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-   -   Diesel density in gas (http://www.cfd-online.com/Forums/openfoam/77126-diesel-density-gas.html)

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


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