{
  "schema_version": 1,
  "scope": "Conditional similarity extrapolation and sampled phase-only mesh screen, not a run or convergence certificate",
  "reference": {
    "captured_frames": 487,
    "config": {
      "base_height": 0.52,
      "base_radius": 0.52,
      "capture_force_volumes": true,
      "capture_volumes": true,
      "cfl": 0.2,
      "derivative_epsilon": 2e-7,
      "forcing_end": null,
      "forcing_phase_step": 0.0375,
      "frame_spacing": "similarity",
      "frames": 81,
      "h": 0.008,
      "half_domain": 1,
      "integrator": "rk2",
      "localization_inner": 0.72,
      "localization_outer": 0.94,
      "max_dt": 0.00025,
      "mesh_preset": "full-domain",
      "min_cells_per_scale": 4,
      "paper_annulus_xa": 0.6,
      "paper_annulus_xb": 1.45,
      "paper_axial_bias": 0.12,
      "paper_axial_slope": 4,
      "paper_axis_lambda": 2,
      "paper_axis_offset": 0.03,
      "paper_axis_sigma": 0.25,
      "paper_eta_support": 0.86,
      "paper_eta_taper": 0.98,
      "paper_profile_revision": "appendix-b-axis-v1",
      "paper_swirl_bias": 0.08,
      "paper_time_cutoff_end": 0.775,
      "paper_time_cutoff_start": 0.55,
      "pressure_abs_tol": 1e-9,
      "pressure_max_iterations": 2000,
      "pressure_projection": "fft",
      "pressure_rel_tol": 1e-7,
      "preview_phase_step": 0.3,
      "preview_resolution": 192,
      "profile_interpolation": "cubic",
      "profile_model": "paper-surrogate",
      "pulse_axial_frequency": 2.5,
      "pulse_azimuthal_mode": 4,
      "pulse_correction_passes": 1,
      "pulse_correction_strength": 0.04,
      "pulse_hierarchy_levels": 3,
      "pulse_log_frequency": 1,
      "pulse_mode_stride": 1,
      "pulse_radial_frequency": 4,
      "pulse_rtheta_strength": 0.075,
      "pulse_rz_strength": 0.06,
      "pulse_scale_ratio": 0.68,
      "pulse_time_width": 0.46,
      "pulses_enabled": true,
      "ramp_time": 0.15,
      "resolution": 192,
      "stream_volumes": true,
      "swirl_ratio": 0.85,
      "t_end": 0.985,
      "t_star": 1,
      "t_start": 0,
      "velocity_scale": 0.25,
      "viscosity": 0.01,
      "volume_frames": 12
    },
    "diagnostics": {
      "axial_length": 0.06586280808726123,
      "peak_speed": 4.179807916147603,
      "radial_length": 0.06368673331236266,
      "t": 0.985
    },
    "run_id": "best-guess-n192-native-f32-rest-t0985",
    "source_commit": "9d2afb89096c869c1be3a7fb654cb8b797f03b35",
    "status": "complete"
  },
  "design_source_sha256": "6286f0cb8441f79f18937835dbd684d4cb57920a6a6a6fb418151ffb0b9c5d42",
  "forecasts": [
    {
      "speed_multiplier": 1,
      "projected_peak_model_units": 4.179807916147603,
      "t": 0.985,
      "tau": 0.015000000000000013,
      "radial_scale": 0.06368673331236266,
      "axial_scale": 0.06586280808726123,
      "radial_shrink_factor": 1,
      "inner_half_bump_velocity_wavelength": 0.02668973112080825,
      "radial_design_dx": 0.0016681081950505156,
      "radial_design_equivalent_n": 1200,
      "forcing_phase_dt_limit": 0.000013169538424803444,
      "force_difference_half_window_preserving_epsilon_over_tau": 2e-7,
      "additional_phase_only_steps": 0
    },
    {
      "speed_multiplier": 10,
      "projected_peak_model_units": 41.79807916147603,
      "t": 0.9998387174720215,
      "tau": 0.00016128252797848396,
      "radial_scale": 0.006603847027709082,
      "axial_scale": 0.00708168012538348,
      "radial_shrink_factor": 9.643883791544459,
      "inner_half_bump_velocity_wavelength": 0.0027675293167892805,
      "radial_design_dx": 0.00017297058229933003,
      "radial_design_equivalent_n": 11564,
      "forcing_phase_dt_limit": 1.416010966308053e-7,
      "force_difference_half_window_preserving_epsilon_over_tau": 2.1504337063797843e-9,
      "additional_phase_only_steps": 5161
    },
    {
      "speed_multiplier": 100,
      "projected_peak_model_units": 417.98079161476034,
      "t": 0.9999982658630779,
      "tau": 0.0000017341369220753628,
      "radial_scale": 0.0006847704898206246,
      "axial_scale": 0.0007614341819712228,
      "radial_shrink_factor": 93.00449458481393,
      "inner_half_bump_velocity_wavelength": 0.0002869724870819978,
      "radial_design_dx": 0.000017935780442624863,
      "radial_design_equivalent_n": 111510,
      "forcing_phase_dt_limit": 1.522518855276123e-9,
      "force_difference_half_window_preserving_epsilon_over_tau": 2.312182562767148e-11,
      "additional_phase_only_steps": 10321
    }
  ],
  "explicit_diffusion_warning": {
    "scope": "Applying the existing global uniform-grid explicit rule to a fixed fine spacing, not a derived AMR stability limit",
    "candidate_core_equivalent_n": 16384,
    "dt_limit": 1.7881393432617188e-7,
