[tav98f]

I am using a particle user source in a simulation and under,
Default Domain>Fluid Pair Models,
it asks me to specify Particle Coupling as One-way Coupled or Fully Coupled

When the particle user source checkbox is checked there is another checkbox underneath that says particle coupling and has the options One-way Coupled or Fully Coupled

These seem to be the same thing, but why can I specify it in two places and which one will take presidence. Or if they are not the same thing then what is the difference between these?

I am using CFX 12.1