{
  "evidence": "NEW_MATCHED_LOW_SPEED_CFD_NOT_VEHICLE_VALIDATION",
  "physical_measurements": 0,
  "cases": [
    {
      "name": "p2-matched-open-L4-U10-p2test",
      "mode": "p2-matched-open",
      "level": 4,
      "iterations": 1200.0,
      "snapshot": 1200,
      "completed": true,
      "half_domain_cells": 143950,
      "standard_mesh_pass": true,
      "extended_mesh_notes": [
        "***Concave cells (using face planes) found, number of cells: 5154",
        "Failed 1 mesh checks."
      ],
      "paired_total_wall_drag_N": 0.5944096102803,
      "last200_drag_range_N": [
        0.59301655522,
        0.59565597664
      ],
      "last100_vs_previous100_drag_drift_fraction": 0.0004491400609659264,
      "residual_initials": {
        "Ux": 1.549132563e-05,
        "Uy": 0.0001567724691,
        "Uz": 0.0002002400765,
        "p": 0.002693432199,
        "k": 2.442595112e-05,
        "omega": 1.818457784e-06
      },
      "exact_domain_face_flux_imbalance_fraction": 9.57575836805931e-10,
      "metadata": {
        "name": "p2-matched-open-L4-U10-p2test",
        "mode": "p2-matched-open",
        "surface_refinement": 4,
        "speed_ms": 10,
        "Re_length": 320000.0,
        "half_domain": true,
        "force_multiplier": 2,
        "rho_kgm3": 1.2,
        "reference_frontal_area_m2": 0.027,
        "reference_area_note": "Envelope width*height, not measured projected frontal area; use force and CdA for comparison.",
        "solver": "OpenFOAM 2412 simpleFoam, steady incompressible RANS kOmegaSST",
        "inlet_turbulence_intensity": 0.01,
        "turbulent_length_scale_m": 0.01,
        "ground": "No ground boundary: preliminary free-air mechanism test",
        "wheel_rotation": false,
        "heating_W": 0,
        "generator_load": 0,
        "scope": "Unvalidated numerical mechanism test. Not a high-end-car performance comparison.",
        "revision": "P3.3 matched-geometry CFD",
        "variant": "p2-matched-open",
        "surface_sha256": "873d7caef3c1974aef39151e30551a45ddee7d6992d3592b2aa3c7423d0e6907",
        "physical_measurements": 0,
        "upper_vent_state": "Flush closed speed mode",
        "door_state": "Flush closed exterior envelope",
        "shape": "Engineering design-law body, not the luxury styling image",
        "comparison": "Total wall force; open/blocked same P3 outer envelope and P2 law with same cubic-loft policy. No transfer to high-speed claims."
      },
      "sections": [
        {
          "x_m": 0.01,
          "nominal_CAD_area_m2": 0.0028241612194255263,
          "integrated_fluid_area_m2": 0.002811546475395094,
          "paired_mass_flow_kgs": 0.012933006380632097,
          "bulk_axial_speed_ms": 1.9166507492427103,
          "flux_weighted_total_pressure_Pa": 59.975930678552025
        },
        {
          "x_m": 0.09,
          "nominal_CAD_area_m2": 0.0005654866776461627,
          "integrated_fluid_area_m2": 0.0005550830602169474,
          "paired_mass_flow_kgs": 0.011326357568895908,
          "bulk_axial_speed_ms": 8.501999055532595,
          "flux_weighted_total_pressure_Pa": 56.56294065568961
        },
        {
          "x_m": 0.185,
          "nominal_CAD_area_m2": 0.0011688054337124312,
          "integrated_fluid_area_m2": 0.001156499535913881,
          "paired_mass_flow_kgs": 0.01251963379484587,
          "bulk_axial_speed_ms": 4.510606290095588,
          "flux_weighted_total_pressure_Pa": 43.326850391759194
        },
        {
          "x_m": 0.24,
          "nominal_CAD_area_m2": 0.0011749556524425827,
          "integrated_fluid_area_m2": 0.0011641232577585814,
          "paired_mass_flow_kgs": 0.012200133955709546,
          "bulk_axial_speed_ms": 4.366710410029894,
          "flux_weighted_total_pressure_Pa": 41.911987318918825
