By definition, in a 1-way coupling simulation, data is transferred from one solution to another in only one direction. In this case the CFD solution provides information to the DEM solution, i.e., the fluid flow affects the particle trajectory but the particles do not affect the fluid flow. This is limited to situations where the particle loading is low and the coupling parameters are almost null. Please refer to the multiphase flow literature [2], [1] to evaluate these coupling parameters.
In most situations, the setup of a one-way coupling simulation requires Fluent to export a solution of the CFD domain. This information is then employed by Rocky during the simulation.
Finally, the following conditions are verified by Fluent when exporting the solution to Rocky:
Fluid cell zones with enabled porous media will not be exported.
Meshes with polyhedral cells around shadow boundaries are not supported.
For transient simulations, although the flow field changes with time and the fluid forces are considered when tracking particles, the fluid-particle interaction will not affect the fluid flow field.