Concentration of air

itsme_kit · June 16, 2012, 14:29

If air is modelled to flow inside a pipe, is the concentration of air equal to 1 along the pipe?
Thanks

siara817 · June 18, 2012, 12:50

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.

itsme_kit · June 20, 2012, 19:10

Quote:

Originally Posted by siara817

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?
Thanks

June 16, 2012, 14:29	Concentration of air	#1
itsme_kit Senior Member Join Date: Jan 2012 Posts: 197 Rep Power: 15	If air is modelled to flow inside a pipe, is the concentration of air equal to 1 along the pipe? Thanks

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June 18, 2012, 12:50		#2
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 19	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.