CFD Online Discussion Forums

CFD Online Discussion Forums (
-   OpenFOAM (
-   -   Diesel density in gas (

Rickard.Solsjo June 14, 2010 09:18

Diesel density in gas
Is it possible to calculate the density of diesel number 2 as a function of temperature or pressure? Seems rather difficult

smehdi609 June 15, 2010 16:27

You must write you own themo model to be able to do that

Rickard.Solsjo June 23, 2010 05:10

Seems like no-one know.
What I did was instead to find the boiling temperature for diesel with 10-17 carbonatoms. The molecular weight is found just by adding the constituents of the carbohydrate, 12*#C+#H.
Thereafter I used some reference data from sandia experiments, by for e.g. Pickett, to get the ambient parameters and injection drop.
I used the equation of state to get the ambient pressure and then this pressure to get the fuel density. Since the injection pressure into a sandia bomb is about 1100bar or something like that, the density is about 200kg/m3

All times are GMT -4. The time now is 21:01.