01 / HIERARCHY
Structured blocks
A quadtree in 2D and octree in 3D organize fixed-size Cartesian blocks into a hierarchy that is practical to refine, traverse, and visualize.
Independent CFD development
Adaptive flow,
resolved where
it matters.
OctFlux CFD explores a finite-volume solver built around block-structured octree adaptive mesh refinement: focused resolution for evolving flow features, guided by verification from the start.
Illustrative AMR hierarchy — refinement concentrates near a local feature.
Octree AMRBlock-structured spatial adaptivity
Finite volumeConservative flow formulation
Verification-ledBenchmarks guide development
The approach
Make resolution a decision, not a default.
The project focuses on the foundations that make adaptive simulation credible: hierarchy, conservative coupling, and transparent validation.
02 / CONSERVATION
Interfaces matter
Adaptive grids are only useful when transitions are treated carefully. The focus is consistent transfer and conservation across coarse-to-fine regions.
03 / EVIDENCE
Measure the basics
Known flows, mesh sensitivity, and observable physical quantities set a clear bar for each milestone.
Validation roadmap
Small cases, useful evidence.
The initial benchmark suite is designed to make progress measurable from the start.
Lid-driven cavity
A compact incompressible-flow reference for vortex placement, centreline profiles, and resolution sensitivity.
CYLINDER WAKE
Flow past a cylinder
Use an unsteady wake to examine separation, force trends, and adaptive resolution around a moving flow feature.
CANONICAL FLOWS
Transport & shock cases
Simple manufactured and canonical problems help test accuracy, stability, and adaptation logic before complexity grows.
Project status
Under active development.
OctFlux CFD is an independent technical project. Public updates will be added as reproducible benchmark material becomes available.