thanks,

Julie