This EPPIC Tutorial introduces the EPPIC program, it's basic features and user interface.
This EPPIC tutorial covers envelopes and phantoms. These are ways of activating or deactivating zones (i.e. including or excluding them from simulation calculations). Envelopes use existing mesh geometry to define kill or revive zones, while phantoms use preexisting geometrical shapes.
This EPPIC tutorial covers force overlaps. By default, EZAir summates the forces on all live wall cells. In the case of two or more overlapping walls, this may lead to the force in the overlapping area being added multiple times. A Force Overlap defines a region where walls from different grids overlap. The force overlap is needed to prevent double pressure integration
This EPPIC tutorial covers cell classification and orphan points. Cells of a grid can be of several types, including Boundary condition cells (e.g. wall, O-Mesh, E-Mesh) and live cells. Cells that are not live should either be perscribed a boundary conditions or look for interpolation from an overlapping grid. If a non-live cell cannot find data through interpolation and is not assigned a boundary condition it becomes an orphan point and raises an error.