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Domain & Regions

This section covers how the simulation domain itself is defined, and how to carve out named spatial regions within it — used to populate the system with particles, restrict analysis to a subvolume, or assign values to a subset of the grid.

  • Simulation Domain — the domain operator: cell size, grid dimensions, bounds, periodic/mirror boundary conditions and the physical/grid space transform
  • Spatial Regions — the particle_regions operator and its geometric shapes (boxes, planes, cylinders, spheres, cones), boolean region expressions, and the operators that consume them