# Density pressure Temprature

1. Apr 3, 2012

### sam_021

1. The problem statement, all variables and given/known data
I have a grid with
Surrounding density = rho
Surrounding Temp = T
Surrounding Pressure = P

And I also have denser particles which over all have
density = 10rho
temp = 10T
Pressure = P

Now I want to average the densities, and have that as my new surrounding density with no particles .. But if i take the averages, I will get a different value for the pressure whiche doesnt make sense
How would I take the average ?

2. Relevant equations

3. The attempt at a solution

2. Apr 4, 2012

### clamtrox

If the particles don't follow the same equation of state, how do you calculate the pressure for the combined gas? Or should you have the temperature of denser particles be 1/10 T?

3. Apr 4, 2012

### sam_021

sorry yes T= 1/10 K
and I think i worked it out, would this be the average density:

(Volume of particle/total volume)*(10rho) + (Volume of surrounding/total volume)*rho = Average density

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