        },
        {
          "x_m": 0.33,
          "nominal_CAD_area_m2": 0.0006498715779897573,
          "integrated_fluid_area_m2": 0.0006405281966044077,
          "paired_mass_flow_kgs": 0.011106435557661195,
          "bulk_axial_speed_ms": 7.224789645313464,
          "flux_weighted_total_pressure_Pa": 37.22307152006448
        },
        {
          "x_m": 0.4,
          "nominal_CAD_area_m2": 0.0005654866776461627,
          "integrated_fluid_area_m2": 0.0005561224744943492,
          "paired_mass_flow_kgs": 0.011468380473434068,
          "bulk_axial_speed_ms": 8.59251708587335,
          "flux_weighted_total_pressure_Pa": 29.2510716660635
        },
        {
          "x_m": 0.47,
          "nominal_CAD_area_m2": 0.0009424777960769374,
          "integrated_fluid_area_m2": 0.0009323609779601713,
          "paired_mass_flow_kgs": 0.012310275256007877,
          "bulk_axial_speed_ms": 5.5013899958488635,
          "flux_weighted_total_pressure_Pa": 24.46718071808341
        }
      ],
      "reconstructed_section_mass_flow_spread_fraction": 0.15246067161141963,
      "paired_internal_mass_flow_mean_kgs": 0.011980603283883794,
      "total_pressure_loss_inlet_to_exit_Pa": 35.50874996046862,
      "loss_K_at_sampled_minimum_area": 0.7594409259525963,
      "section_reconstruction_note": "Interpolated point-field ellipse cuts. Not exactly conservative; report spread, face-flux balance and mesh sensitivity separately."
    },
    {
      "name": "p33-blocked-L4-U10-p2test",
      "mode": "p33-blocked",
      "level": 4,
      "iterations": 1200.0,
      "snapshot": 1200,
      "completed": true,
      "half_domain_cells": 132042,
      "standard_mesh_pass": true,
      "extended_mesh_notes": [
        "***Concave cells (using face planes) found, number of cells: 4956",
        "Failed 1 mesh checks."
      ],
      "paired_total_wall_drag_N": 0.6049241979916,
      "last200_drag_range_N": [
        0.60016084442,
        0.60975350402
      ],
      "last100_vs_previous100_drag_drift_fraction": 0.0008285750671968339,
      "residual_initials": {
        "Ux": 6.711869063e-05,
        "Uy": 0.0008068312176,
        "Uz": 0.0007957565042,
        "p": 0.01017949129,
        "k": 0.0001427482132,
        "omega": 1.345743501e-05
      },
      "exact_domain_face_flux_imbalance_fraction": 1.5913939397237162e-07,
      "metadata": {
        "name": "p33-blocked-L4-U10-p2test",
        "mode": "p33-blocked",
        "surface_refinement": 4,
        "speed_ms": 10,
        "Re_length": 320000.0,
        "half_domain": true,
        "force_multiplier": 2,
        "rho_kgm3": 1.2,
        "reference_frontal_area_m2": 0.027,
        "reference_area_note": "Envelope width*height, not measured projected frontal area; use force and CdA for comparison.",
        "solver": "OpenFOAM 2412 simpleFoam, steady incompressible RANS kOmegaSST",
        "inlet_turbulence_intensity": 0.01,
        "turbulent_length_scale_m": 0.01,
        "ground": "No ground boundary: preliminary free-air mechanism test",
        "wheel_rotation": false,
        "heating_W": 0,
        "generator_load": 0,
        "scope": "Unvalidated numerical mechanism test. Not a high-end-car performance comparison.",
        "revision": "P3.3 matched-geometry CFD",
        "variant": "p33-blocked",
        "surface_sha256": "cdd44b4cd6681efb7d5b73817ed66c48d7dcdc4079a77a45f71963b2ad45a617",
        "physical_measurements": 0,
        "upper_vent_state": "Flush closed speed mode",
        "door_state": "Flush closed exterior envelope",
        "shape": "Engineering design-law body, not the luxury styling image",
        "comparison": "Total wall force; open/blocked same P3 outer envelope and P2 law with same cubic-loft policy. No transfer to high-speed claims."
