# Sources and scope / E001 v0.7

### S01 / OpenFOAM v2606 installed cavity tutorial; own modified simulations

case provenance, actual numerical measurements

https://github.com/gerlero/openfoam-app

### S02 / NASA/NPARC: Examining Spatial (Grid) Convergence

grid studies and limitations of convergence claims

https://www.grc.nasa.gov/www/wind/valid/tutorial/spatconv.html

### S03 / Greenshields & Weller: Notes on CFD, incompressible flow

governing equations and incompressible assumptions

https://doc.cfd.direct/notes/cfd-general-principles/incompressible-flow

### S04 / NASA/NPARC: Overview of Verification and Validation

verification versus validation

https://www.grc.nasa.gov/WWW/wind/valid/tutorial/overview.html

### S09 / Own primary-vortex centre analysis; piecewise bilinear velocity-zero estimate

instantaneous centre estimate at t*=10; not a physical attractor or exact solution

### S10 / Own controlled viscosity intervention: nu 0.001 to 0.004 m2/s

Actual N80 finite-time case; input and result hashes in viscosity-case.json

### S11 / Analytic central second difference: cosine peak (translated sine example)

Checked phi(y)=cos(pi*y) at y=0, equivalent to sin(pi*y) at y=0.5 under translation. This isolates a scalar interior operator, not the cavity discretisation error.

### C01 / Author biography supplied by Carsten: CFD practitioner and head of product development

Author wording and likeness review remain human release checks.

### S05 / Ghia, Ghia & Shin (1982), Tables I and II, Re100

Original PDF pages 12/13 visually checked; independent numerical reference, not experiment.

https://www.ljll.fr/~frey/papers/Navier-Stokes/Ghia%20V.%2C%20High-Resolutions%20for%20incompressible%20flow%20using%20the%20Navier-Stokes%20equations%20and%20a%20multi-grid%20method.pdf

### S12 / Greenshields & Weller: finite volume concept

Conceptual flux illustration; not measured face fluxes.

https://doc.cfd.direct/notes/cfd-general-principles/the-finite-volume-concept

### S13 / Installed OpenCFD v2606 icoFoam.C

PISO loop, pressure correction and required kinematic pressure read from the actual installed source.

### S14 / NASA/NPARC: Examining Iterative Convergence

Residuals and engineering outputs require interpretation.

https://www.grc.nasa.gov/www/wind/valid/tutorial/iterconv.html

### S15 / Greenshields & Weller: Time discretisation

Euler time approximation and contextual Courant-number interpretation.

https://doc.cfd.direct/notes/cfd-general-principles/time-discretisation

### S16 / Own additional stationarity, time-step and numerical-reference checks

Actual isolated runs, field hashes and publication-evidence.json.

### S17 / ASME V&V 20-2009 (R2021), official overview and contents

Overview and contents inspected; full licensed standard not reviewed. No conformance/certification claim.

https://www.asme.org/codes-standards/find-codes-standards/standard-for-verification-and-validation-in-computational-fluid-dynamics-and-heat-transfer/2009

### S18 / Botella & Peyret (1998), Re100 spectral extrema, Table 2

Original pp. 2/4 visually checked; left-moving reference lid reflected for our right-moving lid. Sampled extrema, not exact physical truth.

https://cats2d.com/documentation/botellapeyret98.pdf

### S19 / Own checked analytic term and continuity examples

Explicit functions and coefficients in review-math.json; labelled illustrations, not cavity measurements.

### S20 / ITTC Fresh Water and Seawater Properties, Rev02 (2011), Table1 p5

Fresh water20C at0.101325MPa: nu1.0034e-6m2/s; rounded1e-6 used in the similarity case, not exact thermophysical modelling.

https://ittc.info/media/4048/75-02-01-03.pdf

### S21 / Own matched-Re water-like N80 case

nu=1e-6, U=0.001m/s, t=1000s, dt=0.25s. fvSolution matches baseline exactly; installed solver residual normalisation inspected. Actual field comparison; earlier tighter-tolerance attempt retained separately.

### S22 / OpenFOAM solver and RAS documentation; installed icoFoam source

Transient incompressible laminar icoFoam; no Reynolds-averaged turbulence closure in this case. Checked against installed v2606 source, with official published solver source as a public reference.

https://api.openfoam.com/2412/icoFoam_8C_source.html

### S23 / OpenCFD: residual normalisation and installed lduMatrix solver source

Default residual norm and installed v2606 smoothSolver/lduMatrix normalisation inspected. Tolerance is applied to the normalised residual, not a velocity/pressure unit.

https://doc.openfoam.com/2306/tools/processing/numerics/solvers/residuals/