CAOS_MillDEM
A cross-platform 2D soft-sphere discrete element method (DEM) engine for tumbling-mill charge motion and power. No C++ toolchain, no WSL: pure NumPy with an optional Numba JIT and an optional Torch-CUDA path.
It simulates a rotating mill disc slice (the Govender et al. 2015 reduced setup, width = one particle
diameter) with a soft-sphere contact law (linear Hookean or Hertzian, Coulomb friction, restitution damping)
and reports the DEM charge shape (toe/shoulder), the motion regime (cascading / cataracting / centrifuging),
and the net power via the van Nierop (2001) torque route P = 2*pi*T*N.
from milldem import simulate, MillConfig
m = simulate(MillConfig(diameter_m=5.0, phi_c=0.75, fill=0.30), sim_time=2.0)
print(m.net_power_kw, m.regime, m.toe_deg, m.shoulder_deg)
CLI: milldem run --D 5 --phi 0.75 --J 0.30 --time 2.0 --json out.json
See docs/VALIDATION.md for the honest validated-scope statement, and docs/ for the contact-model equations, the power routes, and the validation against the classical
Hogg-Fuerstenau and Morrell power models. MIT licensed.
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