      }
    },
    {
      "name": "p33-blocked-L5-U10-p2test",
      "mode": "p33-blocked",
      "level": 5,
      "iterations": 1200.0,
      "snapshot": 1200,
      "completed": true,
      "half_domain_cells": 661732,
      "standard_mesh_pass": true,
      "extended_mesh_notes": [
        "***Concave cells (using face planes) found, number of cells: 18415",
        "Failed 1 mesh checks."
      ],
      "paired_total_wall_drag_N": 0.6261418381822,
      "last200_drag_range_N": [
        0.61152322398,
        0.6403404753
      ],
      "last100_vs_previous100_drag_drift_fraction": 0.03127016036692724,
      "residual_initials": {
        "Ux": 5.88075369e-05,
        "Uy": 0.0004882717467,
        "Uz": 0.000489334621,
        "p": 0.005102213579,
        "k": 0.000146741086,
        "omega": 2.09237513e-05
      },
      "exact_domain_face_flux_imbalance_fraction": 2.2509090833657618e-08,
      "metadata": {
        "name": "p33-blocked-L5-U10-p2test",
        "mode": "p33-blocked",
        "surface_refinement": 5,
        "speed_ms": 10,
        "Re_length": 320000.0,
        "half_domain": true,
        "force_multiplier": 2,
        "rho_kgm3": 1.2,
        "reference_frontal_area_m2": 0.027,
        "reference_area_note": "Envelope width*height, not measured projected frontal area; use force and CdA for comparison.",
        "solver": "OpenFOAM 2412 simpleFoam, steady incompressible RANS kOmegaSST",
        "inlet_turbulence_intensity": 0.01,
        "turbulent_length_scale_m": 0.01,
        "ground": "No ground boundary: preliminary free-air mechanism test",
        "wheel_rotation": false,
        "heating_W": 0,
        "generator_load": 0,
        "scope": "Unvalidated numerical mechanism test. Not a high-end-car performance comparison.",
        "revision": "P3.3 matched-geometry CFD",
        "variant": "p33-blocked",
        "surface_sha256": "cdd44b4cd6681efb7d5b73817ed66c48d7dcdc4079a77a45f71963b2ad45a617",
        "physical_measurements": 0,
        "upper_vent_state": "Flush closed speed mode",
        "door_state": "Flush closed exterior envelope",
        "shape": "Engineering design-law body, not the luxury styling image",
        "comparison": "Total wall force; open/blocked same P3 outer envelope and P2 law with same cubic-loft policy. No transfer to high-speed claims."
      }
    },
    {
      "name": "p33-open-L4-U10-p2test",
      "mode": "p33-open",
      "level": 4,
      "iterations": 1200.0,
      "snapshot": 1200,
      "completed": true,
      "half_domain_cells": 144091,
      "standard_mesh_pass": true,
      "extended_mesh_notes": [
        "***Concave cells (using face planes) found, number of cells: 5162",
        "Failed 1 mesh checks."
