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INPUT   DATA

♥ EXAMPLE Of Input/Output

Title

Particle effective diameter, dp		μm (microns)
Particle specific gravity, ρp
Temperature of gas, T		°C

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OUTPUT   VARIABLES   &   GRAPHS

Variables	Values	Units
♦  Cunningham correction factor, Cc
♦  Aerodynamic diameter, dp,a		μm

Diameter Of Particle In Motion In A Fluid

Aerodynamic diameter is defined as the diameter of a sphere of unit specific gravity having the same falling speed in air as the particle under study. The Cunningham correction factor accounts for the situation when the particle sizes are comparable to the mean free path of the fluid molecules.

The aerodynamic factor is defined by the equation:

     d_p,a = d_p√[ρ_pC_c]

     C_c ≈ 1 + [6.21x10^-4]T/d_p

where
     d_p,a= aerodynamic diameter of particle
     d_p = actual effective diameter of particle
     ρ_p= specific gravity of particle
     C_c = Cunningham correction factor
     T = temperature of gaseous medium, °K

Tips

    ◊ Use link EXAMPLE Of Input/Output  to demo data entry expectations and results; you may edit & use it as starting point

BIBLIOGRAPHY

• Theodore L; Nanotechnology,: Basic Calculations For Engineers And Scientists; John Wiley & Sons, New Jersey, 2006