    "active_interval_step_lower_bound": 2515681
  },
  "tenfold_mesh_candidates": [
    {
      "base_n": 128,
      "levels": 4,
      "patch_fraction": 0.5,
      "finest_effective_n": 1024,
      "stored_cells": 8388608,
      "active_cells": 7602176,
      "minimum_sampled_doubled_phase_points": 0.5469503087906682,
      "worst_sample": {
        "t": 0.9998387174720215,
        "xyz": [
          0.007630558744401354,
          0,
          -0.0020258760172273717
        ],
        "level": 3,
        "dx": 0.001953125,
        "phase_gradient_norm": 2940.843825821088
      },
      "sampled_phase_screen_passed": false,
      "production_ready": false,
      "time_samples": 257,
      "spatial_samples_per_X_eta": 25,
      "retained_sample_count": 1444959
    },
    {
      "base_n": 128,
      "levels": 8,
      "patch_fraction": 0.5,
      "finest_effective_n": 16384,
      "stored_cells": 16777216,
      "active_cells": 14942208,
      "minimum_sampled_doubled_phase_points": 2.8187674020974796,
      "worst_sample": {
        "t": 0.9014405396455663,
        "xyz": [
          0.4897952186913647,
          0,
          -0.24111274248748413
        ],
        "level": 0,
        "dx": 0.015625,
        "phase_gradient_norm": 71.32973429454808
      },
      "sampled_phase_screen_passed": false,
      "production_ready": false,
      "time_samples": 257,
      "spatial_samples_per_X_eta": 25,
      "retained_sample_count": 1444959
    },
    {
      "base_n": 128,
      "levels": 8,
      "patch_fraction": 0.75,
      "finest_effective_n": 16384,
      "stored_cells": 51642368,
      "active_cells": 45449216,
      "minimum_sampled_doubled_phase_points": 4.2473662734492414,
      "worst_sample": {
        "t": 0.7724357171005698,
        "xyz": [
          0.7353654041901067,
          0,
          -0.363928282259331
        ],
        "level": 0,
        "dx": 0.015625,
        "phase_gradient_norm": 47.33802476292361
      },
      "sampled_phase_screen_passed": false,
      "production_ready": false,
      "time_samples": 257,
      "spatial_samples_per_X_eta": 25,
      "retained_sample_count": 1444959
    },
    {
      "base_n": 128,
      "levels": 8,
      "patch_fraction": 0.875,
      "finest_effective_n": 16384,
      "stored_cells": 80773120,
      "active_cells": 70938624,
      "minimum_sampled_doubled_phase_points": 4.9697276139077164,
      "worst_sample": {
        "t": 0.6897592562290891,
        "xyz": [
          0.8689900410224776,
          0,
          -0.42387364720695947
        ],
        "level": 0,
        "dx": 0.015625,
        "phase_gradient_norm": 40.457333972807206
      },
      "sampled_phase_screen_passed": false,
      "production_ready": false,
      "time_samples": 257,
      "spatial_samples_per_X_eta": 25,
      "retained_sample_count": 1444959
    },
    {
      "base_n": 160,
      "levels": 8,
      "patch_fraction": 0.75,
      "finest_effective_n": 20480,
      "stored_cells": 100864000,
      "active_cells": 88768000,
      "minimum_sampled_doubled_phase_points": 5.329467170968081,
      "worst_sample": {
        "t": 0.7724357171005698,
        "xyz": [
          0.7442475818752918,
          0,
          -0.363928282259331
        ],
        "level": 0,
        "dx": 0.0125,
        "phase_gradient_norm": 47.15807494908175
      },
      "sampled_phase_screen_passed": false,
      "production_ready": false,
      "time_samples": 257,
      "spatial_samples_per_X_eta": 25,
      "retained_sample_count": 1444959
    },
    {
      "base_n": 192,
      "levels": 8,
      "patch_fraction": 0.75,
      "finest_effective_n": 24576,
      "stored_cells": 174292992,
      "active_cells": 153391104,
      "minimum_sampled_doubled_phase_points": 6.395360605161697,
      "worst_sample": {
        "t": 0.7724357171005698,
        "xyz": [
          0.7442475818752918,
          0,
          -0.363928282259331
        ],
        "level": 0,
        "dx": 0.010416666666666666,
        "phase_gradient_norm": 47.15807494908175
      },
      "sampled_phase_screen_passed": false,
      "production_ready": false,
      "time_samples": 257,
      "spatial_samples_per_X_eta": 25,
      "retained_sample_count": 1444959
    }
  ],
  "limitations": [
    "Anchored to a spatially unvalidated peak; no fitted peak-growth law.",
    "All speeds and lengths remain in model units. No Mach number or acoustic transition is defined.",
    "Samples can miss minima and small cells do not establish solution accuracy.",
    "Envelope, Cartesian-basis variation, numerical correction, background, taper and momentum transport still need verification.",
    "The finite surrogate does not establish the paper's infinite hierarchy or a singularity."
  ]
}