Note that the product of the translational stream
variable (velocity, φ) and the flow variable (current,
Ṅ) is only conserved among species with the same specific
mass. This connector is not directly connected among different
species. It is first converted to the Reaction connector using
the ChemicalReaction
adapter, which reconciles the different specific masses.
For more information, please see the documentation of the Connectors package.