Page 25 - Air pollution and greenhouse gases from basic concepts to engineering applications for air emission control

xxvi Nomenclature

Stk Stokes number (–)
Modified Stokes number (–)
Stk m
*
Stk Critical Stokes number (–)
t e The life time of fuel droplet (s)
t x Breakthrough time of an adsorption column (s)
T Temperature (K)
Adiabatic flame temperature (K)
T a
Initial temperature (K)
T 0
Reference temperature (K)
T 0
Sutherland’s constant (K)
T s
Surface temperature of the fuel droplet (K)
T s
Vaporization temperature for the liquid fuel (K)
T v
THP Total heat production of occupants (J/s)
TLV Threshold limit value of the air pollutant (Depends)
u Velocity (m/s)
Magnitude of the mean fluid velocity (m/s)
u g
Vapor speed leaving the surface of the fuel droplet (m/s)
u s
u ∞ Air speed of the free steam (m/s)
Friction speed (m/s)
u *
Wind speed at 10 m above the ground (m/s)
u 10
u g Mean gas speed (m/s)
u θ Transverse/tangential speed (m/s)
U Gas velocity (m/s)
Air speed approaching the filter fiber (m/s)
U 0
Free air stream velocity (m/s)
U 0
Sampling velocity (m/s)
U s
U ∞ Air velocity approaching the filter (not the fiber) (m/s)
v Speed of the air parcel (m/s)
3
v Gas specific volume (m /kg)
v Velocity on the streamline (m/s)
Average air velocity in the focusing orifice exit plane (m/s)
v f
Radial speed of the particle (m/s)
v r
Stack emission speed (m/s)
v s
Terminal settling velocity (m/s)
v TS
v 0 Initial velocity of particle in the still air (m/s)
Particle critical velocity (m/s)
v cr
Mean impact velocity in thermal rebound (m/s)
v im
Impact velocity in thermal rebound (m/s)
v im
v θ Transverse/tangential speed (m/s)
3
V Total reactor volume (m )
3
V Volume of the indoor pace (m )
3
V Volume of gas (m )
3
V Volume of the air parcel (m )
V Voltage of ESP (V)