I am attempting to define a mixture boundary condition on a inlet flow
condition and the mixture option is grayed out. What do I need to define to be
able to define a mixture setting?
Solution
To define a Mixture for a flow boundary condition the user must explicitly
define the external conditions. You cannot have the external conditions set to
ambient. Once an external condition is defined, then the mixture options will
become available.
Notes
See the Flow boundary conditions documentation for more details.