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Injection into cylinder

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Old   March 25, 2015, 08:33
Default Injection into cylinder
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I'm trying to model n-octane injection into the cylinder filled with air (ideal gas). I want to see how it mixes (mass fraction ) and as n-octane evaporates. The dimensions of the cylinder: diameter 20 mm, height 127 mm. Injection is located in the middle of the cylinder base (circle with a diameter of 0.3 mm). Geometry and selected parameters are in the file posted below.
Injection time is 2 ms, and the n-octane weight is 0,015 grams. The mass of air in the cylinder is 0.223 gram.
Is this type of injection correct? I want to inject a stream.
How to calculate the total flow rate and velocity magnitude? The mass of n-octane injected into cylinder isn’t correct. It is very small.

What about a models that I chose? Are they correct? (species transport and discrete phase)?

And last question. Injection time is 2ms. What time step size and max iterations should be taken.

Thank you for any help.

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injection model

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