AddiDict is GeoDict’s module for the simulation of mass transport by fluid streams. The name of the module stems from the idea to simulate mass transport by advective and diffusive movements. Mass transport can be simulated either for particles or a concentration field that represents the molar concentration of a solute, which is a dissolved substance within the carrying fluid.

A mass transport simulation is typically set up in the following way:

1. Modeling of a 3D microstructure from 3D image-data (µCT, FIB-SEM, etc.), imported and segmented (with ImportGeo-Vol), or
   Generation of a 3D microstructure model with a GeoDict structure generator module.
2. Setting of experimental parameters such as transport mechanisms, boundary conditions, and simulated time.
3. Definition of fluid and porous media characteristics such as density, viscosity, and permeability.
4. Definition of particle characteristics (size, density, etc.) and specification of particle insertion, or
   Definition of a inflow concentration or existing concentration field.
5. Setting options for the chosen flow solver.
6. Computation of flow fields, particle / concentration field motion and particle trajectories.
7. Analysis and visualization of the obtained results.