      ],
      "paired_total_wall_drag_N": 0.5849300576319,
      "last200_drag_range_N": [
        0.58344754284,
        0.58689299928
      ],
      "last100_vs_previous100_drag_drift_fraction": 8.943576675100987e-05,
      "residual_initials": {
        "Ux": 1.805583812e-05,
        "Uy": 0.0001822597996,
        "Uz": 0.0002369001559,
        "p": 0.002888665488,
        "k": 2.694716436e-05,
        "omega": 2.057757714e-06
      },
      "exact_domain_face_flux_imbalance_fraction": 1.515151425199733e-09,
      "metadata": {
        "name": "p33-open-L4-U10-p2test",
        "mode": "p33-open",
        "surface_refinement": 4,
        "speed_ms": 10,
        "Re_length": 320000.0,
        "half_domain": true,
        "force_multiplier": 2,
        "rho_kgm3": 1.2,
        "reference_frontal_area_m2": 0.027,
        "reference_area_note": "Envelope width*height, not measured projected frontal area; use force and CdA for comparison.",
        "solver": "OpenFOAM 2412 simpleFoam, steady incompressible RANS kOmegaSST",
        "inlet_turbulence_intensity": 0.01,
        "turbulent_length_scale_m": 0.01,
        "ground": "No ground boundary: preliminary free-air mechanism test",
        "wheel_rotation": false,
        "heating_W": 0,
        "generator_load": 0,
        "scope": "Unvalidated numerical mechanism test. Not a high-end-car performance comparison.",
        "revision": "P3.3 matched-geometry CFD",
        "variant": "p33-open",
        "surface_sha256": "6f6da20b58545aee9f217caf21e0217733b7807533d60284888fb26c6c215e14",
        "physical_measurements": 0,
        "upper_vent_state": "Flush closed speed mode",
        "door_state": "Flush closed exterior envelope",
        "shape": "Engineering design-law body, not the luxury styling image",
        "comparison": "Total wall force; open/blocked same P3 outer envelope and P2 law with same cubic-loft policy. No transfer to high-speed claims."
      },
      "sections": [
        {
          "x_m": 0.01,
          "nominal_CAD_area_m2": 0.002826193386372188,
          "integrated_fluid_area_m2": 0.00281335934265433,
          "paired_mass_flow_kgs": 0.013639522160756975,
          "bulk_axial_speed_ms": 2.020052734638176,
          "flux_weighted_total_pressure_Pa": 59.93795992435349
        },
        {
          "x_m": 0.09,
          "nominal_CAD_area_m2": 0.0006597344572538565,
          "integrated_fluid_area_m2": 0.0006498618063961216,
          "paired_mass_flow_kgs": 0.01213797059474042,
          "bulk_axial_speed_ms": 7.782404963688125,
          "flux_weighted_total_pressure_Pa": 57.253059190413744
        },
        {
          "x_m": 0.185,
          "nominal_CAD_area_m2": 0.0007967006673464546,
          "integrated_fluid_area_m2": 0.0007871399117619603,
          "paired_mass_flow_kgs": 0.012714337491808185,
          "bulk_axial_speed_ms": 6.730240129392408,
          "flux_weighted_total_pressure_Pa": 46.68727025899191
        },
        {
          "x_m": 0.24,
          "nominal_CAD_area_m2": 0.0008011061266653972,
          "integrated_fluid_area_m2": 0.0007922101603866291,
          "paired_mass_flow_kgs": 0.012676019250948228,
          "bulk_axial_speed_ms": 6.667012053111556,
          "flux_weighted_total_pressure_Pa": 44.61329258682715
        },
        {
          "x_m": 0.33,
          "nominal_CAD_area_m2": 0.0007104050914574945,
          "integrated_fluid_area_m2": 0.0007003276733290285,
          "paired_mass_flow_kgs": 0.01199118090950941,
          "bulk_axial_speed_ms": 7.134268099405628,
          "flux_weighted_total_pressure_Pa": 37.768617197696145
        },
        {
          "x_m": 0.4,
          "nominal_CAD_area_m2": 0.0006597344572538565,
          "integrated_fluid_area_m2": 0.0006496991667539337,
          "paired_mass_flow_kgs": 0.01226629239324937,
          "bulk_axial_speed_ms": 7.866648789761527,
          "flux_weighted_total_pressure_Pa": 31.72518265903105
        },
        {
          "x_m": 0.47,
          "nominal_CAD_area_m2": 0.0009424777960769376,
          "integrated_fluid_area_m2": 0.0009325633409744197,
          "paired_mass_flow_kgs": 0.012870016988415629,
          "bulk_axial_speed_ms": 5.750287238294526,
          "flux_weighted_total_pressure_Pa": 27.87281847792806
        }
      ],
      "reconstructed_section_mass_flow_spread_fraction": 0.13067947624699525,
      "paired_internal_mass_flow_mean_kgs": 0.012613619969918317,
      "total_pressure_loss_inlet_to_exit_Pa": 32.06514144642543,
      "loss_K_at_sampled_minimum_area": 0.8420991782208204,
      "section_reconstruction_note": "Interpolated point-field ellipse cuts. Not exactly conservative; report spread, face-flux balance and mesh sensitivity separately."
