Verification: icoFoam_cavity::cfl_blowup
rejectrule VER-5.3 · grade C · basis validity
Why
| Code | Severity | Finding | Read | Method | Value | Threshold |
|---|---|---|---|---|---|---|
| cfl.max | critical | Courant number exceeds stability limit: max Co=9.66 at t=0.15 exceeds limit 1.0; still 8.92 over the final fifth of the run | icoFoam_cavity__cfl_blowup.log.gz (t = 0.15) | checker cfl | 9.66086 | 1.0 |
| convergence.residual | major | transient solve judged on stability rather than a residual threshold — Courant number settled at 8.92, above the stability limit of 1 — a transient solve that does not respect its timestep criterion is not converged, whatever the residuals say (final worst residual 3.61e-01) | icoFoam_cavity__cfl_blowup.log.gz | check convergence.residual (Residuals converged below tolerance) | 0.361172 | — |
| cfl.climbing | warn | Courant number climbing on a fixed timestep: Co rose 0 -> 9.66; icoFoam has no adaptive timestep | icoFoam_cavity__cfl_blowup.log.gz | checker cfl | 0.0 | 1.0 |
Probable causes
- NUM.CFL_VIOLATION — Courant number too high
- NUM.MISSING_ADJUSTABLE_DT — Fixed dt without adjustableRunTime
Next action
Suggested, not applied: Reduce deltaT in controlDict
Residuals
UxUyp
Initial residual per field and step, drawn from the solver log (log scale).
Courant number
Courant max
Maximum Courant number per step, drawn from the solver log.
Not checked
- Solution fields were not read: no time directory with fields was found.
- Discretisation error was not quantified: a single mesh was supplied.
- Accuracy against a reference was not assessed: no reference data was supplied.
- Field values physically plausible: no internal fields
- Flow regime matches turbulence modeling: insufficient data for Reynolds number
- Near-wall y+ compatible with wall treatment: no y+ field
- Net boundary mass flux ~ 0: no field flux data
- No specification given: conformance to the task was not assessed.
Inputs
| File | Bytes | SHA-256 |
|---|---|---|
| icoFoam_cavity__cfl_blowup.case.json | 1,276 | f7df306c6d60ec9cf5e3c5dbf61acb03430faeb2f1c4ffd27315d526b447d89a |
| icoFoam_cavity__cfl_blowup.log.gz | 1,887 | 2e851daab9151dd9aa29cdf76163afcb11e38b5ab1f5feb398d2f4f2ef3737ed |