While experimenting with trace compounds in my trickless environment, I have found that the resulting steady state concentrations scale with the square of the GunnsFluidSourceBoundary flow demand:
It appears that after trace compound rates are multiplied with the flow rate, the resulting mass, hence mole fraction "fluxes" are then multiplied once again with the flow rate (under the disguise of totalMolesIn) later in the influx mix call chain. Removing the first multiplication results in the theoretically correct, linearly scaling steady state concentrations for me (not saying that this is necessarily the solution though):

While experimenting with trace compounds in my trickless environment, I have found that the resulting steady state concentrations scale with the square of the
GunnsFluidSourceBoundaryflow demand:It appears that after trace compound rates are multiplied with the flow rate, the resulting mass, hence mole fraction "fluxes" are then multiplied once again with the flow rate (under the disguise of
totalMolesIn) later in the influx mix call chain. Removing the first multiplication results in the theoretically correct, linearly scaling steady state concentrations for me (not saying that this is necessarily the solution though):