    },
    {
      "name": "p33-open-L5-U10-p2test",
      "mode": "p33-open",
      "level": 5,
      "iterations": 1200.0,
      "snapshot": 1200,
      "completed": true,
      "half_domain_cells": 727117,
      "standard_mesh_pass": true,
      "extended_mesh_notes": [
        "***Concave cells (using face planes) found, number of cells: 19841",
        "Failed 1 mesh checks."
      ],
      "paired_total_wall_drag_N": 0.601891620735,
      "last200_drag_range_N": [
        0.5989348163,
        0.60518836066
      ],
      "last100_vs_previous100_drag_drift_fraction": 0.004159743822554849,
      "residual_initials": {
        "Ux": 5.23627272e-05,
        "Uy": 0.0004760579065,
        "Uz": 0.0005266219504,
        "p": 0.006371546242,
        "k": 0.0001192267568,
        "omega": 1.438467357e-05
      },
      "exact_domain_face_flux_imbalance_fraction": 2.566060603061432e-08,
      "metadata": {
        "name": "p33-open-L5-U10-p2test",
        "mode": "p33-open",
        "surface_refinement": 5,
        "speed_ms": 10,
        "Re_length": 320000.0,
        "half_domain": true,
        "force_multiplier": 2,
        "rho_kgm3": 1.2,
        "reference_frontal_area_m2": 0.027,
        "reference_area_note": "Envelope width*height, not measured projected frontal area; use force and CdA for comparison.",
        "solver": "OpenFOAM 2412 simpleFoam, steady incompressible RANS kOmegaSST",
        "inlet_turbulence_intensity": 0.01,
        "turbulent_length_scale_m": 0.01,
        "ground": "No ground boundary: preliminary free-air mechanism test",
        "wheel_rotation": false,
        "heating_W": 0,
        "generator_load": 0,
        "scope": "Unvalidated numerical mechanism test. Not a high-end-car performance comparison.",
        "revision": "P3.3 matched-geometry CFD",
        "variant": "p33-open",
        "surface_sha256": "6f6da20b58545aee9f217caf21e0217733b7807533d60284888fb26c6c215e14",
        "physical_measurements": 0,
        "upper_vent_state": "Flush closed speed mode",
        "door_state": "Flush closed exterior envelope",
        "shape": "Engineering design-law body, not the luxury styling image",
        "comparison": "Total wall force; open/blocked same P3 outer envelope and P2 law with same cubic-loft policy. No transfer to high-speed claims."
