Page 30 - gas transport in porous media
P. 30
Chapter 2: Gas Transport Mechanisms
F
¯ g mass flux 23
gravity
J M diffusive mole flux relative to molar-average velocity value
k permeability
m molecular weight
N D diffusive mole flux relative to stationary coordinates
N T total mole flux relative to stationary coordinates
n molecular density
P pressure
P average pressure
r radius
R gas constant
Re k permeability-based Reynolds number
S saturation
T temperature
u Darcy velocity
V pore velocity
x mole fraction
Greek
β porous media factor
τ tortuosity
φ porosity
ρ density
µ viscosity
˜ µ effective viscosity at wall (Brinkman equation)
Subscript
A,B components A, B
air value for air
CF clear fluid
DGM Dusty Gas Model
g gas
K Knudsen diffusion
liquid phase
pore pore
PM porous media
rat ratio
ref reference
S saturation
0 all-gas conditions
1,2 component 1, 2
