[jpina]

Hello!

I've carried out a 2-phases simulation where a melted polymer enters into a mould with air and, once studying the results with CFD-Post, I've realized that I can make the contours of Phase 2.Volume Fraction and Phase 2.Mass Fraction.

It turns out that both contours are similar but slightly different.

Could someone explain me the difference and why are they different?

Thanks in advance!

[CeesH]

They are only equal if the density of both phases is equal.

As an example, consider a container where 50% of the volume is filled by solid steel, and the other 50% by a perfect vacuum. Then the volume fraction of steel in the container is 50%. The mass fraction of steel is, however, 100% because the vacuum has 0 density.

In your case, the density of the phases is nearly equal, but not exactly.

[Amn.doc]

Hi every one
My problem is how to inject the liquid phase of Oxygen under high pressure and
low temperature, then I can start the simulation even without combustion;
That set.

Thank you a lot in advance.