Architecture
Accuracy and speed are an
engineering choice
.
Rheona™ is built around a single, cache-optimized finite-element core that every physics module shares. That design is why one platform can credibly couple melt-pool thermal transients to furnace-scale sintering — and still run on a workstation.
DESIGN PRINCIPLES
Four decisions that make it fast.
Native-speed math
The hot calculations are JIT-compiled to native, multi-threaded code, so the heaviest part of every simulation runs as fast as your processor allows.
Skip the redundant work
When the mesh holds steady between time steps, the engine reuses what it can and recomputes only what changed — keeping long, multi-step runs fast from start to finish.
One proven engine
A shared assembly strategy serves every physics module, so thermal, structural, and sintering simulations all run on the same battle-tested, well-optimized core.
Precision where it pays
Choose a leaner single-precision mode to fit bigger meshes in memory, or full double precision when a model demands it — per run, your call.
PROCESS COVERAGE
Every stage of the build, one tool.
Temperature-driven physics, not static inputs. In the furnace cycle, viscosity isn't a fixed number — Rheona recomputes it from each element's current temperature at every timestep through an Arrhenius law, so densification and shrinkage track the real furnace profile you define.
✓ Temperature → Sintering: the furnace time–temperature profile governs the Arrhenius viscosity, and therefore the viscous flow and shrinkage rate, at every step.
✓ Inherent-strain structural: predicts residual stress and distortion directly from the layer-by-layer inherent-strain method — fast, because it skips the melt-pool physics entirely.
✓ Stability guards: advanced integration with hourglass control, adaptive cooling substeps, and built-in validation checks keep runs robust across the full temperature range.
Confidence
Grounded in established physics.
Rheona's formulations follow the peer-reviewed mechanics of viscous sintering, transient heat transfer, and thermo-elastic residual stress — not black-box correlations.
Exact Jacobians
Surface and volume integrals use true element Jacobians with 2×2 / 2×2×2 Gauss quadrature — no geometric approximation in the convection or stiffness terms.
Mass conservation
The density update is derived from the divergence of the velocity field, so total solid mass is preserved as the part shrinks.
Efficient export
Results export to standard VTU for optional independent inspection in the Rheona™ platform.