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Concentration of air

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Old   June 16, 2012, 13:29
Default Concentration of air
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Ke Wu
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If air is modelled to flow inside a pipe, is the concentration of air equal to 1 along the pipe?
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Old   June 18, 2012, 11:50
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siamak rahimi ardkapan
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Usually, the concentration is the number of particles, or molecules per a unit cube. such as cm3. what do you mean?
In this case you need to look at the density, I think.
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Old   June 20, 2012, 18:10
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Quote:
Originally Posted by siara817 View Post
Usually, the concentration is the number of particles, or molecules per a unit cube. such as cm3. what do you mean?
In this case you need to look at the density, I think.
Density is a good point to have a think
No matter concentration or density, is passive scalar model only physical model to measure these quantities?
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