A
Area; arbitrary property in transport
c
Particle speed
Cp
Specific heat at constant pressure
CV
Specific heat at constant volume
d
Molecular (particle) diameter
D
Diffusion coefficient
e
Energy per unit mass
E
Random thermal energy (per particle) (
Ch. 2)
f(i)
Distribution function of property(i)
g
Degeneracy
G
Mass (identity) flux
h
Planck's constant
k
Boltzmann's constant
K
Coefficient of thermal conduction
m
Mass of individual molecule/atom particle
n
Number of particles per unit volume
ni
Number of particles per unit volume that have the property, i
N
Total number of particles
q
Heat flux
Q
Energy partition function
R
Gas constant
Universal gas constant
S
Cross-section area for transport