(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I am trying to integrate the momentum equation in the Navier-Stokes equations, and I need to make sure I have the density formulation correct. I'm unsure of my work because a lot of the terms in the end are canceling out.

It's a two-phase mixture, so the sum of the partial pressures is:

P = P_a+P_v

Where a and v denote air and vapor, respectively.

2. Relevant equations

Ideal gas law

density=P/(R_gas*T)

3. The attempt at a solution

Using the sum of partial pressures, I'm getting this for total density:

[tex]\rho[/tex]=[tex]\rho_{a}*R_{a}/R[/tex]+[tex]\rho_{v}*R_{v}/R[/tex]

Where R is the total gas constant.

I am trying to find an equation for the total density in terms of the partial densities.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Partial Density

**Physics Forums | Science Articles, Homework Help, Discussion**