VERIFY / 015
Grid Convergence Index (GCI) & Mesh Independence Calculator
Turn a three-mesh CFD study into a quantitative discretization-uncertainty check using observed order, Richardson extrapolation and Grid Convergence Index.
Use the calculation to challenge the CFD setup.
A statement such as “the result changed only 2%” is useful but incomplete. GCI gives the mesh study a repeatable verification framework and makes the assumed refinement behavior explicit.
Define the reference scale. Use values that represent the actual engineering problem.
Calculate transparently. The tool exposes the governing relation and intermediate outputs.
Compare with the solver. Look for inconsistent definitions, units or modelling assumptions.
Test sensitivity. Important CFD conclusions should not depend on one arbitrary input or discretization choice.
Move from calculation to diagnosis.
Use the result as a benchmark, then follow the relevant Technical Case or consulting capability when the actual CFD model needs deeper judgement.