Gas Boundary Condition Equations
In addition to the boundary conditions for the liquid, specify boundary conditions for the gas on
Wall
,
Inlet
,
Outlet
, and
Interior Wall
nodes. Select a
Gas Boundary Condition
:
Gas Concentration
Using this boundary condition, specify the effective gas density.
Gas Outlet
This boundary condition is appropriate for boundaries where the gas phase flows outward with the gas velocity,
u
g
, at the boundary.
Gas Flux
Using this boundary condition, specify the gas mass flux through the boundary:
Symmetry
This boundary condition, which is useful on boundaries that represent a symmetry line for the gas flow, sets the gas flux through the boundary to zero:
No Gas Flux
This boundary condition represents boundaries where the gas flux through the boundary is zero:
In walls moving with a boundary velocity
, the gas flux through the boundary is:
, the gas flux through the boundary is: