Terminal Settling Velocity (aka Gravitational Field Drift Velocity)
Equation
Input
Enter values in all but one input field and hit ENTER
v
grav,∞
(m s
-1
)
d
me
(m)
δ
κ
λ
g
(m)
η
g
(kg m
-1
s
-1
)
m
(kg)
G
(m s
-2
)
Output
v
grav,∞
= 8.59685 × 10
-7
m s
-1
Term List
v
grav,∞
, Terminal Settling Velocity (aka Gravitational-Field Drift Velocity)
d
me
, Mass-Equivalent Diameter
m
, Particle Mass
C
c
, Cunningham Slip Correction Factor
G
, Acceleration due to Gravity
δ
, Porosity Factor
κ
, Envelope Shape Factor
η
g
, Dynamic Viscosity
λ
g
, Mean Free Path
Reference
{
Equation 7.3 of N.A. Fuchs,
The Mechanics of Aerosols
, Oxford: Pergamon Press, 1964, available as an Unabridged Dover (1989) republication.
,
,
Equation 9.42 of J. Seinfeld and S. Pandis,
Atmospheric Chemistry and Physics
, New York: Wiley, 2006.
}
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