      },
      "sections": [
        {
          "x_m": 0.01,
          "nominal_CAD_area_m2": 0.002826193386372188,
          "integrated_fluid_area_m2": 0.00282042609988431,
          "paired_mass_flow_kgs": 0.01399881548787124,
          "bulk_axial_speed_ms": 2.068070419165484,
          "flux_weighted_total_pressure_Pa": 59.984131909241505
        },
        {
          "x_m": 0.09,
          "nominal_CAD_area_m2": 0.0006597344572538565,
          "integrated_fluid_area_m2": 0.0006563494943565874,
          "paired_mass_flow_kgs": 0.01324129632409733,
          "bulk_axial_speed_ms": 8.40589784732855,
          "flux_weighted_total_pressure_Pa": 57.24406746335471
        },
        {
          "x_m": 0.185,
          "nominal_CAD_area_m2": 0.0007967006673464546,
          "integrated_fluid_area_m2": 0.000793313256273187,
          "paired_mass_flow_kgs": 0.013605298544152473,
          "bulk_axial_speed_ms": 7.145820832527117,
          "flux_weighted_total_pressure_Pa": 46.923884439315735
        },
        {
          "x_m": 0.24,
          "nominal_CAD_area_m2": 0.0008011061266653972,
          "integrated_fluid_area_m2": 0.0007980829582374602,
          "paired_mass_flow_kgs": 0.013595332935478049,
          "bulk_axial_speed_ms": 7.09791131107415,
          "flux_weighted_total_pressure_Pa": 45.05967236860489
        },
        {
          "x_m": 0.33,
          "nominal_CAD_area_m2": 0.0007104050914574945,
          "integrated_fluid_area_m2": 0.00070703372346579,
          "paired_mass_flow_kgs": 0.013276448207814246,
          "bulk_axial_speed_ms": 7.82403050423982,
          "flux_weighted_total_pressure_Pa": 40.2566794532896
        },
        {
          "x_m": 0.4,
          "nominal_CAD_area_m2": 0.0006597344572538565,
          "integrated_fluid_area_m2": 0.0006563998559433737,
          "paired_mass_flow_kgs": 0.013331824679724432,
          "bulk_axial_speed_ms": 8.462718112425048,
          "flux_weighted_total_pressure_Pa": 31.968713659050863
        },
        {
          "x_m": 0.47,
          "nominal_CAD_area_m2": 0.0009424777960769376,
          "integrated_fluid_area_m2": 0.0009389638797354105,
          "paired_mass_flow_kgs": 0.013686830899182099,
          "bulk_axial_speed_ms": 6.0735522750880895,
          "flux_weighted_total_pressure_Pa": 26.059974511271722
        }
      ],
      "reconstructed_section_mass_flow_spread_fraction": 0.05597283720948396,
      "paired_internal_mass_flow_mean_kgs": 0.013533692439759982,
      "total_pressure_loss_inlet_to_exit_Pa": 33.92415739796978,
      "loss_K_at_sampled_minimum_area": 0.7739021123401295,
      "section_reconstruction_note": "Interpolated point-field ellipse cuts. Not exactly conservative; report spread, face-flux balance and mesh sensitivity separately."
    }
  ],
  "open_blocked_pairs": [
    {
      "level": 4,
      "open_drag_N": 0.5849300576319,
      "blocked_drag_N": 0.6049241979916,
      "open_drag_reduction_fraction": 0.033052307092495736,
      "scope": "This low-speed engineering body only; no Chiron or high-speed percentage."
    },
    {
      "level": 5,
      "open_drag_N": 0.601891620735,
      "blocked_drag_N": 0.6261418381822,
      "open_drag_reduction_fraction": 0.038729591233837124,
      "scope": "This low-speed engineering body only; no Chiron or high-speed percentage."
    }
  ],
  "mesh_sensitivity": [
    {
      "mode": "p33-open",
      "drag_L5_over_L4_change": 0.028997591903157094,
      "internal_flow_change": 0.07294277709617902
    },
    {
      "mode": "p33-blocked",
      "drag_L5_over_L4_change": 0.03507487427523048,
      "internal_flow_change": 0.0
    }
  ],
  "limits": [
    "Free air, fixed wheels, steady incompressible RANS, no ground, no active rotor, no heat exchanger, upper vents flush closed.",
    "Engineering design-law surface; the publicity styling is a different proposed exterior.",
    "Iterations measure solver convergence, not physical time or experimental repeatability.",
    "Do not transfer these drag differences or loss coefficients directly into the 400 km/h performance claim."
  ]
}